BlkPaladin on 09 December 2012
Quite a lot:
Atari 2600
NES - Gameboy
SNES - Genesis (+CD) - Gameboy Color
N64 - Saturn - PSX
Gamecube - Dreamcast - PS2 - Xbox - GBA
Wii - PS3 - 360 - DS(Phat and Lite) - PSP2000
WiiU - 3DS
I also have a PC, Phone, and iPod Touch all with little games on them.