Left 4 Dead
1 hrs last two weeks / 115.7 hrs on record
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Audiosurf
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Garry's Mod
33.1 hrs on record
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Geometry Wars
Half-Life 2
Half-Life 2: Deathmatch
Half-Life 2: Episode One
Half-Life 2: Episode Two
2.4 hrs on record
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Half-Life 2: Lost Coast
Half-Life Deathmatch: Source
Left 4 Dead Authoring Tools
0.7 hrs on record
Portal
0.2 hrs on record
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Source SDK
0.2 hrs on record
Team Fortress 2
10.9 hrs on record
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Unreal Tournament 3 Black
120.8 hrs on record
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