Playing other systems on ps2...

[Afterlife]

Hi was wondering what systems games can be played on a ps2, so far I know NES & SNES, will, just wondering if someone could give me a complete list.

is it possible to get Gameboy games working on the ps2, or even GBA cos that would rock!!

If someone has a link, or know what can and cant be played on a ps2 plz tell me.

p.s im not expecting things like n64, GC, xbox to be playable, tho n64 would rock if they could be played on it!