Category:Source engine branches

All  Source engine branches (both official and third-party branches) in one image.

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

The following branches are currently still in development or being maintained (actively being updated within 3 years):

Official

•  Source 2013 Singleplayer (all games except the SDK 2013 Base SP)
•  Team Fortress 2 branch
•  Left 4 Dead engine branch
•  Portal 2 engine branch

Third-party

•  Strata Source
•  Xengine
•  Titanfall branch

The following branches has been discontinued and no longer received any updates:

•  Alien Swarm engine branch
  • Sporadically updated, last update was in 2020.
•  CS:GO engine branch
  • Replaced by Counter-Strike 2, which runs on Source 2.
•  Dota 2 engine branch
  • Switched to Source 2.
•  Source 2004
•  Source 2006
•  Source 2007
•  Source 2009
•  Source Multiplayer

Source Engine branch tree

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 also

• List of Source engine branches
• Source engine build numbers