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Created page with "== Known XSS Build List == ; Built from XenonLibrary data (used with permission). Extra columns added for CNH. {| class="wikitable sortable" ! Build Date !! XSS/SDK Build !! Kernel !! Notes !! Availability !! Download Link !! Video Walkthrough !! Compatibility <!-- ========== 2004 ========== --> |- ! colspan="8" | '''2004''' |- | January 2004 || 0180.0 || 2.0.0180.0 || Internal/External. || — || — || — || xenon-a (Power Mac G5) |- | January 2004 || 0189.0 || 2.0.0..." |
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= 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 {{CURRENTDAY}} {{CURRENTMONTHNAME}} {{CURRENTYEAR}}). 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). | |||
== Known XSS Build List == | == Known XSS Build List == | ||
; Built from XenonLibrary data (used with permission). Extra columns added for CNH. | ; Built from XenonLibrary data (used with permission). Extra columns added for CNH. | ||
{| class="wikitable sortable" | {| class="wikitable sortable" | ||
! Build Date !! XSS/SDK Build !! Kernel !! Notes !! Availability !! | ! Build Date !! XSS/SDK Build !! Kernel !! Notes !! Availability !! Bounty !! Video Walkthrough !! Compatibility | ||
<!-- ========== 2004 ========== --> | <!-- ========== 2004 ========== --> | ||
Revision as of 19:00, 13 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).
Known XSS Build List
- Built from XenonLibrary data (used with permission). Extra columns added for CNH.
| Build Date | XSS/SDK Build | Kernel | Notes | Availability | Bounty | Video Walkthrough | Compatibility |
|---|---|---|---|---|---|---|---|
| 2004 | |||||||
| January 2004 | 0180.0 | 2.0.0180.0 | Internal/External. | — | — | — | xenon-a (Power Mac G5) |
| January 2004 | 0189.0 | 2.0.0189.0 | Internal/External. Update to SDK tools. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| January 2004 | 0193.0 | 2.0.0193.0 | Internal/External. Fixed fan issue. LINKER_STACKSIZE to 1MB. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0194.0 | 2.0.0194.0 | Internal/External. Updated fan driver. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0195.0 | 2.0.0195.0 | Internal/External. 480p support added. Launcher localization. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0196.0 | 2.0.0196.0 | Internal/External. Warm boot GPU hang note; launcher bitmap change. Bug fixes. | — | — | — | — |
| February 2004 | 0197.0 | 2.0.0197.0 | Internal/External. New compiler toolset. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0198.0 | 2.0.0198.0 | Internal. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0199.0 | 2.0.0199.0 | Internal. Final A5 milestone (initial partner release) merged to main. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0201.0 | 2.0.0201.0 | Internal/External. New compiler toolset. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| 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) |
| February 2004 | 0203.0 | 2.0.0203.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0205.0 | 2.0.0205.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0208.0 | 2.0.0208.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| February 2004 | 0211.0 | 2.0.0211.0 | Internal/External. Artifacting while launcher runs. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0311.0 | 2.0.0311.0 | Internal/External. New compiler toolset. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0313.0 | 2.0.0313.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0314.0 | 2.0.0314.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0316.0 | 2.0.0316.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0327.0 | 2.0.0327.0 | Internal/External. Localization fixes. Minimal 720p. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0329.0 | 2.0.0329.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0330.0 | 2.0.0330.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0338.0 | 2.0.0338.0 | Internal/External. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0401.0 | 2.0.0401.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| March 2004 | 0402.0 | 2.0.0402.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| April 2004 | 0419.0 | 2.0.0419.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| April 2004 | 0420.0 | 2.0.0420.0 | Internal/External. XUI interpolation improvements. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| April 2004 | 0422.0 | 2.0.0422.0 | Internal/External. New compiler toolset. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| April 2004 | 0424.0 | 2.0.0424.0 | Internal/External. XUI improvements; DrawPrimitiveUP for Shrek. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| May 2004 | 0431.0 | 2.0.0431.0 | Internal/External. Compiler based on VC++ 2005 “Whidbey”; conformance & FP model. Bug fixes. | — | — | — | SDK QFE |
| June 2004 | 0530.0 | 2.0.0530.0 | Internal/External. Main branch external release. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| June 2004 | 0530.1 | 2.0.0530.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| June 2004 | 0612.0 | 2.0.0612.0 | Internal/External. Bug fixes. | — | — | — | — |
| 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) |
| June 2004 | 0620.0 | 2.0.0620.0 | Internal/External. Bug fixes. | — | — | — | — |
| June 2004 | 0622.0 | 2.0.0622.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| June 2004 | 0625.0 | 2.0.0625.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| June 2004 | 0634.0 | 2.0.0634.0 | Internal/External. Main branch external release. Bug fixes. | — | — | — | — |
| July 2004 | 0708.0 | 2.0.0708.0 | Internal/External. Bug fixes. | — | — | — | — |
| July 2004 | 0711.0 | 2.0.0711.0 | Internal/External. Bug fixes. | — | — | — | — |
| July 2004 | 0713.0 | 2.0.0713.0 | Internal/External. Bug fixes. | — | — | — | — |
| July 2004 | 0714.0 | 2.0.0714.0 | Internal/External. Bug fixes. | — | — | — | — |
| July 2004 | 0715.0 | 2.0.0715.0 | Internal/External. Bug fixes. | — | — | — | — |
| June 2004 | 0716.0 | 2.0.0716.0 | Internal/External. Bug fixes. | — | — | — | — |
| August 2004 | 0731.0 | 2.0.0731.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| August 2004 | 0810.0 | 2.0.0814.0 | Internal/External. Bug fixes. | — | — | — | — |
| September 2004 | 0919.0 | 2.0.0919.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| September 2004 | 0920.0 | 2.0.0920.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| October 2004 | 0930.0 | 2.0.0930.0 | Internal/External. Major FriendsUI checkpoint. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| October 2004 | 1012.0 | 2.0.1012.0 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| October 2004 | 1013.0 | 2.0.1013.0 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| October 2004 | 1015.0 | 2.0.1015.0 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| October 2004 | 1016.0 | 2.0.1016.0 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| October 2004 | 1017.0 | 2.0.1017.0 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| November 2004 | 1029.0 | 2.0.1029.0 | Internal/External. Bug fixes. | — | — | — | xenon-a (Power Mac G5) |
| November 2004 | 1084.0 | 2.0.1084.0 | Internal/External. | — | — | — | xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9) |
| November 2004 | 1108.0 | 2.0.1108.0 | Internal/External. | — | — | — | SDK QFE |
| November 2004 | 1109.0 | 2.0.1109.0 | Internal/External. | — | — | — | SDK QFE |
| November 2004 | 1111.0 | 2.0.1111.0 | Internal/External. | — | — | — | SDK QFE |
| November 2004 | 1112.0 | 2.0.1112.0 | Internal/External. | — | — | — | SDK QFE |
| November 2004 | 1113.0 | 2.0.1113.0 | Internal/External. | — | — | — | SDK QFE |
| December 2004 | 1141.0 | 2.0.1141.0 | Internal/External. | — | — | — | xenon-a (Power Mac G5) |
| December 2004 | 1203.0 | 2.0.1203.0 | Internal/External. | — | — | — | xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9) |
| December 2004 | 1208.0 | 2.0.1208.0 | Internal/External. | — | — | — | xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9) |
| 2005 | |||||||
| January 2005 | 1232.0 | 2.0.1232.0 | Internal/External. Used for EV2 bringup. | — | — | — | xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9) |
| January 2005 | 1233.0 | 2.0.1233.0 | Internal/External. Used for EV2 bringup. | — | — | — | xenon-a (Power Mac G5) / xenon-sd (Shiva/DD.9) |
| 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) |
| January 2005 | 1242.1 | 2.0.1242.1 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| February 2005 | 1315.0 | 2.0.1315.0 | Internal/External. Bug fixes. | — | — | — | xenon-a / xenon-sd / xenon-r1 (WN1) |
| February 2005 | 1329.0 | 2.0.1329.0 | Internal/External. Bug fixes. | — | — | — | xenon-a / xenon-sd / xenon-r1 (WN1) |
| 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) |
| March 2005 | 1418.0 | 2.0.1418.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1419.0 | 2.0.1419.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1423.0 | 2.0.1423.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1427.0 | 2.0.1427.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1428.0 | 2.0.1428.0 | Live BVTs: Rich Presence & Session tests; HUD flicker fix. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1502.0 | 2.0.1502.0 | 15xx branch; pushed changes as 1428 (same day). | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1429.0 | 2.0.1429.0 | XSession API fixes. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1430.0 | 2.0.1430.0 | Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1504.0 | 2.0.1504.0 | Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1433.0 | 2.0.1433.0 | Bug fixes. | — | — | — | xenon-r1 (WN1) |
| 2005 | |||||||
| January 2005 | 1232.0 | 2.0.1232.0 | Internal/External. Used for EV2 bringup. | — | — | — | xenon-a (Power Mac G5); xenon-sd (Shiva/DD.9) |
| January 2005 | 1233.0 | 2.0.1233.0 | Internal/External. Used for EV2 bringup. | — | — | — | xenon-a (Power Mac G5); xenon-sd (Shiva/DD.9) |
| 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) |
| January 2005 | 1242.1 | 2.0.1242.1 | Internal/External. Bug fixes. | — | — | — | SDK QFE |
| February 2005 | 1315.0 | 2.0.1315.0 | Internal/External. Bug fixes. | — | — | — | xenon-a; xenon-sd; xenon-r1 (WN1) |
| February 2005 | 1329.0 | 2.0.1329.0 | Internal/External. Bug fixes. | — | — | — | xenon-a; xenon-sd; xenon-r1 (WN1) |
| 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) |
| March 2005 | 1418.0 | 2.0.1418.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1419.0 | 2.0.1419.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1423.0 | 2.0.1423.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1427.0 | 2.0.1427.0 | Internal/External. Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1428.0 | 2.0.1428.0 | Live BVTs (Rich Presence, Session); HUD flicker fix; bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1502.0 | 2.0.1502.0 | 15xx branch; pushed as 1428 same day. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1429.0 | 2.0.1429.0 | XSession API fixes; bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1430.0 | 2.0.1430.0 | Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1504.0 | 2.0.1504.0 | Bug fixes. | — | — | — | xenon-r1 (WN1) |
| March 2005 | 1433.0 | 2.0.1433.0 | Bug fixes. | — | — | — | xenon-r1 (WN1) |
| 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) |
| March 2005 | 1508.0 | 2.0.1508.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| April 2005 | 1510.0 | 2.0.1510.0 | Internal/External. | — | — | — | xenon-a; xenon-sd; xenon-r1 (WN1) |
| April 2005 | 1515.0 | 2.0.1515.0 | Internal/External. | — | — | — | xenon-a; xenon-sd; xenon-r1 (WN1) |
| April 2005 | 1522.0 | 2.0.1522.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| April 2005 | 1529.0 | 2.0.1529.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| April 2005 | 1538.0 | 2.0.1538.0 | Main branch external release. | — | — | — | xenon-a; xenon-sd; xenon-r1 (WN1) |
| April 2005 | 1610.0 | 2.0.1610.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| May 2005 | 1615.0 | 2.0.1615.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| May 2005 | 1616.4 | 2.0.1616.4 | Planned manufacturing factory kernel for WN1 (EV3/EV4, typically Xenon FAB G). | — | — | — | xenon-r1 (WN1) |
| June 2005 | 1746.1 | 2.0.1746.1 | Main branch external release; many SDK/PIX fixes; early Live camera kits. | — | — | — | xenon-r1 (WN1) |
| July 2005 | 1810.5 | 2.0.1810.5 | Manufacturing factory kernel for EV5/DV samples. | — | — | — | xenon-r1 (WN1) |
| July 2005 | 1814.0 | 2.0.1814.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| July 2005 | 1831.0 | 2.0.1831.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| July 2005 | 1834.0 | 2.0.1834.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| July 2005 | 1836.0 | 2.0.1836.0 | Internal/External. | — | — | — | xenon-r1 (WN1) |
| August 2005 | 1838.0 | 2.0.1838.0 | August preview; major kernel for beta hardware. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1838.1 | 2.0.1838.1 | Memory page size default 64KB; marketplace updates; side tools; avatars. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1839.2 | 2.0.1839.2 | Manufacturing factory kernel for DVT and final Xenon dev hw. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1846.0 | 2.0.1846.0 | Internal/External. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1849.0 | 2.0.1849.0 | Internal/External. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1852.0 | 2.0.1852.0 | Internal/External. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1853.0 | 2.0.1853.0 | Internal/External. | — | — | — | xenon-r1 (WN1); xenon-r2 (WN2) |
| August 2005 | 1856.0 | 2.0.1856.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1859.0 | 2.0.1853.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1861.0 | 2.0.1861.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1863.0 | 2.0.1863.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1864.0 | 2.0.1864.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1865.0 | 2.0.1865.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1868.0 | 2.0.1868.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1869.0 | 2.0.1869.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1870.0 | 2.0.1870.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1870.2 | 2.0.1870.2 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1871.0 | 2.0.1871.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1872.0 | 2.0.1872.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| 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) |
| August 2005 | 1875.0 | 2.0.1875.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| August 2005 | 1880.0 | 2.0.1880.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 1888.0 | 2.0.1888.0 | Main branch base kernel. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.1 | 2.0.1888.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.2 | 2.0.1888.0 | Fix shader issues present in 2099.1. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.3 | 2.0.1888.0 | Fixes GPU hang; accurate DVD emulation; SDK fixes. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.4 | 2.0.1888.0 | Stability fixes; symbols updated; title libs unchanged vs 2099.3. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.6 | 2.0.1888.0 | Fixes triangle clipper GPU hang; tool fixes. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.7 | 2.0.1888.0 | Updates emulator firmware to 6D; multiple tool fixes. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2099.9 | 2.0.1888.0 | Adds heap runtime checks; several tool fixes. | — | — | — | xenon-r2 (WN2) |
| September 2005 | 2112.0 | 2.0.2112.0 | Internal/External/TakeHome. | — | — | — | xenon-r2 (WN2) |
| October 2005 | 1893.0 | 2.0.1893.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| October 2005 | 1895.0 | 2.0.1895.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| October 2005 | 2099.11 | 2.0.1888.0 | QFE: fix hang on IXMediaXmvPlayer::Release. | — | — | — | xenon-r2 (WN2) |
| October 2005 | 2135.2 | 2.0.1888.0 / 2.0.2135.0 | Main branch external release. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 1898.0 | 2.0.1898.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2237.0 | 2.0.2237.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2240.0 | 2.0.2240.0 | Like 2241 but minus one bugfix; spindle limited to 8x for testing. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2241.0 | 2.0.1888.0 / 2.0.2241.0 | Internal/External/TakeHome. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2242.0 | 2.0.2242.0 | For testing spindle speed 8x limit. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2243.0 | 2.0.2243.0 | Validate 2241→2241+ updates work. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2417.0 | 2.0.1888.0 / 2.0.2241.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| 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) |
| November 2005 | 2502.0 | 2.0.2502.0 | Internal/External. | — | — | — | xenon-r2 (WN2); zephyr-r1 (WN2) with Zephyr SMC |
| November 2005 | 2510.0 | 2.0.2510.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| November 2005 | 2511.0 | 2.0.2510.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| December 2005 | 1900.0 | 2.0.1900.0 | 19xx SB bootloader for IFX memory. | — | — | — | xenon-r2 (WN2) |
| December 2005 | 1901.0 | 2.0.1901.0 | 19xx SB bootloader for IFX memory. | — | — | — | xenon-r2 (WN2) |
| December 2005 | 1902.0 | 2.0.1902.0 | 19xx SB bootloader for IFX memory. | — | — | — | xenon-r2 (WN2) |
| December 2005 | 2255.0 | 2.0.2255.0 | Internal/External. | — | — | — | xenon-r2 (WN2) |
| December 2005 | 2527.0 | 2.0.1888.0 / 2.0.2527.0 | Internal/External. | — | — | — | xenon-r2 (WN2)
|