Team Fortress 2
32.7 hrs last two weeks / 306.5 hrs on record
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Advent Rising
Aquaria
2.6 hrs on record
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Bioshock
Blueberry Garden
Braid
4.1 hrs on record
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Commander Keen Complete Pack
Condition Zero
Condition Zero Deleted Scenes
Counter-Strike
Counter-Strike: Source
Dark Messiah Might and Magic Multi-Player
Dark Messiah Might and Magic Single Player
11 hrs on record
Darwinia
Dawn of War: Soulstorm
5.9 hrs on record
Day of Defeat
Day of Defeat: Source
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Deathmatch Classic
Deus Ex: Game of the Year Edition
Deus Ex: Invisible War
Doom 2
Doom 3
Doom 3: Resurrection of Evil
Dragon Age: Origins
143.5 hrs on record
Everyday Shooter
Evil Genius
F.E.A.R. 2: Project Origin
8 hrs on record
Final Doom
Half-Life
0.4 hrs on record
Half-Life 2
Half-Life 2: Deathmatch
Half-Life 2: Episode One
Half-Life 2: Episode Two
2.4 hrs on record
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Half-Life 2: Lost Coast
Half-Life: Blue Shift
Half-Life: Opposing Force
Half-Life: Source
Half-Life Deathmatch: Source
Heretic: Shadow of the Serpent Riders
Hexen
Hexen 2
Hexen: Deathkings of the Dark Citadel
Indiana Jones and the Fate of Atlantis
7.3 hrs on record
Left 4 Dead
6.1 hrs on record
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Left 4 Dead Authoring Tools
Loom
1.7 hrs on record
Master Levels of Doom II
Mirror's Edge
Monkey Island Special Edition
6.1 hrs on record
Morrowind
0.1 hrs on record
Oblivion
75.9 hrs on record
Painkiller: Gold Edition
Penumbra: Black Plague
Penumbra: Overture
0.8 hrs on record
Penumbra: Requiem
Portal
0.8 hrs on record
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Psychonauts
8.1 hrs on record
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
Return to Castle Wolfenstein
Ricochet
Sid Meier's Civilization IV
Sid Meier's Civilization IV: Beyond the Sword
Sid Meier's Civilization IV: Warlords
SiN 1
SiN 1 Multiplayer
SiN Episodes: Emergence
3.5 hrs on record
Source SDK
Spear of Destiny
Team Fortress Classic
The Dig
6.6 hrs on record
The Path
0.8 hrs on record
The Ship
1.6 hrs on record
The Ship Tutorial
Thief: Deadly Shadows
Trine
5.8 hrs on record
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Ultimate Doom
Uplink
Wolfenstein 3D
World of Goo
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