I've included only the games I've played (whether I beat the game or not), and only the console of which I've played a game on. Also the list does not contain my favorite XBL arcade download games.

Xbox 360:

- Halo3

- Elderscrolls IV: Oblivion

- Rainbow Six Vegas 2

- Guitar Hero 3

- Fable 2

- Rockband 2

- Bioshock

- Mass Effect

- Fallout 3

- Grand Theft Auto IV

Xbox:

- Halo

- Halo 2

- Elderscrolls III: Morrowind

- Fable

- Tony Hawk Pro Skater 2x

- Sega GT 2002

- Beyond Good and Evil

- Grand Theft Auto: San Andreas

- Grand Theft Auto: Vice City

- Grand Theft Auto 3

Playstation:

- Final Fantasy Tactics

- Final Fantasy VII

- Final Fantasy IX

- Grind Session

- Tony Hawk Proskater 2

- Legend of Legaia

- Suikoden

- Jade Cocoon

- Metal Gear Solid

- Crash Bandicoot

Playstation 2:

- Tony Hawk Underground

- Tony Hawk Underground 2

- Final Fantasy X

- ATV Quad Power Racing 2

- Suikoden III

- God of War 2

- Guitar Hero 2

- Metal Gear Solid 2

- Devil May Cry 2

- Onimusha Warlords

Wii:

- Legend of Zelda: Twilight Princess

- Super Mario Galaxy

- Super Smash Bros: Brawl

- Mario Strikers: Charged

- Wii Play

- Wii Sports

- Dragon Ball Z: Budokai Tenkaichi 3

- Mario Kart Wii

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Gamecube:

- Super Smash Bros: Melee

- Mario Kart: Double Dash

- Ikaruga

- ATV Quad Power Racing 2

- Super Mario Strikers

- Baten Kaitos

- Super Paper Mario: The Thousand Year Door

- Animal Crossing

- Skies of Arcadia Legends

- Soul Calibur II

Nintendo 64:

- Super Mario 64

- Super Smash Bros

- Ogre Battle 64

- Paper Mario

- Pokemon Stadium

- Mario Tennis

- Mario Party 3

- Worms: Armageddon

- Duke Nukem

- Mario Kart 64

Super Nintendo:

- Super Mario All-Stars

- Super Mario RPG

- Final Fantasy II

- Chrono Trigger

- Legend of Zelda: A Link to the Past

- The Twisted Tales of Spike Mcfang

- Legend of the Mystical Ninja

- Secret of Mana

- Final Fantasy: Mystic Quest

- Kirby's Dreamland 3

Nintendo:

- Blades of Steel

- Dig Dug 2

- Monster in my Pocket

- Super Mario Bros. 3

- Snake Rattle'n'Roll

- Tetris Attack

- Super Mario Bros.

- Duck Hunt

- Final Fantasy

- Bucky'O Hare

Dreamcast:

- Unreal Tournament

- Sonic Adventures

- Toy Commander

- Powerstone

- Record of Lodoss War

- Crazy Taxi

- Sega Smashpack Vol. 1

- Grandia II

- Skies of Arcadia

- Soul Calibur

Sega Genesis:

- Sonic 2

- Sonic and Knuckles

- Shining Force

- Shining Force II

- Warsong

- Vectorman

- Landstalker

- Wonder Boy in Monster World

- Phantasy Star IV

- Rock 'n Roll Racing

Gameboy/Gameboy Color:

- Pokemon Blue/Red

- Pokemon Yellow

- Legend of Zelda: Links Awakening

- Tetris

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Gameboy Advance:

- Golden Sun

- Golden Sun: Lost Age

- Lunar Legend

- Advanced Wars

- The Lost Vikings

- Bomberman Max 2

- Phantasy Star Collection

- Fire Emblem

- Final Fantasy Tactics Advance

- Boktai: The Sun is in your Hand

Nintendo DS:

- Locks Quest

- Kirby Super Star Ultra

- Mario Kart DS