Team Fortress 2
2.7 hrs last two weeks / 14.3 hrs on record
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Audiosurf
1.4 hrs last two weeks / 3.6 hrs on record
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World of Goo
0.6 hrs last two weeks / 0.7 hrs on record
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Bioshock
Commander Keen Complete Pack
Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
Counter-Strike: Source
Crysis
Crysis Warhead
Crysis Wars
Darwinia
Day of Defeat
Day of Defeat: Source
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Deathmatch Classic
Doom 2
Doom 3
Doom 3: Resurrection of Evil
FarCry
0.2 hrs on record
Far Cry 2
Far Cry 2: Fortunes Pack
Final Doom
FlatOut
FlatOut2
Garry's Mod
1 hrs on record
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Geometry Wars
Grand Theft Auto
Grand Theft Auto 2
Grand Theft Auto 3
Grand Theft Auto: San Andreas
Grand Theft Auto: Vice City
Half-Life
Half-Life 2
Half-Life 2: Deathmatch
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Half-Life: Blue Shift
Half-Life: Opposing Force
Half-Life: Source
Half-Life Deathmatch: Source
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Killing Floor
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Killing Floor Mod: Defence Alliance 2
Killing Floor SDK
Left 4 Dead
11.9 hrs on record
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Left 4 Dead 2
10.2 hrs on record
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Left 4 Dead 2 Add-on Support
Left 4 Dead 2 Authoring Tools
Left 4 Dead 2 Demo
1 hrs on record
Left 4 Dead Authoring Tools
Master Levels of Doom II
Multiwinia
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Osmos
20.9 hrs on record
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Portal
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Prey
Quake
Quake 3 Arena
Quake 3 Team Arena
Quake II
Quake II: Ground Zero
Quake II: The Reckoning
Quake Mission Pack 1: Scourge of Armagon
Quake Mission Pack 2: Dissolution of Eternity
Return to Castle Wolfenstein
Ricochet
RoboBlitz
Source SDK
Spear of Destiny
Spore
Spore: Creepy and Cute Parts Pack
Team Fortress Classic
Ultimate Doom
Unreal Gold
Unreal II: The Awakening
Unreal Tournament
Unreal Tournament 3 Black
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Unreal Tournament 2004
0.5 hrs on record
