Alien Swarm: Swarm (Forked from L4D)
Counter-Strike Global Offensive: CSGO (Forked from L4D)
Counter-Strike Source: TF (Team Fortress 2)
Day of Defeat Source: TF (Team Fortress 2)
Portal: Source Engine 2013
Portal 2: Portal 2 (Forked from L4D)
Garry's Mod: GMod
Half-Life 2: 20th Anniversary (Updated Source Engine 2013)
Half-Life 2 Deathmatch: TF (Team Fortress 2)
Half-Life Deathmatch Source: TF (Team Fortress 2)
Half-Life Source: 20th Anniversary (Updated Source Engine 2013)
Left 4 Dead: L4D
Left 4 Dead 2: L4D2 (Forked from L4D)
Source Filmmaker: Swarm (Forked from L4D)
Team Fortress 2: TF (Team Fortress 2)
Black Mesa: Xengine
JBMod: Source Engine 2013
Synergy: Source Engine 2013