Left 4 Dead 2
10.3 hrs last two weeks / 31.3 hrs on record
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Team Fortress 2
2.6 hrs last two weeks / 32.5 hrs on record
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Counter-Strike: Source
Darkest Hour
Empire: Total War
87.5 hrs on record
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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
Left 4 Dead
22 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
Mare Nostrum
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Mare Nostrum Dedicated Server
Portal
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Red Orchestra
3.9 hrs on record
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Source SDK
