Category:Engine branches

Family tree of all Valve engines ( GoldSrc, Source, Source 2), including both official & third-party engine branches, aswell as games.

Various branches of the GoldSrc and Source engine by both Valve and third-party developers. A build of GoldSrc and Source is only considered a branch when it is incompatible with previous releases.

For example, Source 2013 (which includes Half-Life 2) does not have any new features that CS:GO engine branch had, and maps (aswell as VTF 7.5 textures) made for Alien Swarm (up to Counter-Strike: Global Offensive) will refuse to load in Half-Life 2, unless it is converted.

Additionally, there is also sub-branches. In Source 2009 and Source Multiplayer case, Source Multiplayer is primarily designed for multiplayer, and received more frequent updates. The same is also true for Source 2013 Singleplayer and Source 2013 Multiplayer, with the latter sub-branch first released in March 2013, before Source 2013 Singleplayer in May 2013. Source 2013 Multiplayer (and later it's successor, Team Fortress 2 branch) additionally have features exclusive to that branch, like static prop lightmaps, BSP compression, more ambient cubes per visleaf for example.

Engine branches

GoldSrc

Source

Source 2004 ▶ Source 2006 ▶ Source 2007 ▶

Source 2009 ▶ Source 2013 Singleplayer Source Multiplayer ▶ Source 2013 Multiplayer (Xengine) ▶ Team Fortress 2 branch Left 4 Dead engine branch ▶ Alien Swarm engine branch ▶ Portal 2 engine branch(Titanfall branch) ▶ CS:GO engine branch (Strata Source) ▶ Dota 2 engine branch

See Branching on Wikipedia.