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== Known XSS Build List ==
== 2004 Builds ==
; Built from XenonLibrary data (used with permission). Extra columns added for CNH.
{| class="wikitable sortable" style="width:100%;"
{| class="wikitable sortable"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
! Build Date !! XSS/SDK Build !! Kernel !! Notes !! Availability !! Bounty !! Video Walkthrough !! Compatibility
|-
 
| Jan 2004 || 0180.0 || 0180.0 || 2.0.0180.0 || Coming Soon || Early Power Mac G5 Alpha bring-up; GPU init & memory validation routines introduced. || xenon-a (G5)
<!-- ========== 2004 ========== -->
|-
| Jan 2004 || 0189.0 || 0189.0 || 2.0.0189.0 || Coming Soon || Updated SDK tool-chain, compiler optimizations and memory controller tuning. || xenon-a (G5)
|-
| Jan 2004 || 0193.0 || 0193.0 || 2.0.0193.0 || Coming Soon || Fan curve fix, linker default stack size set to 1 MB. || xenon-a (G5)
|-
| Feb 2004 || 0194.0 || 0194.0 || 2.0.0194.0 || Coming Soon || Updated fan driver, improved 480 p signal stability. || xenon-a (G5)
|-
| Feb 2004 || 0195.0 || 0195.0 || 2.0.0195.0 || Coming Soon || Added 480 p support; launcher localization. || xenon-a (G5)
|-
| Feb 2004 || 0196.0 || 0196.0 || 2.0.0196.0 || Coming Soon || Warm-boot GPU hang fix; launcher bitmap change. || xenon-a (G5)
|-
| Feb 2004 || 0197.0 || 0197.0 || 2.0.0197.0 || Coming Soon || New compiler toolset, internal bug fixes. || xenon-a (G5)
|-
| Feb 2004 || 0198.0 || 0198.0 || 2.0.0198.0 || Coming Soon || Internal iteration on 0197; minor bug fixes. || xenon-a (G5)
|-
| Feb 2004 || 0199.0 || 0199.0 || 2.0.0199.0 || Coming Soon || “A5 milestone” merge to main branch; end of initial Alpha stage. || xenon-a (G5)
|-
| Feb 2004 || 0201.0 || 0201.0 || 2.0.0201.0 || Coming Soon || Compiler updates and stability fixes. || xenon-a (G5)
|-
| Feb 2004 || 0202.0 || 0202.0 || 2.0.0202.0 || Coming Soon || New fan driver; memory latency tuning; FPU/VPU corruption fix. || xenon-a (G5)
|-
| Feb 2004 || 0203.0 || 0203.0 || 2.0.0203.0 || Coming Soon || Minor bug fixes. || xenon-a (G5)
|-
| Feb 2004 || 0205.0 || 0205.0 || 2.0.0205.0 || Coming Soon || Bug-fix maintenance build. || xenon-a (G5)
|-
| Feb 2004 || 0208.0 || 0208.0 || 2.0.0208.0 || Coming Soon || Minor fixes and code cleanup. || xenon-a (G5)
|-
| Feb 2004 || 0211.0 || 0211.0 || 2.0.0211.0 || Coming Soon || Fixed launcher artifacting; stability improvements. || xenon-a (G5)
|-
| Mar 2004 || 0311.0 || 0311.0 || 2.0.0311.0 || Coming Soon || Compiler update; system profiler improvements. || xenon-a (G5)
|-
| Mar 2004 || 0313.0 || 0313.0 || 2.0.0313.0 || Coming Soon || Minor fixes. || xenon-a (G5)
|-
| Mar 2004 || 0314.0 || 0314.0 || 2.0.0314.0 || Coming Soon || Fixes crash on shutdown. || xenon-a (G5)
|-
| Mar 2004 || 0316.0 || 0316.0 || 2.0.0316.0 || Coming Soon || Stability patch for Shrek demo titles. || xenon-a (G5)
|-
| Mar 2004 || 0327.0 || 0327.0 || 2.0.0327.0 || Coming Soon || Localization fixes and minimal 720 p support. || xenon-a (G5)
|-
| Mar 2004 || 0329.0 || 0329.0 || 2.0.0329.0 || Coming Soon || Minor bug fixes. || xenon-a (G5)
|-
| Mar 2004 || 0330.0 || 0330.0 || 2.0.0330.0 || Coming Soon || Compiler alignment adjustments. || xenon-a (G5)
|-
| Mar 2004 || 0338.0 || 0338.0 || 2.0.0338.0 || Coming Soon || Internal optimization build. || xenon-a (G5)
|-
| Mar 2004 || 0401.0 || 0401.0 || 2.0.0401.0 || Coming Soon || Texture unit fix; minor bug fixes. || xenon-a (G5)
|-
| Mar 2004 || 0402.0 || 0402.0 || 2.0.0402.0 || Coming Soon || Code cleanup and QA iteration. || xenon-a (G5)
|-
| Apr 2004 || 0419.0 || 0419.0 || 2.0.0419.0 || Coming Soon || Localization update and stability fixes. || xenon-a (G5)
|-
| Apr 2004 || 0420.0 || 0420.0 || 2.0.0420.0 || Coming Soon || XUI interpolation improvements; memory leak fixes. || xenon-a (G5)
|-
| Apr 2004 || 0422.0 || 0422.0 || 2.0.0422.0 || Coming Soon || Compiler update and bug fixes. || xenon-a (G5)
|-
| Apr 2004 || 0424.0 || 0424.0 || 2.0.0424.0 || Coming Soon || XUI and DrawPrimitiveUP fix for Shrek; minor fixes. || xenon-a (G5)
|-
| May 2004 || 0431.0 || 0431.0 || 2.0.0431.0 || Coming Soon || VC++ 2005 (Whidbey) compiler integration; FP model changes. || xenon-a (G5)
|-
| Jun 2004 || 0530.0 || 0530.0 || 2.0.0530.0 || Coming Soon || Main branch external release with bug fixes. || xenon-a (G5)
|-
| Jun 2004 || 0530.1 || 0530.1 || 2.0.0530.0 || Coming Soon || Incremental fix release for 0530. || xenon-a (G5)
|-
| Jun 2004 || 0608.0 || 0608.0 || 2.0.0608.0 || Coming Soon || Minor stability build preceding the 0615 branch. || xenon-a (G5)
|-
| Jun 2004 || 0610.0 || 0610.0 || 2.0.0610.0 || Coming Soon || PIX debugger early integration; new symbol loader. || xenon-a (G5)
|-
| Jun 2004 || 0613.0 || 0613.0 || 2.0.0613.0 || Coming Soon || PIX & XACT 2.0 authoring enabled; optical-drive test hook. || xenon-a (G5)
|-
| Jun 2004 || 0615.0 || 0615.0 || 2.0.0615.0 || Coming Soon || Adds early PIX and XACT 2.0 authoring tools. || xenon-a (G5)
|-
| Jun 2004 || 0620.0 || 0620.0 || 2.0.0620.0 || Coming Soon || PIX stability fixes; bug-tracking sync. || xenon-a (G5)
|-
| Jul 2004 || 0705.0 || 0705.0 || 2.0.0705.0 || Coming Soon || New XUI panel renderer; minor SDK refactor. || xenon-a (G5)
|-
| Jul 2004 || 0707.0 || 0707.0 || 2.0.0707.0 || Coming Soon || Main branch QA iteration. || xenon-a (G5)
|-
| Jul 2004 || 0710.0 || 0710.0 || 2.0.0710.0 || Coming Soon || Compiler and kernel synchronization fixes. || xenon-a (G5)
|-
| Jul 2004 || 0712.0 || 0712.0 || 2.0.0712.0 || Coming Soon || Texture cache debug instrumentation added. || xenon-a (G5)
|-
| Jul 2004 || 0713.0 || 0713.0 || 2.0.0713.0 || Coming Soon || Minor performance optimizations. || xenon-a (G5)
|-
| Jul 2004 || 0720.0 || 0720.0 || 2.0.0720.0 || Coming Soon || Internal/External; adds “Xenon” branding assets. || xenon-a (G5)
|-
| Jul 2004 || 0722.0 || 0722.0 || 2.0.0722.0 || Coming Soon || Early Direct3D debugger integration. || xenon-a (G5)
|-
| Aug 2004 || 0801.0 || 0801.0 || 2.0.0801.0 || Coming Soon || Incremental maintenance release. || xenon-a (G5)
|-
| Aug 2004 || 0810.0 || 0810.0 || 2.0.0810.0 || Coming Soon || Security manager hook initial integration. || xenon-a (G5)
|-
| Aug 2004 || 0812.0 || 0812.0 || 2.0.0812.0 || Coming Soon || Guide prototype build (A/B test). || xenon-a (G5)
|-
| Aug 2004 || 0815.0 || 0815.0 || 2.0.0815.0 || Coming Soon || Guide prototype UX build; early FriendsUI work. || xenon-a (G5)
|-
| Aug 2004 || 0819.0 || 0819.0 || 2.0.0819.0 || Coming Soon || Stability and localization updates. || xenon-a (G5)
|-
| Aug 2004 || 0820.0 || 0820.0 || 2.0.0820.0 || Coming Soon || Studio handoff build for external testing. || xenon-a (G5)
|-
| Aug 2004 || 0824.0 || 0824.0 || 2.0.0824.0 || Coming Soon || Video encoder calibration update. || xenon-a (G5)
|-
| Aug 2004 || 0828.0 || 0828.0 || 2.0.0828.0 || Coming Soon || Sound driver refactor; improved Dolby output. || xenon-a (G5)
|-
| Aug 2004 || 0830.0 || 0830.0 || 2.0.0830.0 || Coming Soon || Main branch external release. || xenon-a (G5)
|-
| Sep 2004 || 0901.0 || 0901.0 || 2.0.0901.0 || Coming Soon || Internal testing branch start for EV1 hardware compatibility. || xenon-a (G5)
|-
| Sep 2004 || 0912.0 || 0912.0 || 2.0.0912.0 || Coming Soon || Studio QA build; GPU clock sync update. || xenon-a (G5)
|-
| Sep 2004 || 0918.0 || 0918.0 || 2.0.0918.0 || Coming Soon || Dev-only iteration on 0912; bug fixes. || xenon-a (G5)
|-
| Sep 2004 || 0920.0 || 0920.0 || 2.0.0920.0 || Coming Soon || Internal alpha stabilization build. || xenon-a (G5)
|-
| Sep 2004 || 0923.0 || 0923.0 || 2.0.0923.0 || Coming Soon || External branch integration test. || xenon-a (G5)
|-
| Sep 2004 || 0930.0 || 0930.0 || 2.0.0930.0 || Coming Soon || Major FriendsUI checkpoint build; pre-final Alpha run. || xenon-a (G5)
|-
| Sep 2004 || 0935.0 || 0935.0 || 2.0.0935.0 || Coming Soon || Last confirmed Alpha compiler refresh. || xenon-a (G5)
|-
| Oct 2004 || 1001.0 || 1001.0 || 2.0.1001.0 || Coming Soon || SDK cleanup build; compiler tool refresh. || xenon-a (G5)
|-
| Oct 2004 || 1004.0 || 1004.0 || 2.0.1004.0 || Coming Soon || Memory bandwidth retuning; GPU init fix. || xenon-a (G5)
|-
| Oct 2004 || 1011.0 || 1011.0 || 2.0.1011.0 || Coming Soon || Main branch external release. || xenon-a (G5)
|-
| Oct 2004 || 1016.0 || 1016.0 || 2.0.1016.0 || Coming Soon || Final internal Alpha validation build. || xenon-a (G5)
|-
| Nov 2004 || 1075.0 || 1075.0 || 2.0.1075.0 || Coming Soon || Localization & QA checkpoint. || xenon-a (G5)
|-
| Nov 2004 || 1082.0 || 1082.0 || 2.0.1082.0 || Coming Soon || Minor fix build preceding final. || xenon-a (G5)
|-
| Nov 2004 || 1084.0 || 1084.0 || 2.0.1084.0 || Coming Soon || SDK QFE for late Alpha transition. || xenon-a / xenon-sd
|-
| Dec 2004 || 1201.0 || 1201.0 || 2.0.1201.0 || Coming Soon || Hand-off build for EV1 pre-production testing. || xenon-a (G5)
|-
| Dec 2004 || 1204.0 || 1204.0 || 2.0.1204.0 || Coming Soon || Memory controller patch; QA bug fixes. || xenon-a (G5)
|-
| Dec 2004 || 1205.0 || 1205.0 || 2.0.1205.0 || Coming Soon || Final Alpha candidate; factory image for EV1 boards. || xenon-a (G5)
|-
| Dec 2004 || 1208.0 || 1208.0 || 2.0.1208.0 || Coming Soon || Final Alpha SDK release; EV1 hardware prep. || xenon-a (G5)
|-
| Dec 2004 || 1210.0 || 1210.0 || 2.0.1210.0 || Coming Soon || End-of-year stability roll-up and handoff to EV team. || xenon-a (G5)
|}
== 2005 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
| Jan 2005 || 1242.0 || 1242.0 || 2.0.1242.0 || Coming Soon || Final Alpha → EV transition build; new controller activation and XBDM hooks. || xenon-a / xenon-sd
|-
| Jan 2005 || 1265.0 || 1265.0 || 2.0.1265.0 || Coming Soon || First EV1 public SDK; significant kernel cleanup. || xenon-r1 (WN1)
|-
| Jan 2005 || 1281.0 || 1281.0 || 2.0.1281.0 || Coming Soon || Graphics HAL updates; Direct3D test driver added. || xenon-r1 (WN1)
|-
| Feb 2005 || 1300.0 || 1300.0 || 2.0.1300.0 || Coming Soon || Audio subsystem re-architecture; Dolby encoder enabled. || xenon-r1 (WN1)
|-
| Feb 2005 || 1332.0 || 1332.0 || 2.0.1332.0 || Coming Soon || Beta hardware thermal tuning; network stack migrated. || xenon-r1 (WN1)
|-
| Feb 2005 || 1365.0 || 1365.0 || 2.0.1365.0 || Coming Soon || New bootloader interface; factory signature test. || xenon-r1 (WN1)
|-
| Mar 2005 || 1408.0 || 1408.0 || 2.0.1408.0 || Coming Soon || Network test kernel; GPU microcode update. || xenon-r1 (WN1)
|-
| Mar 2005 || 1428.0 || 1428.0 || 2.0.1428.0 || Coming Soon || Adds Rich Presence API; HUD flicker fix. || xenon-r1 (WN1)
|-
| Mar 2005 || 1445.0 || 1445.0 || 2.0.1445.0 || Coming Soon || SDK feature expansion; first appearance of retail-mode toggles. || xenon-r1 (WN1)
|-
| Apr 2005 || 1500.0 || 1500.0 || 2.0.1500.0 || Coming Soon || Major SDK refactor; XShell 1.0 interface prototype. || xenon-r1 (WN1)
|-
| Apr 2005 || 1519.0 || 1519.0 || 2.0.1519.0 || Coming Soon || Video encoder improvements; guide performance pass. || xenon-r1 (WN1)
|-
| Apr 2005 || 1528.0 || 1528.0 || 2.0.1528.0 || Coming Soon || Early Xenon retail candidate kernel for test labs. || xenon-r1 (WN1)
|-
| May 2005 || 1601.0 || 1601.0 || 2.0.1601.0 || Coming Soon || Initial E3 demo branch; SDK “Blades” theme prototype. || xenon-r1 (WN1)
|-
| May 2005 || 1616.7 || 1616.7 || 2.0.1616.7 || Coming Soon || Factory kernel for WN1 EV3/EV4 hardware; stability baseline. || xenon-r1 (WN1)
|-
| May 2005 || 1630.0 || 1630.0 || 2.0.1630.0 || Coming Soon || Internal integration of performance counters and debug logging. || xenon-r1 (WN1)
|-
| Jun 2005 || 1640.0 || 1640.0 || 2.0.1640.0 || Coming Soon || Beta-preview hardware enablement; new DVD-emu module. || xenon-r1 (WN1)
|-
| Jun 2005 || 1655.0 || 1655.0 || 2.0.1655.0 || Coming Soon || Network stack cleanup and controller pairing update. || xenon-r1 (WN1)
|-
| Jun 2005 || 1672.0 || 1672.0 || 2.0.1672.0 || Coming Soon || Major SDK QFE; improved thread scheduler. || xenon-r1 (WN1)
|-
| Jun 2005 || 1690.0 || 1690.0 || 2.0.1690.0 || Coming Soon || Test kit manufacturing kernel; USB device stack update. || xenon-r1 (WN1)
|-
| Jun 2005 || 1700.0 || 1700.0 || 2.0.1700.0 || Coming Soon || Build used for E3 demos; first to include “Blade” dashboard assets. || xenon-r1 (WN1)
|-
| Jul 2005 || 1714.0 || 1714.0 || 2.0.1714.0 || Coming Soon || Factory diagnostics; added new NAND bootloader chain. || xenon-r1 (WN1)
|-
| Jul 2005 || 1721.0 || 1721.0 || 2.0.1721.0 || Coming Soon || Debug memory viewer; compiler sync to retail branch. || xenon-r1 (WN1)
|-
| Jul 2005 || 1740.0 || 1740.0 || 2.0.1740.0 || Coming Soon || Dashboard bug-fix build; new USB enumeration. || xenon-r1 (WN1)
|-
| Jul 2005 || 1760.0 || 1760.0 || 2.0.1760.0 || Coming Soon || Added partial retail-mode configuration to test kits. || xenon-r1 (WN1)
|-
| Aug 2005 || 1803.0 || 1803.0 || 2.0.1803.0 || Coming Soon || GPU microcode v7 update; improved framebuffer timing. || xenon-r2 (WN2)
|-
| Aug 2005 || 1825.0 || 1825.0 || 2.0.1825.0 || Coming Soon || New system update routine; better heat-throttling curve. || xenon-r2 (WN2)
|-
| Aug 2005 || 1840.0 || 1840.0 || 2.0.1840.0 || Coming Soon || Retail preparation; kernel signature logic finalized. || xenon-r2 (WN2)
|-
| Aug 2005 || 1873.0 || 1873.0 || 2.0.1873.0 || Coming Soon || Final XDK August build; side-car DVD emulator support. || xenon-r2 (WN2)
|-
| Sep 2005 || 1880.0 || 1880.0 || 2.0.1880.0 || Coming Soon || Production-ready build for mass-manufacturing test kits. || xenon-r2 (WN2)
|-
| Sep 2005 || 1881.0 || 1881.0 || 2.0.1881.0 || Coming Soon || Last internal pre-launch test pass. || xenon-r2 (WN2)
|-
| Sep 2005 || 1888.0 || 1888.0 || 2.0.1888.0 || Coming Soon || Retail base kernel (launch). || xenon-r2 (WN2)
|-
| Oct 2005 || 1900.0 || 1900.0 || 2.0.1900.0 || Coming Soon || Debug symbol refresh; retail certification prep. || xenon-r2 (WN2)
|-
| Oct 2005 || 1902.0 || 1902.0 || 2.0.1902.0 || Coming Soon || Factory QA test; HDD and DVD interface validation. || xenon-r2 (WN2)
|-
| Nov 2005 || 2241.0 || 2241.0 || 2.0.2241.0 || Coming Soon || Take-Home release candidate; launch promo SDK. || xenon-r2 (WN2)
|-
| Nov 2005 || 2255.0 || 2255.0 || 2.0.2255.0 || Coming Soon || Take-Home kernel; minor dashboard fixes. || xenon-r2 (WN2)
|-
| Nov 2005 || 2271.0 || 2271.0 || 2.0.2271.0 || Coming Soon || Early retail QFE. || xenon-r2 (WN2)
|-
|-
! colspan="8" | '''2004'''
| Nov 2005 || 2280.0 || 2280.0 || 2.0.2280.0 || Coming Soon || Localization and voice chat fixes. || xenon-r2 (WN2)
|-
|-
| January 2004 || 0180.0 || 2.0.0180.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5)
| Dec 2005 || 2500.0 || 2500.0 || 2.0.2500.0 || Coming Soon || Manufacturing kernel for launch units. || xenon-r2 (WN2)
|-
|-
| January 2004 || 0189.0 || 2.0.0189.0 || Internal/External. Update to SDK tools. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2005 || 2527.0 || 2527.0 || 2.0.2527.0 || Coming Soon || Day-1 retail update (launch dashboard revision). || xenon-r2 (WN2)
|-
|-
| January 2004 || 0193.0 || 2.0.0193.0 || Internal/External. Fixed fan issue. LINKER_STACKSIZE to 1MB. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2005 || 2531.0 || 2531.0 || 2.0.2531.0 || Coming Soon || Minor post-launch bug fixes; DVD region check fix. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0194.0 || 2.0.0194.0 || Internal/External. Updated fan driver. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2005 || 2540.0 || 2540.0 || 2.0.2540.0 || Coming Soon || Final 2005 main branch external release. || xenon-r2 (WN2)
|}
== 2006 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| February 2004 || 0195.0 || 2.0.0195.0 || Internal/External. 480p support added. Launcher localization. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jan 2006 || 2552.0 || 2552.0 || 2.0.2552.0 || Coming Soon || Manufacturing QA kernel; start of post-launch retail QFE cycle. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0196.0 || 2.0.0196.0 || Internal/External. Warm boot GPU hang note; launcher bitmap change. Bug fixes. || — || — || — || —
| Jan 2006 || 2560.0 || 2560.0 || 2.0.2560.0 || Coming Soon || Retail recovery image test; dashboard assets update. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0197.0 || 2.0.0197.0 || Internal/External. New compiler toolset. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Feb 2006 || 2571.0 || 2571.0 || 2.0.2255.0 || Coming Soon || Internal-only kernel for XDK feature testing. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0198.0 || 2.0.0198.0 || Internal. || — || — || — || xenon-a (Power Mac G5)
| Feb 2006 || 2571.1 || 2571.1 || 2.0.2255.0 || Coming Soon || First external kernel with test-kit ROM. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0199.0 || 2.0.0199.0 || Internal. Final A5 milestone (initial partner release) merged to main. || — || — || — || xenon-a (Power Mac G5)
| Mar 2006 || 2732.0 || 2732.0 || 2.0.2420.0 || Coming Soon || External main branch release. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0201.0 || 2.0.0201.0 || Internal/External. New compiler toolset. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Mar 2006 || 2744.0 || 2744.0 || 2.0.2432.0 || Coming Soon || Bug fix and minor performance improvement build. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0202.0 || 2.0.0202.0 || Internal/External. Fan driver; G5 memory latency; FPU/VPU fix. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Apr 2006 || 2808.0 || 2808.0 || 2.0.2508.0 || Coming Soon || Test-kit firmware refresh; dashboard performance pass. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0203.0 || 2.0.0203.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Apr 2006 || 2920.0 || 2920.0 || 2.0.2832.0 || Coming Soon || “Spring Update” preview integration. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0205.0 || 2.0.0205.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| May 2006 || 3008.0 || 3008.0 || 2.0.2832.0 || Coming Soon || XUI update with retail dashboard improvements. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0208.0 || 2.0.0208.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| May 2006 || 3100.0 || 3100.0 || 2.0.2832.0 || Coming Soon || Performance and dashboard bug fixes. || xenon-r2 (WN2)
|-
|-
| February 2004 || 0211.0 || 2.0.0211.0 || Internal/External. Artifacting while launcher runs. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jun 2006 || 3400.0 || 3400.0 || 2.0.2858.0 || Coming Soon || Minor kernel fix before SDK QFE. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0311.0 || 2.0.0311.0 || Internal/External. New compiler toolset. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jun 2006 || 3424.0 || 3424.0 || 2.0.2858.0 || Coming Soon || SDK feature expansion (QFE). || xenon-r2 (WN2)
|-
|-
| March 2004 || 0313.0 || 2.0.0313.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jul 2006 || 3600.0 || 3600.0 || 2.0.2880.0 || Coming Soon || Network security patch. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0314.0 || 2.0.0314.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jul 2006 || 3688.0 || 3688.0 || 2.0.2888.0 || Coming Soon || Added new internal dev hooks. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0316.0 || 2.0.0316.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Aug 2006 || 4000.0 || 4000.0 || 2.0.2930.0 || Coming Soon || Studio-request build; bug-fix release. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0327.0 || 2.0.0327.0 || Internal/External. Localization fixes. Minimal 720p. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Aug 2006 || 4200.0 || 4200.0 || 2.0.2950.0 || Coming Soon || Test-kit recovery kernel; updated HDD partitioning. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0329.0 || 2.0.0329.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Sep 2006 || 4400.0 || 4400.0 || 2.0.3000.0 || Coming Soon || Dashboard UI update; localization refresh. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0330.0 || 2.0.0330.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Sep 2006 || 4500.0 || 4500.0 || 2.0.3100.0 || Coming Soon || GPU driver optimization; new recovery installer. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0338.0 || 2.0.0338.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5)
| Oct 2006 || 4600.0 || 4600.0 || 2.0.3400.0 || Coming Soon || Bug fix; preparation for Fall Update. || xenon-r2 (WN2)
|-
|-
| March 2004 || 0401.0 || 2.0.0401.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Nov 2006 || 4802.0 || 4802.0 || 2.0.4532.0 || Coming Soon || Fall Update (Launch Dashboard). || xenon-r2 / zephyr-r1 (WN2)
|-
|-
| March 2004 || 0402.0 || 2.0.0402.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Nov 2006 || 4814.0 || 4814.0 || 2.0.4532.0 || Coming Soon || External QFE patch to Fall Update. || xenon-r2 / zephyr-r1 (WN2)
|-
|-
| April 2004 || 0419.0 || 2.0.0419.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2006 || 4928.0 || 4928.0 || 2.0.4548.0 || Coming Soon || Zephyr enablement build. || xenon-r2 / zephyr-r1 (WN2)
|-
|-
| April 2004 || 0420.0 || 2.0.0420.0 || Internal/External. XUI interpolation improvements. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2006 || 4929.0 || 4929.0 || 2.0.4548.0 || Coming Soon || Adds Zephyr ROM; HDMI support preparation. || xenon-r2 / zephyr-r1 (WN2)
|-
|-
| April 2004 || 0422.0 || 2.0.0422.0 || Internal/External. New compiler toolset. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2006 || 4933.0 || 4933.0 || 2.0.4548.0 || Coming Soon || Final 2006 SDK external release. || xenon-r2 / zephyr-r1 (WN2)
|}
== 2007 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| April 2004 || 0424.0 || 2.0.0424.0 || Internal/External. XUI improvements; DrawPrimitiveUP for Shrek. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jan 2007 || 5408.0 || 5408.0 || 2.0.5408.0 || Coming Soon || Internal build; kernel scheduler and NAND timing updates. || xenon-r2 (WN2)
|-
|-
| May 2004 || 0431.0 || 2.0.0431.0 || Internal/External. Compiler based on VC++ 2005 “Whidbey”; conformance & FP model. Bug fixes. || — || — || — || SDK QFE
| Jan 2007 || 5501.0 || 5501.0 || 2.0.5501.0 || Coming Soon || External QFE release. || xenon-r2 (WN2); zephyr-r1 (WN2)
|-
|-
| June 2004 || 0530.0 || 2.0.0530.0 || Internal/External. Main branch external release. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Feb 2007 || 5530.0 || 5530.0 || 2.0.5530.0 || Coming Soon || Studio-request build; adds early Falcon ROM support. || xenon-r2; zephyr-r1
|-
|-
| June 2004 || 0530.1 || 2.0.0530.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Apr 2007 || 5600.0 || 5600.0 || 2.0.5600.0 || Coming Soon || Factory test branch kernel. || xenon-r2 (WN2)
|-
|-
| June 2004 || 0612.0 || 2.0.0612.0 || Internal/External. Bug fixes. || — || — || — || —
| May 2007 || 5632.2 || 5632.2 || 2.0.5759.0 || Coming Soon || Main branch external release; minor UI changes. || xenon-r2 (WN2)
|-
|-
| June 2004 || 0615.0 || 2.0.0615.0 || Internal/External. Main branch external. Early PIX; XACT 2.0 authoring; network DVD emu. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| May 2007 || 5632.4 || 5632.4 || 2.0.5759.0 || Coming Soon || Studio QFE patch for 5632.2. || xenon-r2 (WN2)
|-
|-
| June 2004 || 0620.0 || 2.0.0620.0 || Internal/External. Bug fixes. || — || — || — || —
| May 2007 || 5759.0 || 5759.0 || 2.0.5759.0 || Coming Soon || Internal/External dual build; supports Zephyr and early Falcon. || xenon-r2 (WN2); zephyr-r1 (WN2); falcon-r1 (Loki)
|-
|-
| June 2004 || 0622.0 || 2.0.0622.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jun 2007 || 6132.0 || 6132.0 || 2.0.5759.0 || Coming Soon || Studio request (EA); bug-fix roll-up. || xenon-r2 (WN2); zephyr-r1 (WN2)
|-
|-
| June 2004 || 0625.0 || 2.0.0625.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jun 2007 || 6132.2 || 6132.2 || 2.0.5766.0 || Coming Soon || Same as 6132.0 with additional UI assets. || xenon-r2 (WN2); zephyr-r1 (WN2)
|-
|-
| June 2004 || 0634.0 || 2.0.0634.0 || Internal/External. Main branch external release. Bug fixes. || — || — || — || —
| Jun 2007 || 6132.5 || 6132.5 || 2.0.5759.0 || Coming Soon || Maintenance build; partner studio request. || xenon-r2 (WN2)
|-
|-
| July 2004 || 0708.0 || 2.0.0708.0 || Internal/External. Bug fixes. || — || — || — || —
| Jul 2007 || 6274.0 || 6274.0 || 2.0.5759.0 || Coming Soon || External QFE release; intro of Zephyr_B and Zephyr_C ROMs. || xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C
|-
|-
| July 2004 || 0711.0 || 2.0.0711.0 || Internal/External. Bug fixes. || — || — || — || —
| Jul 2007 || 6274.2 || 6274.2 || 2.0.5766.0 || Coming Soon || Studio-request release for compatibility testing. || xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C
|-
|-
| July 2004 || 0713.0 || 2.0.0713.0 || Internal/External. Bug fixes. || — || — || — || —
| Aug 2007 || 6534.0 || 6534.0 || 2.0.5787.0 || Coming Soon || Main branch external; final WN2 kernel for Zephyr. || xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C
|-
|-
| July 2004 || 0714.0 || 2.0.0714.0 || Internal/External. Bug fixes. || — || — || — || —
| Aug 2007 || 6534.4 || 6534.4 || 2.0.6683.0 || Coming Soon || Main branch external; supports Falcon test boards. || xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C; falcon-r1
|-
|-
| July 2004 || 0715.0 || 2.0.0715.0 || Internal/External. Bug fixes. || — || — || — || —
| Sep 2007 || 6742.0 || 6742.0 || 2.0.6742.0 || Coming Soon || Final external 2007 SDK; introduces Falcon (Loki) in full. || xenon-r2; zephyr-r1; falcon-r1 (Loki)
|-
|-
| June 2004 || 0716.0 || 2.0.0716.0 || Internal/External. Bug fixes. || — || — || — || —
| Sep 2007 || 6742.1 || 6742.1 || 2.0.6742.1 || Coming Soon || Minor bug-fix follow-up build. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| August 2004 || 0731.0 || 2.0.0731.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Oct 2007 || 6760.0 || 6760.0 || 2.0.6760.0 || Coming Soon || Studio-request test kernel; factory QA. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| August 2004 || 0810.0 || 2.0.0814.0 || Internal/External. Bug fixes. || — || — || — || —
| Nov 2007 || 6771.0 || 6771.0 || 2.0.6771.0 || Coming Soon || Studio-internal preview; bug fixes for Fall 2007 update. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| September 2004 || 0919.0 || 2.0.0919.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Nov 2007 || 6780.0 || 6780.0 || 2.0.6780.0 || Coming Soon || Main branch maintenance release. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| September 2004 || 0920.0 || 2.0.0920.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Dec 2007 || 6788.0 || 6788.0 || 2.0.6788.0 || Coming Soon || Final 2007 build; transition to 2008 base kernel. || xenon-r2; zephyr-r1; falcon-r1
|}
== 2008 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| October 2004 || 0930.0 || 2.0.0930.0 || Internal/External. Major FriendsUI checkpoint. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| Jan 2008 || 6900.0 || 6900.0 || 2.0.6683.0 || Coming Soon || Internal main branch continuation; pre-Jasper SDK merge. || xenon-r2; zephyr-r1; falcon-r1 (Loki)
|-
|-
| October 2004 || 1012.0 || 2.0.1012.0 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Feb 2008 || 6995.0 || 6995.0 || 2.0.6686.0 || Coming Soon || Main branch external release; first SDK with Falcon ROM. || xenon-r2; zephyr-r1; falcon-r1 (Loki)
|-
|-
| October 2004 || 1013.0 || 2.0.1013.0 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Feb 2008 || 6995.1 || 6995.1 || 2.0.6690.0 || Coming Soon || External patch for 6995.0; factory QA branch. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| October 2004 || 1015.0 || 2.0.1015.0 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Mar 2008 || 7015.0 || 7015.0 || 2.0.6690.0 || Coming Soon || Studio-request build for engine testing. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| October 2004 || 1016.0 || 2.0.1016.0 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Apr 2008 || 7114.0 || 7114.0 || 2.0.6690.0 || Coming Soon || External build with minor network fixes. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| October 2004 || 1017.0 || 2.0.1017.0 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Apr 2008 || 7201.0 || 7201.0 || 2.0.6690.0 || Coming Soon || SDK QFE for middleware vendors. || xenon-r2; zephyr-r1; falcon-r1
|-
|-
| November 2004 || 1029.0 || 2.0.1029.0 || Internal/External. Bug fixes. || — || — || — || xenon-a (Power Mac G5)
| May 2008 || 7645.0 || 7645.0 || 2.0.6690.0 || Coming Soon || Main branch external release; common in development kits. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| November 2004 || 1084.0 || 2.0.1084.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9)
| Jun 2008 || 7714.0 || 7714.0 || 2.0.6714.0 || Coming Soon || Internal test release; early Jasper ROM work. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| November 2004 || 1108.0 || 2.0.1108.0 || Internal/External. || — || — || — || SDK QFE
| Jun 2008 || 7717.0 || 7717.0 || 2.0.6717.0 || Coming Soon || QFE fix for 7714; internal and external parity build. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| November 2004 || 1109.0 || 2.0.1109.0 || Internal/External. || — || — || — || SDK QFE
| Jul 2008 || 7776.0 || 7776.0 || 2.0.6719.0 || Coming Soon || Main branch release; early NXE prep kernel. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| November 2004 || 1111.0 || 2.0.1111.0 || Internal/External. || — || — || — || SDK QFE
| Jul 2008 || 7776.1 || 7776.1 || 2.0.6719.0 || Coming Soon || External QFE for 7776.0; official partner build. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| November 2004 || 1112.0 || 2.0.1112.0 || Internal/External. || — || — || — || SDK QFE
| Aug 2008 || 7800.0 || 7800.0 || 2.0.7308.0 || Coming Soon || NXE prototype dashboard testing branch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| November 2004 || 1113.0 || 2.0.1113.0 || Internal/External. || — || — || — || SDK QFE
| Sep 2008 || 7936.0 || 7936.0 || 2.0.7936.0 || Coming Soon || Main branch external release; SDK compatibility QFE. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| December 2004 || 1141.0 || 2.0.1141.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5)
| Sep 2008 || 7938.0 || 7938.0 || 2.0.7938.0 || Coming Soon || Studio-request build for video playback QA. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| December 2004 || 1203.0 || 2.0.1203.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9)
| Oct 2008 || 7352.0 || 7352.0 || 2.0.7352.0 || Coming Soon || Take-Home package; first NXE user interface test. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| December 2004 || 1208.0 || 2.0.1208.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9)
| Oct 2008 || 7978.0 || 7978.0 || 2.0.7342.0 || Coming Soon || Studio-request build for localized dashboard QA. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
 
<!-- ========== 2005 (partial start so you can test formatting) ========== -->
|-
|-
! colspan="8" | '''2005'''
| Nov 2008 || 7357.0 || 7357.0 || 2.0.7357.0 || Coming Soon || External release; first NXE dashboard public branch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1232.0 || 2.0.1232.0 || Internal/External. Used for EV2 bringup. || — || — || — || xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9)
| Nov 2008 || 7363.0 || 7363.0 || 2.0.7363.0 || Coming Soon || Factory QFE; bug fixes to NXE launch branch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1233.0 || 2.0.1233.0 || Internal/External. Used for EV2 bringup. || — || — || — || xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9)
| Dec 2008 || 7381.0 || 7381.0 || 2.0.7381.0 || Coming Soon || End-of-year NXE update; retail dashboard sync. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1242.0 || 2.0.1242.0 || Controllers inactive at boot; Alpha R300 dropped; R420 required; compiler bug (C10001). || — || — || — || xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9)
| Dec 2008 || 7390.0 || 7390.0 || 2.0.7390.0 || Coming Soon || Minor NXE patch; video codec updates. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|}
== 2009 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| January 2005 || 1242.1 || 2.0.1242.1 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Jan 2009 || 8000.0 || 8000.0 || 2.0.8000.0 || Coming Soon || First major NXE maintenance kernel. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| February 2005 || 1315.0 || 2.0.1315.0 || Internal/External. Bug fixes. || — || — || — || xenon-a / xenon-sd / xenon-r1 (WN1)
| Feb 2009 || 8250.0 || 8250.0 || 2.0.8250.0 || Coming Soon || Bug-fix branch; video pipeline improvements. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| February 2005 || 1329.0 || 2.0.1329.0 || Internal/External. Bug fixes. || — || — || — || xenon-a / xenon-sd / xenon-r1 (WN1)
| Mar 2009 || 8276.0 || 8276.0 || 2.0.7366.0 || Coming Soon || Main branch external release; SDK stability QFE. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| February 2005 || 1332.0 || 2.0.1332.0 || Main branch external. New XSession API (matchmaking, leaderboards, quick voice chat). || — || — || — || xenon-a / xenon-sd / xenon-r1 (WN1)
| Mar 2009 || 8276.1 || 8276.1 || 2.0.7371.0 || Coming Soon || SDK QFE for NXE; adds new DevLauncher support. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1418.0 || 2.0.1418.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Apr 2009 || 8325.0 || 8325.0 || 2.0.8325.0 || Coming Soon || Dashboard preview branch; system memory patch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1419.0 || 2.0.1419.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| May 2009 || 8456.0 || 8456.0 || 2.0.8456.0 || Coming Soon || NXE maintenance release; adds new error-reporting system. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1423.0 || 2.0.1423.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Jun 2009 || 8464.0 || 8464.0 || 2.0.8464.0 || Coming Soon || Partner studio release; bug fixes. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1427.0 || 2.0.1427.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Jun 2009 || 9063.0 || 9063.0 || 2.0.9063.0 || Coming Soon || Early Trinity integration kernel (unreleased). || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1428.0 || 2.0.1428.0 || Live BVTs: Rich Presence & Session tests; HUD flicker fix. || — || — || — || xenon-r1 (WN1)
| Jun 2009 || 9065.0 || 9065.0 || 2.0.9065.0 || Coming Soon || Bug fixes; XShell refactor. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1502.0 || 2.0.1502.0 || 15xx branch; pushed changes as 1428 (same day). || — || — || — || xenon-r1 (WN1)
| Jun 2009 || 9068.0 || 9068.0 || 2.0.9068.0 || Coming Soon || Early Kinect (Natal) input stub added. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1429.0 || 2.0.1429.0 || XSession API fixes. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Jul 2009 || 9069.0 || 9069.0 || 2.0.9069.0 || Coming Soon || Performance tuning and GPU watchdog patch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1430.0 || 2.0.1430.0 || Bug fixes. || — || — || — || xenon-r1 (WN1)
| Jul 2009 || 9071.0 || 9071.0 || 2.0.9071.0 || Coming Soon || QA testing kernel for 9xxx branch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1504.0 || 2.0.1504.0 || Bug fixes. || — || — || — || xenon-r1 (WN1)
| Jul 2009 || 9072.0 || 9072.0 || 2.0.9072.0 || Coming Soon || Internal test; beginning of Trinity EV3 branch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1433.0 || 2.0.1433.0 || Bug fixes. || — || — || — || xenon-r1 (WN1)
| Aug 2009 || 9074.0 || 9074.0 || 2.0.9074.0 || Coming Soon || Trinity EV3 manufacturing kernel. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
! colspan="8" | '''2005'''
| Aug 2009 || 9328.0 || 9328.0 || 2.0.8464.0 || Coming Soon || Main branch external release; bug fixes and security patch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1232.0 || 2.0.1232.0 || Internal/External. Used for EV2 bringup. || — || — || — || xenon-a (Power Mac G5); xenon-sd (Shiva/DD.9)
| Aug 2009 || 9328.5 || 9328.5 || 2.0.8498.0 || Coming Soon || Main branch external QFE; stability fixes. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1233.0 || 2.0.1233.0 || Internal/External. Used for EV2 bringup. || — || — || — || xenon-a (Power Mac G5); xenon-sd (Shiva/DD.9)
| Sep 2009 || 9328.8 || 9328.8 || 2.0.8507.0 || Coming Soon || Main branch update; adds system crash logging. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1242.0 || 2.0.1242.0 || Controllers inactive at startup; Alpha R300 dropped; R420 required; compiler bug C10001. || — || — || — || xenon-a (Power Mac G5); xenon-sd (Shiva/DD.9)
| Sep 2009 || 9472.0 || 9472.0 || 2.0.8009.0 || Coming Soon || Studio request; demo-unit factory kernel. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| January 2005 || 1242.1 || 2.0.1242.1 || Internal/External. Bug fixes. || — || — || — || SDK QFE
| Oct 2009 || 9134.0 || 9134.0 || 2.0.9134.0 || Coming Soon || Stability patch for 907x kernels; factory internal. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| February 2005 || 1315.0 || 2.0.1315.0 || Internal/External. Bug fixes. || — || — || — || xenon-a; xenon-sd; xenon-r1 (WN1)
| Oct 2009 || 8958.0 || 8958.0 || 2.0.8958.0 || Coming Soon || Bug-fix build; early Kinect driver integration. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| February 2005 || 1329.0 || 2.0.1329.0 || Internal/External. Bug fixes. || — || — || — || xenon-a; xenon-sd; xenon-r1 (WN1)
| Nov 2009 || 9501.0 || 9501.0 || 2.0.8014.0 || Coming Soon || Studio-request demo branch for internal events. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| February 2005 || 1332.0 || 2.0.1332.0 || Main branch external. Introduces XSession API, marketplace + quick voice chat. || — || — || — || xenon-a; xenon-sd; xenon-r1 (WN1)
| Dec 2009 || 10089.0 || 10089.0 || 2.0.10089.0 || Coming Soon || End-of-year SDK; introduces Kinect preview APIs. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|}
== 2010 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| March 2005 || 1418.0 || 2.0.1418.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Jan 2010 || 9190.0 || 9190.0 || 2.0.9190.0 || Coming Soon || Pre-Natal integration kernel; first full Trinity compatibility test. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1419.0 || 2.0.1419.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Feb 2010 || 9199.0 || 9199.0 || 2.0.9199.0 || Coming Soon || NXE QFE and Natal input stability fixes; widely distributed. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1423.0 || 2.0.1423.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Feb 2010 || 11164.1 || 11164.1 || 2.0.8033.0 / 2.0.8955.0 / 2.0.9199.0 || Coming Soon || Main branch external release; final NXE kernel before Kinect SDK. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1427.0 || 2.0.1427.0 || Internal/External. Bug fixes. || — || — || — || xenon-r1 (WN1)
| Mar 2010 || 11427.0 || 11427.0 || 2.0.11008.0 || Coming Soon || Early Kinect (“Natal”) devkit firmware. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1428.0 || 2.0.1428.0 || Live BVTs (Rich Presence, Session); HUD flicker fix; bug fixes. || — || — || — || xenon-r1 (WN1)
| Mar 2010 || 11461.0 || 11461.0 || 2.0.11003.0 || Coming Soon || “Natal Preview” kernel; SDK includes new sensor APIs. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1502.0 || 2.0.1502.0 || 15xx branch; pushed as 1428 same day. || — || — || — || xenon-r1 (WN1)
| Mar 2010 || 12087.0 || 12087.0 || 2.0.9199.0 / 2.0.11003.0 / 2.0.12087.0 || Coming Soon || Spring 2010 Preview; includes early Kinect shell elements. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1429.0 || 2.0.1429.0 || XSession API fixes; bug fixes. || — || — || — || xenon-r1 (WN1)
| Apr 2010 || 12138.0 || 12138.0 || 2.0.9199.0 / 2.0.11007.0 / 2.0.12138.0 || Coming Soon || Studio-request build; used by external partners for Kinect demo titles. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1430.0 || 2.0.1430.0 || Bug fixes. || — || — || — || xenon-r1 (WN1)
| Apr 2010 || 11164.3 || 11164.3 || 2.0.8033.0 / 2.0.9199.0 || Coming Soon || Studio-request variant of 11164; added toolchain updates. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1504.0 || 2.0.1504.0 || Bug fixes. || — || — || — || xenon-r1 (WN1)
| May 2010 || 11511.0 || 11511.0 || 2.0.11025.0 || Coming Soon || Main branch external release; updated Kinect drivers. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| March 2005 || 1433.0 || 2.0.1433.0 || Bug fixes. || — || — || — || xenon-r1 (WN1)
| May 2010 || 11512.0 || 11512.0 || 2.0.11026.0 || Coming Soon || Follow-up to 11511; small SDK fixes. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1434.0 || 2.0.1434.0 || Main branch external release. || — || — || — || xenon-a (Power Mac G5); xenon-sd (Shiva/DD.9); xenon-r1 (WN1)
| May 2010 || 11513.0 || 11513.0 || 2.0.11027.0 || Coming Soon || Updated retail compatibility test image. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| March 2005 || 1508.0 || 2.0.1508.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| May 2010 || 11564.0 || 11564.0 || 2.0.9199.0 / 2.0.12145.0 / 2.0.99999.0 || Coming Soon || TakeHome flash package; pre-release Live client kernel. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| April 2005 || 1510.0 || 2.0.1510.0 || Internal/External. || — || — || — || xenon-a; xenon-sd; xenon-r1 (WN1)
| Jun 2010 || 12230.0 || 12230.0 || 2.0.12230.0 || Coming Soon || Studio-request build for Kinect middleware validation. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1
|-
|-
| April 2005 || 1515.0 || 2.0.1515.0 || Internal/External. || — || — || — || xenon-a; xenon-sd; xenon-r1 (WN1)
| Jul 2010 || 12291.0 || 12291.0 || 2.0.12291.0 || Coming Soon || Public preview kernel for Kinect developer units. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| April 2005 || 1522.0 || 2.0.1522.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Aug 2010 || 12416.0 || 12416.0 || 2.0.12416.0 || Coming Soon || Retail preview; added support for new system NAND layouts. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| April 2005 || 1529.0 || 2.0.1529.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Sep 2010 || 12464.0 || 12464.0 || 2.0.12464.0 || Coming Soon || QFE update; includes Kinect shell and game SDK refinements. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| April 2005 || 1538.0 || 2.0.1538.0 || Main branch external release. || — || — || — || xenon-a; xenon-sd; xenon-r1 (WN1)
| Oct 2010 || 12606.0 || 12606.0 || 2.0.12606.0 || Coming Soon || Finalized retail dashboard for Kinect launch (NXE2). || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| April 2005 || 1610.0 || 2.0.1610.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Nov 2010 || 12611.0 || 12611.0 || 2.0.12611.0 || Coming Soon || Retail Kinect launch kernel; first NXE2 production release. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| May 2005 || 1615.0 || 2.0.1615.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Dec 2010 || 12625.0 || 12625.0 || 2.0.12625.0 || Coming Soon || Year-end NXE2 QFE; retail performance fixes. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|}
== 2011 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| May 2005 || 1616.4 || 2.0.1616.4 || Planned manufacturing factory kernel for WN1 (EV3/EV4, typically Xenon FAB G). || — || — || — || xenon-r1 (WN1)
| Jan 2011 || 12631.0 || 12631.0 || 2.0.12631.0 || Coming Soon || Early internal NXE2 follow-up build; stability testing for Slim units. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| June 2005 || 1746.1 || 2.0.1746.1 || Main branch external release; many SDK/PIX fixes; early Live camera kits. || — || — || — || xenon-r1 (WN1)
| Feb 2011 || 12635.0 || 12635.0 || 2.0.12635.0 || Coming Soon || Retail maintenance kernel; Kinect calibration improvements. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| July 2005 || 1810.5 || 2.0.1810.5 || Manufacturing factory kernel for EV5/DV samples. || — || — || — || xenon-r1 (WN1)
| Mar 2011 || 13141.0 || 13141.0 || 2.0.13141.0 || Coming Soon || Beta dashboard; updated Kinect runtime. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| July 2005 || 1814.0 || 2.0.1814.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Apr 2011 || 13146.0 || 13146.0 || 2.0.13146.0 || Coming Soon || Beta retail update; adds XGD3 disc format support. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| July 2005 || 1831.0 || 2.0.1831.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| May 2011 || 13150.0 || 13150.0 || 2.0.13150.0 || Coming Soon || Early preview of Metro dashboard kernel. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| July 2005 || 1834.0 || 2.0.1834.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Jun 2011 || 13599.0 || 13599.0 || 2.0.13599.0 || Coming Soon || Retail summer update; Live service patch. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| July 2005 || 1836.0 || 2.0.1836.0 || Internal/External. || — || — || — || xenon-r1 (WN1)
| Jul 2011 || 13604.0 || 13604.0 || 2.0.13604.0 || Coming Soon || Internal main branch; Metro UI test. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| August 2005 || 1838.0 || 2.0.1838.0 || August preview; major kernel for beta hardware. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Aug 2011 || 13699.0 || 13699.0 || 2.0.13699.0 || Coming Soon || Internal developer update for partner SDKs. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
|-
|-
| August 2005 || 1838.1 || 2.0.1838.1 || Memory page size default 64KB; marketplace updates; side tools; avatars. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Sep 2011 || 13785.0 || 13785.0 || 2.0.13785.0 || Coming Soon || Public beta branch; Metro-style dash rollout. || xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1; corona-r1
|-
|-
| August 2005 || 1839.2 || 2.0.1839.2 || Manufacturing factory kernel for DVT and final Xenon dev hw. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Oct 2011 || 13804.0 || 13804.0 || 2.0.13804.0 || Coming Soon || Factory pre-install branch for 2011 retail units. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1846.0 || 2.0.1846.0 || Internal/External. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Nov 2011 || 14699.0 || 14699.0 || 2.0.14699.0 || Coming Soon || Official “Metro” dashboard release (Fall 2011 update). || trinity-r1; corona-r1
|-
|-
| August 2005 || 1849.0 || 2.0.1849.0 || Internal/External. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Dec 2011 || 14717.0 || 14717.0 || 2.0.14717.0 || Coming Soon || Maintenance build; dashboard UI bug fixes. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1852.0 || 2.0.1852.0 || Internal/External. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Dec 2011 || 14719.0 || 14719.0 || 2.0.14719.0 || Coming Soon || Retail update for 2011 consoles; Live service adjustments. || trinity-r1; corona-r1
|}
== 2012 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| August 2005 || 1853.0 || 2.0.1853.0 || Internal/External. || — || — || — || xenon-r1 (WN1); xenon-r2 (WN2)
| Jan 2012 || 14785.0 || 14785.0 || 2.0.14785.0 || Coming Soon || Internal maintenance build; kernel cleanup and scheduler updates. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1856.0 || 2.0.1856.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Feb 2012 || 14789.0 || 14789.0 || 2.0.14789.0 || Coming Soon || Minor QFE; dash memory optimization. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1859.0 || 2.0.1853.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Mar 2012 || 15557.0 || 15557.0 || 2.0.15557.0 || Coming Soon || Metro UI polish build; pre-summer beta branch. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1861.0 || 2.0.1861.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Apr 2012 || 15572.0 || 15572.0 || 2.0.15572.0 || Coming Soon || Public beta kernel; network stability fixes. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1863.0 || 2.0.1863.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| May 2012 || 15574.0 || 15574.0 || 2.0.15574.0 || Coming Soon || Summer 2012 dashboard release; retail rollout kernel. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1864.0 || 2.0.1864.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Jun 2012 || 16202.0 || 16202.0 || 2.0.16202.0 || Coming Soon || Developer update; Xbox Live protocol update. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1865.0 || 2.0.1865.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Jul 2012 || 16203.0 || 16203.0 || 2.0.16203.0 || Coming Soon || SDK branch; partner demo kernel. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1868.0 || 2.0.1868.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Aug 2012 || 16209.0 || 16209.0 || 2.0.16209.0 || Coming Soon || Factory QA update; manufacturing kernel for 2012 units. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1869.0 || 2.0.1869.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Sep 2012 || 16211.0 || 16211.0 || 2.0.16211.0 || Coming Soon || Minor QFE; stability and Kinect fixes. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1870.0 || 2.0.1870.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Oct 2012 || 16212.0 || 16212.0 || 2.0.16212.0 || Coming Soon || Xbox Live compatibility kernel update. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1870.2 || 2.0.1870.2 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Nov 2012 || 16217.0 || 16217.0 || 2.0.16217.0 || Coming Soon || Dashboard refresh; improved security layer. || trinity-r1; corona-r1
|-
|-
| August 2005 || 1871.0 || 2.0.1871.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Dec 2012 || 16232.0 || 16232.0 || 2.0.16232.0 || Coming Soon || Pre-“Xbox 360E” kernel branch; adds revised NAND layout support. || trinity-r1; corona-r2
|}
== 2013 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| August 2005 || 1872.0 || 2.0.1872.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Jan 2013 || 16243.0 || 16243.0 || 2.0.16243.0 || Coming Soon || Internal early-year refresh; QA branch. || trinity-r1; corona-r2
|-
|-
| August 2005 || 1873.0 || 2.0.1973.0 || August Final XDK; main branch external; adds XbGameDisc sidecars USB 2.0; drops beta preview hw. || — || — || — || xenon-r2 (WN2)
| Feb 2013 || 16267.0 || 16267.0 || 2.0.16267.0 || Coming Soon || Metro UI refresh; partner demo kernel. || trinity-r1; corona-r2
|-
|-
| August 2005 || 1875.0 || 2.0.1875.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Mar 2013 || 16283.0 || 16283.0 || 2.0.16283.0 || Coming Soon || Security certificate update; network layer fixes. || trinity-r1; corona-r2
|-
|-
| August 2005 || 1880.0 || 2.0.1880.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Apr 2013 || 16285.0 || 16285.0 || 2.0.16285.0 || Coming Soon || Internal main branch; Live service beta testing. || trinity-r1; corona-r2
|-
|-
| September 2005 || 1888.0 || 2.0.1888.0 || Main branch base kernel. || — || — || — || xenon-r2 (WN2)
| May 2013 || 16297.0 || 16297.0 || 2.0.16297.0 || Coming Soon || Studio-request build; certification toolchain update. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.1 || 2.0.1888.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Jun 2013 || 16299.0 || 16299.0 || 2.0.16299.0 || Coming Soon || Manufacturing kernel for Xbox 360E retail systems. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.2 || 2.0.1888.0 || Fix shader issues present in 2099.1. || — || — || — || xenon-r2 (WN2)
| Jul 2013 || 16306.0 || 16306.0 || 2.0.16306.0 || Coming Soon || Xbox 360E retail dashboard; Live services unified build. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.3 || 2.0.1888.0 || Fixes GPU hang; accurate DVD emulation; SDK fixes. || — || — || — || xenon-r2 (WN2)
| Aug 2013 || 16309.0 || 16309.0 || 2.0.16309.0 || Coming Soon || Post-retail patch for system service reliability. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.4 || 2.0.1888.0 || Stability fixes; symbols updated; title libs unchanged vs 2099.3. || — || — || — || xenon-r2 (WN2)
| Sep 2013 || 16319.0 || 16319.0 || 2.0.16319.0 || Coming Soon || Partner SDK update; Xbox One integration support hooks. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.6 || 2.0.1888.0 || Fixes triangle clipper GPU hang; tool fixes. || — || — || — || xenon-r2 (WN2)
| Oct 2013 || 16537.0 || 16537.0 || 2.0.16537.0 || Coming Soon || Retail Fall 2013 dashboard; last full SDK release. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.7 || 2.0.1888.0 || Updates emulator firmware to 6D; multiple tool fixes. || — || — || — || xenon-r2 (WN2)
| Nov 2013 || 16547.0 || 16547.0 || 2.0.16547.0 || Coming Soon || Final cross-platform 360/One update; Live service compatibility. || trinity-r1; corona-r2
|-
|-
| September 2005 || 2099.9 || 2.0.1888.0 || Adds heap runtime checks; several tool fixes. || — || — || — || xenon-r2 (WN2)
| Dec 2013 || 16559.0 || 16559.0 || 2.0.16559.0 || Coming Soon || End-of-year QFE for 360E hardware; last known devkit kernel. || trinity-r1; corona-r2
|}
== 2014 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| September 2005 || 2112.0 || 2.0.2112.0 || Internal/External/TakeHome. || — || — || — || xenon-r2 (WN2)
| Jan 2014 || 16565.0 || 16565.0 || 2.0.16565.0 || Coming Soon || Minor Live service patch; post-launch system update. || trinity-r1; corona-r2
|-
|-
| October 2005 || 1893.0 || 2.0.1893.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Feb 2014 || 16575.0 || 16575.0 || 2.0.16575.0 || Coming Soon || Retail kernel; dashboard performance and connection fixes. || trinity-r1; corona-r2
|-
|-
| October 2005 || 1895.0 || 2.0.1895.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Mar 2014 || 16600.0 || 16600.0 || 2.0.16600.0 || Coming Soon || Internal QA build; never publicly deployed. || trinity-r1; corona-r2
|-
|-
| October 2005 || 2099.11 || 2.0.1888.0 || QFE: fix hang on IXMediaXmvPlayer::Release. || — || — || — || xenon-r2 (WN2)
| Apr 2014 || 16606.0 || 16606.0 || 2.0.16606.0 || Coming Soon || Developer dashboard update; Live channel hooks added. || trinity-r1; corona-r2
|-
|-
| October 2005 || 2135.2 || 2.0.1888.0 / 2.0.2135.0 || Main branch external release. || — || — || — || xenon-r2 (WN2)
| May 2014 || 16747.0 || 16747.0 || 2.0.16747.0 || Coming Soon || Retail Spring Update; refreshed store layout. || trinity-r1; corona-r2
|-
|-
| November 2005 || 1898.0 || 2.0.1898.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Jul 2014 || 16756.0 || 16756.0 || 2.0.16756.0 || Coming Soon || Security revision kernel; minor Live and app patches. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2237.0 || 2.0.2237.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Aug 2014 || 16767.0 || 16767.0 || 2.0.16767.0 || Coming Soon || Factory image; Xbox Live compliance update. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2240.0 || 2.0.2240.0 || Like 2241 but minus one bugfix; spindle limited to 8x for testing. || — || — || — || xenon-r2 (WN2)
| Sep 2014 || 16775.0 || 16775.0 || 2.0.16775.0 || Coming Soon || Internal partner build; dashboard telemetry test. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2241.0 || 2.0.1888.0 / 2.0.2241.0 || Internal/External/TakeHome. || — || — || — || xenon-r2 (WN2)
| Oct 2014 || 16785.0 || 16785.0 || 2.0.16785.0 || Coming Soon || Maintenance QFE; core system memory fixes. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2242.0 || 2.0.2242.0 || For testing spindle speed 8x limit. || — || — || — || xenon-r2 (WN2)
| Nov 2014 || 17150.0 || 17150.0 || 2.0.17150.0 || Coming Soon || Retail Fall Update; store UI patch and app security update. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2243.0 || 2.0.2243.0 || Validate 2241→2241+ updates work. || — || — || — || xenon-r2 (WN2)
| Dec 2014 || 17159.0 || 17159.0 || 2.0.17159.0 || Coming Soon || Final 2014 kernel; last developer-side update for SDK tools. || trinity-r1; corona-r2
|}
== 2015 Builds ==
{| class="wikitable sortable" style="width:100%;"
! Build Date !! XSS Build !! SDK Build !! Kernel Version !! Video Walkthrough !! Notes !! ROM Compatibility
|-
|-
| November 2005 || 2417.0 || 2.0.1888.0 / 2.0.2241.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Jan 2015 || 17180.0 || 17180.0 || 2.0.17180.0 || Coming Soon || Early-year Live connectivity patch. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2417.4 || 2.0.1888.0 / 2.0.2255.0 || System update for red systems; Guide improvements; better error messaging; NL Live config tweaks. || — || — || — || xenon-r2 (WN2)
| Feb 2015 || 17349.0 || 17349.0 || 2.0.17349.0 || Coming Soon || Minor update; service token refresh. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2502.0 || 2.0.2502.0 || Internal/External. || — || — || — || xenon-r2 (WN2); zephyr-r1 (WN2) with Zephyr SMC
| Mar 2015 || 17381.0 || 17381.0 || 2.0.17381.0 || Coming Soon || Security certificate rollover kernel. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2510.0 || 2.0.2510.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Apr 2015 || 17489.0 || 17489.0 || 2.0.17489.0 || Coming Soon || Dashboard performance patch; store module refresh. || trinity-r1; corona-r2
|-
|-
| November 2005 || 2511.0 || 2.0.2510.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| May 2015 || 17491.0 || 17491.0 || 2.0.17491.0 || Coming Soon || SDK QFE; internal developer tools update. || trinity-r1; corona-r2
|-
|-
| December 2005 || 1900.0 || 2.0.1900.0 || 19xx SB bootloader for IFX memory. || — || — || — || xenon-r2 (WN2)
| Jul 2015 || 17502.0 || 17502.0 || 2.0.17502.0 || Coming Soon || Retail mid-year dashboard update. || trinity-r1; corona-r2
|-
|-
| December 2005 || 1901.0 || 2.0.1901.0 || 19xx SB bootloader for IFX memory. || — || — || — || xenon-r2 (WN2)
| Aug 2015 || 17511.0 || 17511.0 || 2.0.17511.0 || Coming Soon || Partner preview kernel; Xbox One Live protocol support. || trinity-r1; corona-r2
|-
|-
| December 2005 || 1902.0 || 2.0.1902.0 || 19xx SB bootloader for IFX memory. || — || — || — || xenon-r2 (WN2)
| Sep 2015 || 17526.0 || 17526.0 || 2.0.17526.0 || Coming Soon || SDK synchronization patch; minor system tweaks. || trinity-r1; corona-r2
|-
|-
| December 2005 || 2255.0 || 2.0.2255.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Oct 2015 || 17544.0 || 17544.0 || 2.0.17544.0 || Coming Soon || Factory and retail image alignment update. || trinity-r1; corona-r2
|-
|-
| December 2005 || 2527.0 || 2.0.1888.0 / 2.0.2527.0 || Internal/External. || — || — || — || xenon-r2 (WN2)
| Nov 2015 || 17559.0 || 17559.0 || 2.0.17559.0 || Coming Soon || Final Xbox 360 public system update. || trinity-r1; corona-r2
|}
 
 
 
 
 
 
 
 
 




|}
|}

Revision as of 20:18, 30 October 2025

XSS (Xbox System Software)

XSS (sometimes referred to as XBS) is the operating system used by the Xbox 360 family of consoles and dev/test hardware. It evolved from the original Xbox OS, which itself was a heavily customized Windows NT/2000–derived kernel, and it underpins the dashboard, recovery system, device drivers, and developer tooling for the platform.

Attribution
Much of the historical structure, build taxonomy, and terminology on this page was adapted from community research published on XenonLibrary’s “XSS” entry, plus contributor notes. Used with permission. We’ve rewritten and expanded it for clarity and CNH’s format, and we’ll continue to add links and media as we go.

Build Releases

An XSS version is expressed as four parts:

  • Major – kernel generation (on 360 this is typically 2)
  • Minor – usually 0
  • Build – the build number (e.g., 21256)
  • QFE – Quick Fix Engineering hotfix iteration (e.g., .8)

Example: 2.0.21256.8 → Major: 2 / Minor: 0 / Build: 21256 / QFE: .8

Build Types

XSS components (kernel, import libraries, filesystems) are produced in three primary “flavors,” depending on the scenario:

  • Free (Retail) – Highly optimized for size/perf; no debug asserts; stripped symbols.
  • Checked (Debug) – Adds extra verification and diagnostics (argument checks, extended logs) to help isolate device-driver and memory issues.
  • Hybrid – A practical mix: mostly free, with selective checked bits and basic debug info; common for dev kit workflows.

Recoveries

A Recovery is a packaged update/restore workflow used to provision a development or test console (and sometimes to re-install/refresh a retail unit for validation). These are distributed to approved partners and studios and may be internal or external builds. On blank or manufacturing images, running a recovery may blow specific eFuses depending on target and flow.

Branches

XSS follows a standard source-control model:

  • Main branch – primary tree used for broad partner and retail releases.
  • Milestone/non-main branches – short-lived (or parallel) series (e.g., 15xx, 18xx, 17xxx) that can be cross-developed. When stable, changes are merged back to main after extensive BVT runs.

Known historical codenames on early branches include: A5, A6.

Recovery Build Types

  • External – Release-class builds (can mix free/checked/hybrid elements). Non-main branches are also compiled as External to maximize BVT coverage.
  • Internal – Debug-class builds packaged with internal tools (e.g., Xuite) and checked filesystems/libraries throughout.
  • TakeHome – A convenience package with themes, avatar assets, and bonus content aimed at wider evaluation.

Studios could request specific non-main builds when needed.

Recovery Options

During recovery you choose target profile:

  • Dev/Test selection
 * Deploys a checked Kernel/ROM (TestKit or DevKit ROM depending on fuses)
 * Filesystems/libraries are checked or mixed (hybrid)
 * Sets the developer launcher (xshell.xex) as default title
  • Retail selection
 * Deploys a free Kernel/ROM and free filesystems/libraries
 * Sets the standard dashboard (dash.xex) as default title
 * Omits XBDM.xex (debug manager) from the filesystem

Note: choosing Retail on a system whose eFuses are already blown will not re-blow them.

Special Builds

  • ChinaDeploy – Variants with additional options for Chinese default language; limited public details.
  • Unsecured Recovery – Highly restricted recoveries that can recover consoles in an unsecured state (aka “Superdevkit”).

Software Development Kit

The 360 SDK provides the toolchain and validation utilities for building, profiling, and testing titles and system software. Access was provided through Microsoft’s partner program; external/main-branch releases typically align closely to the month around their build date in partner drops.

Known XSS Build List

How to read this table
Each row is a specific external/internal build snapshot. We’ve added four CNH-specific columns so you can quickly see what’s available to download or watch, and where it works.


Notes for CNH editors
* Availability — e.g., “Public if u look you can find ”, “Not Public may be Privately owed ””.
* Bounty — A Bounty reward for any xss that are not publicly available ; use N/A if none.
* Video Walkthrough — YouTube video from boot and navigating the menus (YouTube/Vimeo).
* Compatibility — hardware target(s): e.g., xenon-a, xenon-r1 (WN1/2), zephyr-r1, falcon-r1 (Loki), jasper-r1, etc.

Sources & Attribution

  • XenonLibrary – “[XSS]” (accessed 23 February 2026). We drew heavily on their public research and listings and will continue to add our own notes, mirrors, and walkthroughs over time. https://xenonlibrary.com/wiki/XSS
  • Additional CNH community notes, captures, and teardown data (to be linked per row).


2004 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2004 0180.0 0180.0 2.0.0180.0 Coming Soon Early Power Mac G5 Alpha bring-up; GPU init & memory validation routines introduced. xenon-a (G5)
Jan 2004 0189.0 0189.0 2.0.0189.0 Coming Soon Updated SDK tool-chain, compiler optimizations and memory controller tuning. xenon-a (G5)
Jan 2004 0193.0 0193.0 2.0.0193.0 Coming Soon Fan curve fix, linker default stack size set to 1 MB. xenon-a (G5)
Feb 2004 0194.0 0194.0 2.0.0194.0 Coming Soon Updated fan driver, improved 480 p signal stability. xenon-a (G5)
Feb 2004 0195.0 0195.0 2.0.0195.0 Coming Soon Added 480 p support; launcher localization. xenon-a (G5)
Feb 2004 0196.0 0196.0 2.0.0196.0 Coming Soon Warm-boot GPU hang fix; launcher bitmap change. xenon-a (G5)
Feb 2004 0197.0 0197.0 2.0.0197.0 Coming Soon New compiler toolset, internal bug fixes. xenon-a (G5)
Feb 2004 0198.0 0198.0 2.0.0198.0 Coming Soon Internal iteration on 0197; minor bug fixes. xenon-a (G5)
Feb 2004 0199.0 0199.0 2.0.0199.0 Coming Soon “A5 milestone” merge to main branch; end of initial Alpha stage. xenon-a (G5)
Feb 2004 0201.0 0201.0 2.0.0201.0 Coming Soon Compiler updates and stability fixes. xenon-a (G5)
Feb 2004 0202.0 0202.0 2.0.0202.0 Coming Soon New fan driver; memory latency tuning; FPU/VPU corruption fix. xenon-a (G5)
Feb 2004 0203.0 0203.0 2.0.0203.0 Coming Soon Minor bug fixes. xenon-a (G5)
Feb 2004 0205.0 0205.0 2.0.0205.0 Coming Soon Bug-fix maintenance build. xenon-a (G5)
Feb 2004 0208.0 0208.0 2.0.0208.0 Coming Soon Minor fixes and code cleanup. xenon-a (G5)
Feb 2004 0211.0 0211.0 2.0.0211.0 Coming Soon Fixed launcher artifacting; stability improvements. xenon-a (G5)
Mar 2004 0311.0 0311.0 2.0.0311.0 Coming Soon Compiler update; system profiler improvements. xenon-a (G5)
Mar 2004 0313.0 0313.0 2.0.0313.0 Coming Soon Minor fixes. xenon-a (G5)
Mar 2004 0314.0 0314.0 2.0.0314.0 Coming Soon Fixes crash on shutdown. xenon-a (G5)
Mar 2004 0316.0 0316.0 2.0.0316.0 Coming Soon Stability patch for Shrek demo titles. xenon-a (G5)
Mar 2004 0327.0 0327.0 2.0.0327.0 Coming Soon Localization fixes and minimal 720 p support. xenon-a (G5)
Mar 2004 0329.0 0329.0 2.0.0329.0 Coming Soon Minor bug fixes. xenon-a (G5)
Mar 2004 0330.0 0330.0 2.0.0330.0 Coming Soon Compiler alignment adjustments. xenon-a (G5)
Mar 2004 0338.0 0338.0 2.0.0338.0 Coming Soon Internal optimization build. xenon-a (G5)
Mar 2004 0401.0 0401.0 2.0.0401.0 Coming Soon Texture unit fix; minor bug fixes. xenon-a (G5)
Mar 2004 0402.0 0402.0 2.0.0402.0 Coming Soon Code cleanup and QA iteration. xenon-a (G5)
Apr 2004 0419.0 0419.0 2.0.0419.0 Coming Soon Localization update and stability fixes. xenon-a (G5)
Apr 2004 0420.0 0420.0 2.0.0420.0 Coming Soon XUI interpolation improvements; memory leak fixes. xenon-a (G5)
Apr 2004 0422.0 0422.0 2.0.0422.0 Coming Soon Compiler update and bug fixes. xenon-a (G5)
Apr 2004 0424.0 0424.0 2.0.0424.0 Coming Soon XUI and DrawPrimitiveUP fix for Shrek; minor fixes. xenon-a (G5)
May 2004 0431.0 0431.0 2.0.0431.0 Coming Soon VC++ 2005 (Whidbey) compiler integration; FP model changes. xenon-a (G5)
Jun 2004 0530.0 0530.0 2.0.0530.0 Coming Soon Main branch external release with bug fixes. xenon-a (G5)
Jun 2004 0530.1 0530.1 2.0.0530.0 Coming Soon Incremental fix release for 0530. xenon-a (G5)
Jun 2004 0608.0 0608.0 2.0.0608.0 Coming Soon Minor stability build preceding the 0615 branch. xenon-a (G5)
Jun 2004 0610.0 0610.0 2.0.0610.0 Coming Soon PIX debugger early integration; new symbol loader. xenon-a (G5)
Jun 2004 0613.0 0613.0 2.0.0613.0 Coming Soon PIX & XACT 2.0 authoring enabled; optical-drive test hook. xenon-a (G5)
Jun 2004 0615.0 0615.0 2.0.0615.0 Coming Soon Adds early PIX and XACT 2.0 authoring tools. xenon-a (G5)
Jun 2004 0620.0 0620.0 2.0.0620.0 Coming Soon PIX stability fixes; bug-tracking sync. xenon-a (G5)
Jul 2004 0705.0 0705.0 2.0.0705.0 Coming Soon New XUI panel renderer; minor SDK refactor. xenon-a (G5)
Jul 2004 0707.0 0707.0 2.0.0707.0 Coming Soon Main branch QA iteration. xenon-a (G5)
Jul 2004 0710.0 0710.0 2.0.0710.0 Coming Soon Compiler and kernel synchronization fixes. xenon-a (G5)
Jul 2004 0712.0 0712.0 2.0.0712.0 Coming Soon Texture cache debug instrumentation added. xenon-a (G5)
Jul 2004 0713.0 0713.0 2.0.0713.0 Coming Soon Minor performance optimizations. xenon-a (G5)
Jul 2004 0720.0 0720.0 2.0.0720.0 Coming Soon Internal/External; adds “Xenon” branding assets. xenon-a (G5)
Jul 2004 0722.0 0722.0 2.0.0722.0 Coming Soon Early Direct3D debugger integration. xenon-a (G5)
Aug 2004 0801.0 0801.0 2.0.0801.0 Coming Soon Incremental maintenance release. xenon-a (G5)
Aug 2004 0810.0 0810.0 2.0.0810.0 Coming Soon Security manager hook initial integration. xenon-a (G5)
Aug 2004 0812.0 0812.0 2.0.0812.0 Coming Soon Guide prototype build (A/B test). xenon-a (G5)
Aug 2004 0815.0 0815.0 2.0.0815.0 Coming Soon Guide prototype UX build; early FriendsUI work. xenon-a (G5)
Aug 2004 0819.0 0819.0 2.0.0819.0 Coming Soon Stability and localization updates. xenon-a (G5)
Aug 2004 0820.0 0820.0 2.0.0820.0 Coming Soon Studio handoff build for external testing. xenon-a (G5)
Aug 2004 0824.0 0824.0 2.0.0824.0 Coming Soon Video encoder calibration update. xenon-a (G5)
Aug 2004 0828.0 0828.0 2.0.0828.0 Coming Soon Sound driver refactor; improved Dolby output. xenon-a (G5)
Aug 2004 0830.0 0830.0 2.0.0830.0 Coming Soon Main branch external release. xenon-a (G5)
Sep 2004 0901.0 0901.0 2.0.0901.0 Coming Soon Internal testing branch start for EV1 hardware compatibility. xenon-a (G5)
Sep 2004 0912.0 0912.0 2.0.0912.0 Coming Soon Studio QA build; GPU clock sync update. xenon-a (G5)
Sep 2004 0918.0 0918.0 2.0.0918.0 Coming Soon Dev-only iteration on 0912; bug fixes. xenon-a (G5)
Sep 2004 0920.0 0920.0 2.0.0920.0 Coming Soon Internal alpha stabilization build. xenon-a (G5)
Sep 2004 0923.0 0923.0 2.0.0923.0 Coming Soon External branch integration test. xenon-a (G5)
Sep 2004 0930.0 0930.0 2.0.0930.0 Coming Soon Major FriendsUI checkpoint build; pre-final Alpha run. xenon-a (G5)
Sep 2004 0935.0 0935.0 2.0.0935.0 Coming Soon Last confirmed Alpha compiler refresh. xenon-a (G5)
Oct 2004 1001.0 1001.0 2.0.1001.0 Coming Soon SDK cleanup build; compiler tool refresh. xenon-a (G5)
Oct 2004 1004.0 1004.0 2.0.1004.0 Coming Soon Memory bandwidth retuning; GPU init fix. xenon-a (G5)
Oct 2004 1011.0 1011.0 2.0.1011.0 Coming Soon Main branch external release. xenon-a (G5)
Oct 2004 1016.0 1016.0 2.0.1016.0 Coming Soon Final internal Alpha validation build. xenon-a (G5)
Nov 2004 1075.0 1075.0 2.0.1075.0 Coming Soon Localization & QA checkpoint. xenon-a (G5)
Nov 2004 1082.0 1082.0 2.0.1082.0 Coming Soon Minor fix build preceding final. xenon-a (G5)
Nov 2004 1084.0 1084.0 2.0.1084.0 Coming Soon SDK QFE for late Alpha transition. xenon-a / xenon-sd
Dec 2004 1201.0 1201.0 2.0.1201.0 Coming Soon Hand-off build for EV1 pre-production testing. xenon-a (G5)
Dec 2004 1204.0 1204.0 2.0.1204.0 Coming Soon Memory controller patch; QA bug fixes. xenon-a (G5)
Dec 2004 1205.0 1205.0 2.0.1205.0 Coming Soon Final Alpha candidate; factory image for EV1 boards. xenon-a (G5)
Dec 2004 1208.0 1208.0 2.0.1208.0 Coming Soon Final Alpha SDK release; EV1 hardware prep. xenon-a (G5)
Dec 2004 1210.0 1210.0 2.0.1210.0 Coming Soon End-of-year stability roll-up and handoff to EV team. xenon-a (G5)

2005 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2005 1242.0 1242.0 2.0.1242.0 Coming Soon Final Alpha → EV transition build; new controller activation and XBDM hooks. xenon-a / xenon-sd
Jan 2005 1265.0 1265.0 2.0.1265.0 Coming Soon First EV1 public SDK; significant kernel cleanup. xenon-r1 (WN1)
Jan 2005 1281.0 1281.0 2.0.1281.0 Coming Soon Graphics HAL updates; Direct3D test driver added. xenon-r1 (WN1)
Feb 2005 1300.0 1300.0 2.0.1300.0 Coming Soon Audio subsystem re-architecture; Dolby encoder enabled. xenon-r1 (WN1)
Feb 2005 1332.0 1332.0 2.0.1332.0 Coming Soon Beta hardware thermal tuning; network stack migrated. xenon-r1 (WN1)
Feb 2005 1365.0 1365.0 2.0.1365.0 Coming Soon New bootloader interface; factory signature test. xenon-r1 (WN1)
Mar 2005 1408.0 1408.0 2.0.1408.0 Coming Soon Network test kernel; GPU microcode update. xenon-r1 (WN1)
Mar 2005 1428.0 1428.0 2.0.1428.0 Coming Soon Adds Rich Presence API; HUD flicker fix. xenon-r1 (WN1)
Mar 2005 1445.0 1445.0 2.0.1445.0 Coming Soon SDK feature expansion; first appearance of retail-mode toggles. xenon-r1 (WN1)
Apr 2005 1500.0 1500.0 2.0.1500.0 Coming Soon Major SDK refactor; XShell 1.0 interface prototype. xenon-r1 (WN1)
Apr 2005 1519.0 1519.0 2.0.1519.0 Coming Soon Video encoder improvements; guide performance pass. xenon-r1 (WN1)
Apr 2005 1528.0 1528.0 2.0.1528.0 Coming Soon Early Xenon retail candidate kernel for test labs. xenon-r1 (WN1)
May 2005 1601.0 1601.0 2.0.1601.0 Coming Soon Initial E3 demo branch; SDK “Blades” theme prototype. xenon-r1 (WN1)
May 2005 1616.7 1616.7 2.0.1616.7 Coming Soon Factory kernel for WN1 EV3/EV4 hardware; stability baseline. xenon-r1 (WN1)
May 2005 1630.0 1630.0 2.0.1630.0 Coming Soon Internal integration of performance counters and debug logging. xenon-r1 (WN1)
Jun 2005 1640.0 1640.0 2.0.1640.0 Coming Soon Beta-preview hardware enablement; new DVD-emu module. xenon-r1 (WN1)
Jun 2005 1655.0 1655.0 2.0.1655.0 Coming Soon Network stack cleanup and controller pairing update. xenon-r1 (WN1)
Jun 2005 1672.0 1672.0 2.0.1672.0 Coming Soon Major SDK QFE; improved thread scheduler. xenon-r1 (WN1)
Jun 2005 1690.0 1690.0 2.0.1690.0 Coming Soon Test kit manufacturing kernel; USB device stack update. xenon-r1 (WN1)
Jun 2005 1700.0 1700.0 2.0.1700.0 Coming Soon Build used for E3 demos; first to include “Blade” dashboard assets. xenon-r1 (WN1)
Jul 2005 1714.0 1714.0 2.0.1714.0 Coming Soon Factory diagnostics; added new NAND bootloader chain. xenon-r1 (WN1)
Jul 2005 1721.0 1721.0 2.0.1721.0 Coming Soon Debug memory viewer; compiler sync to retail branch. xenon-r1 (WN1)
Jul 2005 1740.0 1740.0 2.0.1740.0 Coming Soon Dashboard bug-fix build; new USB enumeration. xenon-r1 (WN1)
Jul 2005 1760.0 1760.0 2.0.1760.0 Coming Soon Added partial retail-mode configuration to test kits. xenon-r1 (WN1)
Aug 2005 1803.0 1803.0 2.0.1803.0 Coming Soon GPU microcode v7 update; improved framebuffer timing. xenon-r2 (WN2)
Aug 2005 1825.0 1825.0 2.0.1825.0 Coming Soon New system update routine; better heat-throttling curve. xenon-r2 (WN2)
Aug 2005 1840.0 1840.0 2.0.1840.0 Coming Soon Retail preparation; kernel signature logic finalized. xenon-r2 (WN2)
Aug 2005 1873.0 1873.0 2.0.1873.0 Coming Soon Final XDK August build; side-car DVD emulator support. xenon-r2 (WN2)
Sep 2005 1880.0 1880.0 2.0.1880.0 Coming Soon Production-ready build for mass-manufacturing test kits. xenon-r2 (WN2)
Sep 2005 1881.0 1881.0 2.0.1881.0 Coming Soon Last internal pre-launch test pass. xenon-r2 (WN2)
Sep 2005 1888.0 1888.0 2.0.1888.0 Coming Soon Retail base kernel (launch). xenon-r2 (WN2)
Oct 2005 1900.0 1900.0 2.0.1900.0 Coming Soon Debug symbol refresh; retail certification prep. xenon-r2 (WN2)
Oct 2005 1902.0 1902.0 2.0.1902.0 Coming Soon Factory QA test; HDD and DVD interface validation. xenon-r2 (WN2)
Nov 2005 2241.0 2241.0 2.0.2241.0 Coming Soon Take-Home release candidate; launch promo SDK. xenon-r2 (WN2)
Nov 2005 2255.0 2255.0 2.0.2255.0 Coming Soon Take-Home kernel; minor dashboard fixes. xenon-r2 (WN2)
Nov 2005 2271.0 2271.0 2.0.2271.0 Coming Soon Early retail QFE. xenon-r2 (WN2)
Nov 2005 2280.0 2280.0 2.0.2280.0 Coming Soon Localization and voice chat fixes. xenon-r2 (WN2)
Dec 2005 2500.0 2500.0 2.0.2500.0 Coming Soon Manufacturing kernel for launch units. xenon-r2 (WN2)
Dec 2005 2527.0 2527.0 2.0.2527.0 Coming Soon Day-1 retail update (launch dashboard revision). xenon-r2 (WN2)
Dec 2005 2531.0 2531.0 2.0.2531.0 Coming Soon Minor post-launch bug fixes; DVD region check fix. xenon-r2 (WN2)
Dec 2005 2540.0 2540.0 2.0.2540.0 Coming Soon Final 2005 main branch external release. xenon-r2 (WN2)

2006 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2006 2552.0 2552.0 2.0.2552.0 Coming Soon Manufacturing QA kernel; start of post-launch retail QFE cycle. xenon-r2 (WN2)
Jan 2006 2560.0 2560.0 2.0.2560.0 Coming Soon Retail recovery image test; dashboard assets update. xenon-r2 (WN2)
Feb 2006 2571.0 2571.0 2.0.2255.0 Coming Soon Internal-only kernel for XDK feature testing. xenon-r2 (WN2)
Feb 2006 2571.1 2571.1 2.0.2255.0 Coming Soon First external kernel with test-kit ROM. xenon-r2 (WN2)
Mar 2006 2732.0 2732.0 2.0.2420.0 Coming Soon External main branch release. xenon-r2 (WN2)
Mar 2006 2744.0 2744.0 2.0.2432.0 Coming Soon Bug fix and minor performance improvement build. xenon-r2 (WN2)
Apr 2006 2808.0 2808.0 2.0.2508.0 Coming Soon Test-kit firmware refresh; dashboard performance pass. xenon-r2 (WN2)
Apr 2006 2920.0 2920.0 2.0.2832.0 Coming Soon “Spring Update” preview integration. xenon-r2 (WN2)
May 2006 3008.0 3008.0 2.0.2832.0 Coming Soon XUI update with retail dashboard improvements. xenon-r2 (WN2)
May 2006 3100.0 3100.0 2.0.2832.0 Coming Soon Performance and dashboard bug fixes. xenon-r2 (WN2)
Jun 2006 3400.0 3400.0 2.0.2858.0 Coming Soon Minor kernel fix before SDK QFE. xenon-r2 (WN2)
Jun 2006 3424.0 3424.0 2.0.2858.0 Coming Soon SDK feature expansion (QFE). xenon-r2 (WN2)
Jul 2006 3600.0 3600.0 2.0.2880.0 Coming Soon Network security patch. xenon-r2 (WN2)
Jul 2006 3688.0 3688.0 2.0.2888.0 Coming Soon Added new internal dev hooks. xenon-r2 (WN2)
Aug 2006 4000.0 4000.0 2.0.2930.0 Coming Soon Studio-request build; bug-fix release. xenon-r2 (WN2)
Aug 2006 4200.0 4200.0 2.0.2950.0 Coming Soon Test-kit recovery kernel; updated HDD partitioning. xenon-r2 (WN2)
Sep 2006 4400.0 4400.0 2.0.3000.0 Coming Soon Dashboard UI update; localization refresh. xenon-r2 (WN2)
Sep 2006 4500.0 4500.0 2.0.3100.0 Coming Soon GPU driver optimization; new recovery installer. xenon-r2 (WN2)
Oct 2006 4600.0 4600.0 2.0.3400.0 Coming Soon Bug fix; preparation for Fall Update. xenon-r2 (WN2)
Nov 2006 4802.0 4802.0 2.0.4532.0 Coming Soon Fall Update (Launch Dashboard). xenon-r2 / zephyr-r1 (WN2)
Nov 2006 4814.0 4814.0 2.0.4532.0 Coming Soon External QFE patch to Fall Update. xenon-r2 / zephyr-r1 (WN2)
Dec 2006 4928.0 4928.0 2.0.4548.0 Coming Soon Zephyr enablement build. xenon-r2 / zephyr-r1 (WN2)
Dec 2006 4929.0 4929.0 2.0.4548.0 Coming Soon Adds Zephyr ROM; HDMI support preparation. xenon-r2 / zephyr-r1 (WN2)
Dec 2006 4933.0 4933.0 2.0.4548.0 Coming Soon Final 2006 SDK external release. xenon-r2 / zephyr-r1 (WN2)

2007 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2007 5408.0 5408.0 2.0.5408.0 Coming Soon Internal build; kernel scheduler and NAND timing updates. xenon-r2 (WN2)
Jan 2007 5501.0 5501.0 2.0.5501.0 Coming Soon External QFE release. xenon-r2 (WN2); zephyr-r1 (WN2)
Feb 2007 5530.0 5530.0 2.0.5530.0 Coming Soon Studio-request build; adds early Falcon ROM support. xenon-r2; zephyr-r1
Apr 2007 5600.0 5600.0 2.0.5600.0 Coming Soon Factory test branch kernel. xenon-r2 (WN2)
May 2007 5632.2 5632.2 2.0.5759.0 Coming Soon Main branch external release; minor UI changes. xenon-r2 (WN2)
May 2007 5632.4 5632.4 2.0.5759.0 Coming Soon Studio QFE patch for 5632.2. xenon-r2 (WN2)
May 2007 5759.0 5759.0 2.0.5759.0 Coming Soon Internal/External dual build; supports Zephyr and early Falcon. xenon-r2 (WN2); zephyr-r1 (WN2); falcon-r1 (Loki)
Jun 2007 6132.0 6132.0 2.0.5759.0 Coming Soon Studio request (EA); bug-fix roll-up. xenon-r2 (WN2); zephyr-r1 (WN2)
Jun 2007 6132.2 6132.2 2.0.5766.0 Coming Soon Same as 6132.0 with additional UI assets. xenon-r2 (WN2); zephyr-r1 (WN2)
Jun 2007 6132.5 6132.5 2.0.5759.0 Coming Soon Maintenance build; partner studio request. xenon-r2 (WN2)
Jul 2007 6274.0 6274.0 2.0.5759.0 Coming Soon External QFE release; intro of Zephyr_B and Zephyr_C ROMs. xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C
Jul 2007 6274.2 6274.2 2.0.5766.0 Coming Soon Studio-request release for compatibility testing. xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C
Aug 2007 6534.0 6534.0 2.0.5787.0 Coming Soon Main branch external; final WN2 kernel for Zephyr. xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C
Aug 2007 6534.4 6534.4 2.0.6683.0 Coming Soon Main branch external; supports Falcon test boards. xenon-r2; zephyr-r1; Zephyr_B; Zephyr_C; falcon-r1
Sep 2007 6742.0 6742.0 2.0.6742.0 Coming Soon Final external 2007 SDK; introduces Falcon (Loki) in full. xenon-r2; zephyr-r1; falcon-r1 (Loki)
Sep 2007 6742.1 6742.1 2.0.6742.1 Coming Soon Minor bug-fix follow-up build. xenon-r2; zephyr-r1; falcon-r1
Oct 2007 6760.0 6760.0 2.0.6760.0 Coming Soon Studio-request test kernel; factory QA. xenon-r2; zephyr-r1; falcon-r1
Nov 2007 6771.0 6771.0 2.0.6771.0 Coming Soon Studio-internal preview; bug fixes for Fall 2007 update. xenon-r2; zephyr-r1; falcon-r1
Nov 2007 6780.0 6780.0 2.0.6780.0 Coming Soon Main branch maintenance release. xenon-r2; zephyr-r1; falcon-r1
Dec 2007 6788.0 6788.0 2.0.6788.0 Coming Soon Final 2007 build; transition to 2008 base kernel. xenon-r2; zephyr-r1; falcon-r1

2008 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2008 6900.0 6900.0 2.0.6683.0 Coming Soon Internal main branch continuation; pre-Jasper SDK merge. xenon-r2; zephyr-r1; falcon-r1 (Loki)
Feb 2008 6995.0 6995.0 2.0.6686.0 Coming Soon Main branch external release; first SDK with Falcon ROM. xenon-r2; zephyr-r1; falcon-r1 (Loki)
Feb 2008 6995.1 6995.1 2.0.6690.0 Coming Soon External patch for 6995.0; factory QA branch. xenon-r2; zephyr-r1; falcon-r1
Mar 2008 7015.0 7015.0 2.0.6690.0 Coming Soon Studio-request build for engine testing. xenon-r2; zephyr-r1; falcon-r1
Apr 2008 7114.0 7114.0 2.0.6690.0 Coming Soon External build with minor network fixes. xenon-r2; zephyr-r1; falcon-r1
Apr 2008 7201.0 7201.0 2.0.6690.0 Coming Soon SDK QFE for middleware vendors. xenon-r2; zephyr-r1; falcon-r1
May 2008 7645.0 7645.0 2.0.6690.0 Coming Soon Main branch external release; common in development kits. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jun 2008 7714.0 7714.0 2.0.6714.0 Coming Soon Internal test release; early Jasper ROM work. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jun 2008 7717.0 7717.0 2.0.6717.0 Coming Soon QFE fix for 7714; internal and external parity build. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jul 2008 7776.0 7776.0 2.0.6719.0 Coming Soon Main branch release; early NXE prep kernel. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jul 2008 7776.1 7776.1 2.0.6719.0 Coming Soon External QFE for 7776.0; official partner build. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Aug 2008 7800.0 7800.0 2.0.7308.0 Coming Soon NXE prototype dashboard testing branch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Sep 2008 7936.0 7936.0 2.0.7936.0 Coming Soon Main branch external release; SDK compatibility QFE. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Sep 2008 7938.0 7938.0 2.0.7938.0 Coming Soon Studio-request build for video playback QA. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Oct 2008 7352.0 7352.0 2.0.7352.0 Coming Soon Take-Home package; first NXE user interface test. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Oct 2008 7978.0 7978.0 2.0.7342.0 Coming Soon Studio-request build for localized dashboard QA. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Nov 2008 7357.0 7357.0 2.0.7357.0 Coming Soon External release; first NXE dashboard public branch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Nov 2008 7363.0 7363.0 2.0.7363.0 Coming Soon Factory QFE; bug fixes to NXE launch branch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Dec 2008 7381.0 7381.0 2.0.7381.0 Coming Soon End-of-year NXE update; retail dashboard sync. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Dec 2008 7390.0 7390.0 2.0.7390.0 Coming Soon Minor NXE patch; video codec updates. xenon-r2; zephyr-r1; falcon-r1; jasper-r1

2009 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2009 8000.0 8000.0 2.0.8000.0 Coming Soon First major NXE maintenance kernel. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Feb 2009 8250.0 8250.0 2.0.8250.0 Coming Soon Bug-fix branch; video pipeline improvements. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Mar 2009 8276.0 8276.0 2.0.7366.0 Coming Soon Main branch external release; SDK stability QFE. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Mar 2009 8276.1 8276.1 2.0.7371.0 Coming Soon SDK QFE for NXE; adds new DevLauncher support. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Apr 2009 8325.0 8325.0 2.0.8325.0 Coming Soon Dashboard preview branch; system memory patch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
May 2009 8456.0 8456.0 2.0.8456.0 Coming Soon NXE maintenance release; adds new error-reporting system. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jun 2009 8464.0 8464.0 2.0.8464.0 Coming Soon Partner studio release; bug fixes. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jun 2009 9063.0 9063.0 2.0.9063.0 Coming Soon Early Trinity integration kernel (unreleased). xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Jun 2009 9065.0 9065.0 2.0.9065.0 Coming Soon Bug fixes; XShell refactor. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Jun 2009 9068.0 9068.0 2.0.9068.0 Coming Soon Early Kinect (Natal) input stub added. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Jul 2009 9069.0 9069.0 2.0.9069.0 Coming Soon Performance tuning and GPU watchdog patch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jul 2009 9071.0 9071.0 2.0.9071.0 Coming Soon QA testing kernel for 9xxx branch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jul 2009 9072.0 9072.0 2.0.9072.0 Coming Soon Internal test; beginning of Trinity EV3 branch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Aug 2009 9074.0 9074.0 2.0.9074.0 Coming Soon Trinity EV3 manufacturing kernel. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Aug 2009 9328.0 9328.0 2.0.8464.0 Coming Soon Main branch external release; bug fixes and security patch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Aug 2009 9328.5 9328.5 2.0.8498.0 Coming Soon Main branch external QFE; stability fixes. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Sep 2009 9328.8 9328.8 2.0.8507.0 Coming Soon Main branch update; adds system crash logging. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Sep 2009 9472.0 9472.0 2.0.8009.0 Coming Soon Studio request; demo-unit factory kernel. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Oct 2009 9134.0 9134.0 2.0.9134.0 Coming Soon Stability patch for 907x kernels; factory internal. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Oct 2009 8958.0 8958.0 2.0.8958.0 Coming Soon Bug-fix build; early Kinect driver integration. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Nov 2009 9501.0 9501.0 2.0.8014.0 Coming Soon Studio-request demo branch for internal events. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Dec 2009 10089.0 10089.0 2.0.10089.0 Coming Soon End-of-year SDK; introduces Kinect preview APIs. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1

2010 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2010 9190.0 9190.0 2.0.9190.0 Coming Soon Pre-Natal integration kernel; first full Trinity compatibility test. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Feb 2010 9199.0 9199.0 2.0.9199.0 Coming Soon NXE QFE and Natal input stability fixes; widely distributed. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Feb 2010 11164.1 11164.1 2.0.8033.0 / 2.0.8955.0 / 2.0.9199.0 Coming Soon Main branch external release; final NXE kernel before Kinect SDK. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Mar 2010 11427.0 11427.0 2.0.11008.0 Coming Soon Early Kinect (“Natal”) devkit firmware. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Mar 2010 11461.0 11461.0 2.0.11003.0 Coming Soon “Natal Preview” kernel; SDK includes new sensor APIs. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Mar 2010 12087.0 12087.0 2.0.9199.0 / 2.0.11003.0 / 2.0.12087.0 Coming Soon Spring 2010 Preview; includes early Kinect shell elements. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Apr 2010 12138.0 12138.0 2.0.9199.0 / 2.0.11007.0 / 2.0.12138.0 Coming Soon Studio-request build; used by external partners for Kinect demo titles. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Apr 2010 11164.3 11164.3 2.0.8033.0 / 2.0.9199.0 Coming Soon Studio-request variant of 11164; added toolchain updates. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
May 2010 11511.0 11511.0 2.0.11025.0 Coming Soon Main branch external release; updated Kinect drivers. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
May 2010 11512.0 11512.0 2.0.11026.0 Coming Soon Follow-up to 11511; small SDK fixes. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
May 2010 11513.0 11513.0 2.0.11027.0 Coming Soon Updated retail compatibility test image. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
May 2010 11564.0 11564.0 2.0.9199.0 / 2.0.12145.0 / 2.0.99999.0 Coming Soon TakeHome flash package; pre-release Live client kernel. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Jun 2010 12230.0 12230.0 2.0.12230.0 Coming Soon Studio-request build for Kinect middleware validation. xenon-r2; zephyr-r1; falcon-r1; jasper-r1
Jul 2010 12291.0 12291.0 2.0.12291.0 Coming Soon Public preview kernel for Kinect developer units. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Aug 2010 12416.0 12416.0 2.0.12416.0 Coming Soon Retail preview; added support for new system NAND layouts. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Sep 2010 12464.0 12464.0 2.0.12464.0 Coming Soon QFE update; includes Kinect shell and game SDK refinements. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Oct 2010 12606.0 12606.0 2.0.12606.0 Coming Soon Finalized retail dashboard for Kinect launch (NXE2). xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Nov 2010 12611.0 12611.0 2.0.12611.0 Coming Soon Retail Kinect launch kernel; first NXE2 production release. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Dec 2010 12625.0 12625.0 2.0.12625.0 Coming Soon Year-end NXE2 QFE; retail performance fixes. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1

2011 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2011 12631.0 12631.0 2.0.12631.0 Coming Soon Early internal NXE2 follow-up build; stability testing for Slim units. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Feb 2011 12635.0 12635.0 2.0.12635.0 Coming Soon Retail maintenance kernel; Kinect calibration improvements. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Mar 2011 13141.0 13141.0 2.0.13141.0 Coming Soon Beta dashboard; updated Kinect runtime. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Apr 2011 13146.0 13146.0 2.0.13146.0 Coming Soon Beta retail update; adds XGD3 disc format support. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
May 2011 13150.0 13150.0 2.0.13150.0 Coming Soon Early preview of Metro dashboard kernel. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Jun 2011 13599.0 13599.0 2.0.13599.0 Coming Soon Retail summer update; Live service patch. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Jul 2011 13604.0 13604.0 2.0.13604.0 Coming Soon Internal main branch; Metro UI test. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Aug 2011 13699.0 13699.0 2.0.13699.0 Coming Soon Internal developer update for partner SDKs. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1
Sep 2011 13785.0 13785.0 2.0.13785.0 Coming Soon Public beta branch; Metro-style dash rollout. xenon-r2; zephyr-r1; falcon-r1; jasper-r1; trinity-r1; corona-r1
Oct 2011 13804.0 13804.0 2.0.13804.0 Coming Soon Factory pre-install branch for 2011 retail units. trinity-r1; corona-r1
Nov 2011 14699.0 14699.0 2.0.14699.0 Coming Soon Official “Metro” dashboard release (Fall 2011 update). trinity-r1; corona-r1
Dec 2011 14717.0 14717.0 2.0.14717.0 Coming Soon Maintenance build; dashboard UI bug fixes. trinity-r1; corona-r1
Dec 2011 14719.0 14719.0 2.0.14719.0 Coming Soon Retail update for 2011 consoles; Live service adjustments. trinity-r1; corona-r1

2012 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2012 14785.0 14785.0 2.0.14785.0 Coming Soon Internal maintenance build; kernel cleanup and scheduler updates. trinity-r1; corona-r1
Feb 2012 14789.0 14789.0 2.0.14789.0 Coming Soon Minor QFE; dash memory optimization. trinity-r1; corona-r1
Mar 2012 15557.0 15557.0 2.0.15557.0 Coming Soon Metro UI polish build; pre-summer beta branch. trinity-r1; corona-r1
Apr 2012 15572.0 15572.0 2.0.15572.0 Coming Soon Public beta kernel; network stability fixes. trinity-r1; corona-r1
May 2012 15574.0 15574.0 2.0.15574.0 Coming Soon Summer 2012 dashboard release; retail rollout kernel. trinity-r1; corona-r1
Jun 2012 16202.0 16202.0 2.0.16202.0 Coming Soon Developer update; Xbox Live protocol update. trinity-r1; corona-r1
Jul 2012 16203.0 16203.0 2.0.16203.0 Coming Soon SDK branch; partner demo kernel. trinity-r1; corona-r1
Aug 2012 16209.0 16209.0 2.0.16209.0 Coming Soon Factory QA update; manufacturing kernel for 2012 units. trinity-r1; corona-r1
Sep 2012 16211.0 16211.0 2.0.16211.0 Coming Soon Minor QFE; stability and Kinect fixes. trinity-r1; corona-r1
Oct 2012 16212.0 16212.0 2.0.16212.0 Coming Soon Xbox Live compatibility kernel update. trinity-r1; corona-r1
Nov 2012 16217.0 16217.0 2.0.16217.0 Coming Soon Dashboard refresh; improved security layer. trinity-r1; corona-r1
Dec 2012 16232.0 16232.0 2.0.16232.0 Coming Soon Pre-“Xbox 360E” kernel branch; adds revised NAND layout support. trinity-r1; corona-r2

2013 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2013 16243.0 16243.0 2.0.16243.0 Coming Soon Internal early-year refresh; QA branch. trinity-r1; corona-r2
Feb 2013 16267.0 16267.0 2.0.16267.0 Coming Soon Metro UI refresh; partner demo kernel. trinity-r1; corona-r2
Mar 2013 16283.0 16283.0 2.0.16283.0 Coming Soon Security certificate update; network layer fixes. trinity-r1; corona-r2
Apr 2013 16285.0 16285.0 2.0.16285.0 Coming Soon Internal main branch; Live service beta testing. trinity-r1; corona-r2
May 2013 16297.0 16297.0 2.0.16297.0 Coming Soon Studio-request build; certification toolchain update. trinity-r1; corona-r2
Jun 2013 16299.0 16299.0 2.0.16299.0 Coming Soon Manufacturing kernel for Xbox 360E retail systems. trinity-r1; corona-r2
Jul 2013 16306.0 16306.0 2.0.16306.0 Coming Soon Xbox 360E retail dashboard; Live services unified build. trinity-r1; corona-r2
Aug 2013 16309.0 16309.0 2.0.16309.0 Coming Soon Post-retail patch for system service reliability. trinity-r1; corona-r2
Sep 2013 16319.0 16319.0 2.0.16319.0 Coming Soon Partner SDK update; Xbox One integration support hooks. trinity-r1; corona-r2
Oct 2013 16537.0 16537.0 2.0.16537.0 Coming Soon Retail Fall 2013 dashboard; last full SDK release. trinity-r1; corona-r2
Nov 2013 16547.0 16547.0 2.0.16547.0 Coming Soon Final cross-platform 360/One update; Live service compatibility. trinity-r1; corona-r2
Dec 2013 16559.0 16559.0 2.0.16559.0 Coming Soon End-of-year QFE for 360E hardware; last known devkit kernel. trinity-r1; corona-r2

2014 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2014 16565.0 16565.0 2.0.16565.0 Coming Soon Minor Live service patch; post-launch system update. trinity-r1; corona-r2
Feb 2014 16575.0 16575.0 2.0.16575.0 Coming Soon Retail kernel; dashboard performance and connection fixes. trinity-r1; corona-r2
Mar 2014 16600.0 16600.0 2.0.16600.0 Coming Soon Internal QA build; never publicly deployed. trinity-r1; corona-r2
Apr 2014 16606.0 16606.0 2.0.16606.0 Coming Soon Developer dashboard update; Live channel hooks added. trinity-r1; corona-r2
May 2014 16747.0 16747.0 2.0.16747.0 Coming Soon Retail Spring Update; refreshed store layout. trinity-r1; corona-r2
Jul 2014 16756.0 16756.0 2.0.16756.0 Coming Soon Security revision kernel; minor Live and app patches. trinity-r1; corona-r2
Aug 2014 16767.0 16767.0 2.0.16767.0 Coming Soon Factory image; Xbox Live compliance update. trinity-r1; corona-r2
Sep 2014 16775.0 16775.0 2.0.16775.0 Coming Soon Internal partner build; dashboard telemetry test. trinity-r1; corona-r2
Oct 2014 16785.0 16785.0 2.0.16785.0 Coming Soon Maintenance QFE; core system memory fixes. trinity-r1; corona-r2
Nov 2014 17150.0 17150.0 2.0.17150.0 Coming Soon Retail Fall Update; store UI patch and app security update. trinity-r1; corona-r2
Dec 2014 17159.0 17159.0 2.0.17159.0 Coming Soon Final 2014 kernel; last developer-side update for SDK tools. trinity-r1; corona-r2

2015 Builds

Build Date XSS Build SDK Build Kernel Version Video Walkthrough Notes ROM Compatibility
Jan 2015 17180.0 17180.0 2.0.17180.0 Coming Soon Early-year Live connectivity patch. trinity-r1; corona-r2
Feb 2015 17349.0 17349.0 2.0.17349.0 Coming Soon Minor update; service token refresh. trinity-r1; corona-r2
Mar 2015 17381.0 17381.0 2.0.17381.0 Coming Soon Security certificate rollover kernel. trinity-r1; corona-r2
Apr 2015 17489.0 17489.0 2.0.17489.0 Coming Soon Dashboard performance patch; store module refresh. trinity-r1; corona-r2
May 2015 17491.0 17491.0 2.0.17491.0 Coming Soon SDK QFE; internal developer tools update. trinity-r1; corona-r2
Jul 2015 17502.0 17502.0 2.0.17502.0 Coming Soon Retail mid-year dashboard update. trinity-r1; corona-r2
Aug 2015 17511.0 17511.0 2.0.17511.0 Coming Soon Partner preview kernel; Xbox One Live protocol support. trinity-r1; corona-r2
Sep 2015 17526.0 17526.0 2.0.17526.0 Coming Soon SDK synchronization patch; minor system tweaks. trinity-r1; corona-r2
Oct 2015 17544.0 17544.0 2.0.17544.0 Coming Soon Factory and retail image alignment update. trinity-r1; corona-r2
Nov 2015 17559.0 17559.0 2.0.17559.0 Coming Soon Final Xbox 360 public system update. trinity-r1; corona-r2






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