LambdaGeneration
Half-LifePortalTeam Fortress 2Source FilmmakerValveBlack MesaLambdaGenerationSven Co-opEntropy : ZeroGarry's ModCounter-Strike: Global OffensiveLeft 4 Dead
LambdaGeneration

Joined

Valve
Valve
Team Fortress 2
Team Fortress 2
LambdaGeneration
LambdaGeneration
Black Mesa
Black Mesa
Half-Life
Half-Life