Source SDK Release Notes
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Note:The latest release note on Steam News page is no longer updated. Instead the release note below are copied from source-sdk-2013 GitHub Commits history. This page is currently up to date as of March 2025.
Note:If you see this page when you first open the "Source SDK" (AppID 211) launcher, please note that the standalone Source SDK tool/launcher are no longer updated, and does not support Source 2013 games. The deprecated Source SDK tools are provided to create content-based mods for Source 2009 or earlier, and to obtain source code & create mods for Source SDK Base 2006 and Source SDK Base 2007.
Note:The latest release note on Steam News page is no longer updated. Instead the release note below are copied from source-sdk-2013 GitHub Commits history. This page is currently up to date as of March 2025.Note:If you see this page when you first open the "Source SDK" (AppID 211) launcher, please note that the standalone Source SDK tool/launcher are no longer updated, and does not support Source 2013 games. The deprecated Source SDK tools are provided to create content-based mods for Source 2009 or earlier, and to obtain source code & create mods for Source SDK Base 2006 and Source SDK Base 2007.
To launch the SDK applications (Hammer, HLMV, etc...) manually on Source 2013 games, see SDK Installation - SteamPipe migration section.
Source SDK 2013 update (3/22/2025)
Multiplayer (Team Fortress 2 branch)
- Fix crash on VGUI menu bar button cursor entrance
Fix Spy bots using human voice lines in MvM
Updated source code (as of 3/22/2025)
- Source 2013 Singleplayer: Source SDK 2013 GitHub repo.
- Note:SP code remains unchanged since 2014.
- TF2 branch (newer Source 2013 MP): Source SDK 2013 GitHub repo.
Previous releases
- See the Source SDK release notes archive for information on previous releases.