Computer:

Age of Chivalry (HL2 Mod)
Alien Breed 2: Assault
Alien Swarm
Alpha Protocol
America's Army 3
Amnesia: The Dark Descent
And Yet It Moves
APB Reloaded
Aquaria
Assassin's Creed
Assassin's Creed 2
Assassin's Creed Revelations
Audiosurf
Battlefield 2
Battlefield 3
BioShock 2
BIT.TRIP RUNNER
Braid
Burnout Paradise
Call of Duty: Black Ops - Singleplayer
Call of Juarez: Bound in Blood
Call of Juarez: The Cartel
Champions Online: Free For All
Codename Gordon
Cogs
Counter-Strike: Source
Counter-Strike: Source Beta
Crayon Physics Deluxe
Crysis 2
Day of Defeat: Source
Dead Island
Deus Ex: Human Revolution
Dino D-Day
Driver: San Francisco
The Elder Scrolls V: Skyrim
Duke Nukem 3D
Dystopia (HL2 Mod)
Empires (HL2 Mod)
Fallout: New Vegas
FlatOut: Ultimate Carnage
From Dust
Garry's Mod
Gish
Grand Theft Auto
Grand Theft Auto 2
Grand Theft Auto III
Grand Theft Auto IV
Grand Theft Auto: Episodes from Liberty City
Grand Theft Auto: San Andreas
Grand Theft Auto: Vice City
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
Hammerfight
Insurgency (HL2 Mod)
I Wanna Be The Boshy
Jamestown
Just Cause
Just Cause 2
Killing Floor
Killing Floor Mod: Defence Alliance 2
Left 4 Dead
Left 4 Dead 2
LIMBO
Lugaru HD
Machinarium
Mega Game
Mega Game 2
Magicka
Metro 2033
Mightier
Minecraft
Moonbase Alpha
Mount & Blade: With Fire & Sword
Nerf Arena Blast
Nightmare House 2 (HL2 Mod)
No More Room In Hell (HL2 Mod)
NightSky
Osmos
Overgrowth
Peggle Extreme
Penumbra: Overture
Portal
Portal 2
Portal: Prelude (Portal Mod)
Postal 2
Postal 3
Puzzle Pirates
Rakenna autoja Masa Mainion kanssa (Build cars with Masa Mainio) <--- Lolwut [link]
Red Faction: Armageddon
Resident Evil 4
Revenge of the Titans
Resistance And Liberation (HL2 Mod)
Runaway: The Dream of the Turtle
Rusty Hearts
S.T.A.L.K.E.R.: Call of Pripyat
S.T.A.L.K.E.R.: Shadow of Chernobyl
Saints Row 2
Samorost 2
Serious Sam Double D
Shadowgrounds
Shadowgrounds: Survivor
Shank
The Sims Deluxe Edition
The Sims Hot Date (Expansion Pack)
The Sims 2 Double Deluxe
The Sims 3
The Sims 3 Late Night (Expansion Pack)
The Sims 3 Pets (Expansion Pack)
The Sims 3 Town Life Stuff (Expansion Pack)
SMOD Redux Version 8 (HL2 Mod)
Smashball (HL2 Mod)
Spiral Knights
Super Meat Boy
Sven Co-op (HL Mod)
Synergy (HL2 Mod)
Team Fortress 2
Team Fortress 2 Beta
Team Fortress Classic
Terraria
Tom Clancy's Splinter Cell: Conviction
TrackMania Nations Forever
Trine
Voxatron
War Inc. Battlezone
World Basketball Manager 2010
World of Goo
Zombie Panic! Source (HL2 Mod)

(Btw half of these games are uninstalled)

Xbox 360:

Assassin's Creed Brotherhood
Battlefield: Bad Company
Call of Duty Black Ops
DJ Hero
DJ Hero 2
Grand Theft Auto IV
Halo 3
Hexic HD
Left 4 Dead
LEGO Batman
Mirror's Edge
Pure
Red Faction: Guerrilla
The Orange Box