What are the good multiplayer games? Thanks.

We've already played...

Gauntlet: Dark Legacy
WWE
Timesplitters 2
Gran Turismo
Tekken
Cricket
FIFA
Worms

Any other good ideas? Just PS & PS2 replies thanks, I know GC / XBox / etc. have a lot of stuff and whatnot, but I DO NOT HAVE THEM. Okay. Go go go.