Team Fortress 2
27.2 hrs last two weeks / 228 hrs on record
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Audiosurf
3.4 hrs on record
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Counter-Strike
Counter-Strike: Source
Day of Defeat
Deathmatch Classic
Half-Life
Half-Life 2
13.5 hrs on record
Half-Life 2: Deathmatch
Half-Life 2: Episode One
2 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
Left 4 Dead
2.9 hrs on record
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Left 4 Dead Authoring Tools
Portal
7.1 hrs on record
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Ricochet
Source SDK
Team Fortress Classic
