Team Fortress 2
12.3 hrs last two weeks / 402.4 hrs on record
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Assassin's Creed
16.7 hrs on record
Audiosurf
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Bioshock
Counter-Strike: Source
5.1 hrs on record
Day of Defeat: Source
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Half-Life 2
Half-Life 2: Deathmatch
0.6 hrs on record
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Half-Life: Source
Half-Life Deathmatch: Source
Killing Floor
11.2 hrs on record
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Killing Floor Mod: Defence Alliance 2
Killing Floor SDK
Left 4 Dead
27.7 hrs on record
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Left 4 Dead Authoring Tools
On the Rain-Slick Precipice of Darkness, Episode One
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Portal
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Source SDK
Unreal Tournament 3 Black
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