Killing Floor
9.8 hrs last two weeks / 125.9 hrs on record
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S.T.A.L.K.E.R.: Clear Sky
1.5 hrs last two weeks / 1.5 hrs on record
Return to Castle Wolfenstein
0.7 hrs last two weeks / 0.7 hrs on record
Killing Floor Mod: Defence Alliance 2
0.5 hrs last two weeks / 0.5 hrs on record
Serious Sam HD: The First Encounter
0.2 hrs last two weeks / 0.2 hrs on record
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Chronicles of Riddick: Assault on Dark Athena
Commander Keen Complete Pack
Counter-Strike
Counter-Strike: Source
6.3 hrs on record
Day of Defeat
Deathmatch Classic
Doom 2
Doom 3
Doom 3: Resurrection of Evil
Fallout 3
0.5 hrs on record
Final Doom
Half-Life
Half-Life 2
2 hrs on record
Half-Life 2: Deathmatch
Half-Life 2: Episode One
Half-Life 2: Episode Two
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Half-Life 2: Lost Coast
Half-Life: Blue Shift
Half-Life: Opposing Force
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Killing Floor SDK
9.7 hrs on record
Left 4 Dead
34 hrs on record
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Left 4 Dead Authoring Tools
Master Levels of Doom II
Portal
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Quake
Quake 3 Arena
Quake 3 Team Arena
Quake II
Quake II: Ground Zero
Quake II: The Reckoning
Quake Mission Pack 1: Scourge of Armagon
Quake Mission Pack 2: Dissolution of Eternity
Ricochet
Source SDK
2 hrs on record
Spear of Destiny
Team Fortress 2
2.5 hrs on record
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Team Fortress Classic
Ultimate Doom
