Warhammer® 40,000™: Dawn of War® II
5 hrs last two weeks / 390.4 hrs on record
Left 4 Dead
0.5 hrs last two weeks / 8.5 hrs on record
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Counter-Strike: Source
Dawn of War: Soulstorm
0.8 hrs on record
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 Authoring Tools
Portal
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Source SDK
Team Fortress 2
70.7 hrs on record
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