Team Fortress 2
23.8 hrs last two weeks / 567.3 hrs on record
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Left 4 Dead 2
13.9 hrs last two weeks / 13.9 hrs on record
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Counter-Strike
Counter-Strike: Source
Dark Messiah Might and Magic Multi-Player
Dark Messiah Might and Magic Single Player
Day of Defeat
Deathmatch Classic
Half-Life
Half-Life 2
7.3 hrs on record
Half-Life 2: Deathmatch
Half-Life 2: Episode One
1.3 hrs on record
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
5.4 hrs on record
Half-Life Deathmatch: Source
Left 4 Dead
31.7 hrs on record
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Left 4 Dead 2 Add-on Support
Left 4 Dead 2 Authoring Tools
Left 4 Dead Authoring Tools
Portal
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Ricochet
Source SDK
