Template:Source branches

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This template contains list of Source engine branches, including third-party branches (using {{{show}}} parameters set to thirdparty).

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Valve

Release date	Title	Developer	Platforms	Notes
7 Oct 2004	Source 2004	Valve Corporation	PC: Windows	First released with Counter-Strike: Source, later used by Half-Life 2, Half-Life: Source. Later received HDR update in 2005 with the release of Half-Life 2: Lost Coast.
1 Jun 2006	Source 2006	Valve Corporation	PC: Windows	Released with the release of Half-Life 2: Episode One, all previous Valve games using Source 2004 were upgraded to this branch. See Features section for the list of changes and new features.
10 Oct 2007	Source 2007	Valve Corporation	PC: Windows	Also known as "The Orange Box engine branch". Released with the release of The Orange Box (Half-Life 2: Episode Two, Team Fortress 2 and Portal). Half-Life 2 and Half-Life 2: Episode One was also ported to this engine branch exclusively on consoles (Xbox 360, PlayStation 3). See Features section for the list of changes and new features.
17 Nov 2008	Left 4 Dead engine branch	Valve Corporation	PC: Windows	Released in 2008 with the release of Left 4 Dead, and later updated for Left 4 Dead 2 in 2009. Runs on newer version of Source, which does not requires Half-Life 2 base content to run. Game files from this branch were stored into VPK files, as opposed to GCF. See Features section for the list of changes and new features.
3 Jun 2009 [confirm]	Source 2009	Valve Corporation	PC: Windows, macOS (2010), Linux (2014)	Released in 2009 with an update to Day of Defeat: Source, and later Team Fortress 2. All Source 2006 games (except Half-Life: Source and Half-Life Deathmatch: Source) were upgraded to this branch with the release of Mac update in May 26, 2010 (Half-Life 2 and it's episodes), and later on Windows in June 10, 2010, alongside Counter-Strike: Source update which features many new changes from Hidden Path Entertainment.
19 Jul 2010	Alien Swarm engine branch	Valve Corporation	PC: Windows	Released in 2010 with the release of Alien Swarm, a remake of the Unreal Tournament 2004 mod with the same name. This is the only post-Orange Box engine branch with it's source code publicly available for free.
18 Apr 2011	Portal 2 engine branch	Valve Corporation	PC: Windows, macOS, Linux (2014)	Released in 2011 with the release of Portal 2.
21 Aug 2012	CS:GO engine branch	Valve Corporation	PC: Windows, macOS, Linux (2014)	Released in 2012 with the release of Counter-Strike: Global Offensive, featuring many changes not available with previous branches. This engine branch was later made obsolete with the release of Counter-Strike 2, which is the port of CS:GO to the Source 2 engine, which also adds new gameplay features and remake several maps.
7 May 2013	Source 2013	Valve Corporation	PC: Windows	Released in 2013, during the transition to the new content distribution system called SteamPipe. All remaining Source 2006 games (Half-Life: Source and Half-Life Deathmatch: Source) and all Source 2009 (including Source Multiplayer sub-branch) were upgraded to this branch. Source SDK Launcher has been deprecated on this branch in favor of launching tools (Hammer, Model Viewer, etc.) through .bat files, located in game name\bin. Aside from that, the SteamPipe update infamously broke tons of old Source engine mods, requiring manual fix in order for it to function correctly.
9 Jul 2013	Dota 2 engine branch	Valve Corporation	PC: Windows	Released in 2013 with the release of Dota 2. This engine branch was later made obsolete with the release of Dota 2 Reborn update, completely upgraded to the new Source 2 engine.
Release date	Title	Developer	Platforms	Notes

Third-party

Todo: Coming soon. List the third-party Source engine branch here.

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