Team Fortress 2
18.3 hrs last two weeks / 229.6 hrs on record
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Left 4 Dead 2
4.7 hrs last two weeks / 10.9 hrs on record
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Plants vs. Zombies
0.3 hrs last two weeks / 49 hrs on record
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Borderlands
140 hrs on record
Counter-Strike: Source
60.5 hrs on record
Day of Defeat: Source
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Defense Grid: The Awakening
44.1 hrs on record
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Half-Life 2
Half-Life 2: Deathmatch
4.9 hrs on record
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Left 4 Dead
100.4 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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Prince of Persia: Sands of Time
Source SDK
World of Goo
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