Black Mesa
Counter-Strike (1.6)
Counter Strike Source
Day of Defeat
Deathmatch Classic
Half-Life
Half-Life 2
HL2: Deathmatch
HL2: Lost Coast
HL: Blue Shift
HL: Opposing Force
Portal
Ricochet (Half-Life classic mod)
Team Fortress 2
Team Fortress Classic
Tribes: Ascend

"Ah good. Now I'm on the internet clearly saying I like tranny cleavage. This shouldn't get me harassed at all."
-- Lothar of the Hill People