[SaW]

Quite a lot:

GTA 1 (PC)
GTA: London (PC)
GTA 2 (PC)
GTA 3 (PC and xbox)
GTA: VC (PC and xbox)
GTA: SA (PC and xbox)
GTA: LCS (PSP)
GTA: VCS (PSP)
GTA: IV (Xbox 360)
Half life 2 (Xbox 360)
Portal (Xbox 360)
HL2: Episode 1 (Xbox 360)
Need for speed underground (gamecube)
Need for speed underground 2 (PC)
Need for speed carbon (Gamecube)
Need for speed: Most Wanted (PC)
Need for Speed: Prostreet (Wii)
The legend of zelda: Ocarina of time (Gamecube)
The legend of zelda: Majoras mask (Gamecube)
The legend of zelda: Twilight princess (Wii)
Super mario galaxy (Wii) It rocks
Hitman: Silent assassin (PC)
Hitman: Blood money (Xbox)
Condemned 2: Bloodshot (Xbox 360)
Condemned: Criminal origins (Xbox 360)
Fahrenheit (Indigo Prophecy) (Xbox) - The story of this game is amazing! This really is worth buying!
Resident Evil 4 Wii edition
Red Steel (Wii) - This game sucks
Driver: Parallel Lines (Wii)

And few more :P
I've had quite a lot consoles..