Alien Swarm
Aquaria
Audiosurf
Batman: Arkham Asylum
Ben There, Dan That!
BioShock
Blueberry Garden
Borderlands
Braid
Cogs
Counter-Strike
Counter-Strike: Condition Zero
Counter-Strike: Condition Zero Deleted Scenes
Counter-Strike: Source
Counter-Strike: Source Beta
Crazy Machines
Crazy Machines 1.5 Inventors Training Camp
Crazy Machines 1.5 New from the Lab
Crazy Machines 2
Crazy Machines 2: Fluid Add-On
Darwinia
Day of Defeat
Day of Defeat: Source
Deathmatch Classic
DEFCON
DOOM 3
DOOM 3: Resurrection of Evil
DOOM II: Hell on Earth
Eets
Eufloria
Everyday Shooter
Fallout 3
Fallout: New Vegas
Final DOOM
Garry's Mod
Geometry Wars: Retro Evolved
Gish
Gumboy: Crazy Adventures
Gumboy Crazy Features
Half-Life
Half-Life 2
Half-Life 2: Deathmatch
Half-Life 2: Episode One
Half-Life 2: Episode Two
Half-Life 2: Lost Coast
Half-Life: Blue Shift
Half-Life: Opposing Force
Half-Life: Source
Half-Life Deathmatch: Source
Indiana Jones and the Fate of Atlantis
Indiana Jones and the Last Crusade
Just Cause
Left 4 Dead
Left 4 Dead 2
Loom
Lucidity
Lugaru HD
Machinarium
Master Levels for DOOM II
Metro 2033
Mightier
Mirror's Edge
Osmos
Penumbra: Overture
Plain Sight
Plants vs. Zombies: Game of the Year
Poker Night at the Inventory
Portal
Prey
Psychonauts
Rag Doll Kung Fu
Ricochet
Sam & Max 301: The Penal Zone
Sam & Max 302: The Tomb of Sammun-Mak
Sam & Max 303: They Stole Max's Brain!
Sam & Max 304: Beyond the Alley of the Dolls
Sam & Max 305: The City that Dares not Sleep
Spore
Spore: Creepy & Cute Parts Pack
Spore: Galactic Adventures
Super Meat Boy
Synergy
Team Fortress 2
Team Fortress 2 Beta
Team Fortress Classic
The Dig
The Maw
The Maw: Brute Force
The Maw: River Redirect
The Maw: Speeder Lane
The Secret of Monkey Island: Special Edition
The Ultimate DOOM
The Wonderful End of the World
Time Gentlemen, Please!
Unreal Gold
Unreal II: The Awakening
Unreal Tournament 3: Black Edition
Unreal Tournament 2004
Unreal Tournament: Game of the Year Edition
World of Goo