Left 4 Dead 2
19.5 hrs last two weeks / 47.3 hrs on record
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Team Fortress 2
11.7 hrs last two weeks / 105.8 hrs on record
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DiRT 2
1 hrs last two weeks / 3.5 hrs on record
GRID
0.6 hrs last two weeks / 3 hrs on record
Half-Life 2
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Left 4 Dead
89.1 hrs on record
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Left 4 Dead 2 Add-on Support
Left 4 Dead 2 Authoring Tools
Left 4 Dead 2 Demo
9.2 hrs on record
Left 4 Dead Authoring Tools
Portal
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