I'll do it console by console then (whatever I've actually played then, of course), biatches.
NES: Super Mario Bros.
SNES: Final Fantasy VI
N64: The Legend Of Zelda: Ocarina Of Time
GC: The Legend Of Zelda: The Wind Waker
GB(C): Pok�mon Gold/Silver
GBA: ... can I say The Legend Of Zelda: A Link To The Past?
Genesis/Mega Drive: Sonic The Hedgehog
PSX: Final Fantasy VII
PS2: Metal Gear Solid 2 or 3... can't decide.
PC: Half-Life 2
Meh.