Wait, "PS2 or later?" They ain't classics if they're that new, son!
Oh well, I'll humor you:
Halo: Combat Evolved (Xbox)
Legend of Zelda: The Wind Waker (Gamecube)
Star Wars: Knights of the Old Republic (Xbox/PC)
I think you meant "PS2 or earlier." If that's the case:
Tie Fighter (PC)
The Neverhood Chronicles (PC)
Paper Mario (N64)
Oh well, I'll humor you:
Halo: Combat Evolved (Xbox)
Legend of Zelda: The Wind Waker (Gamecube)
Star Wars: Knights of the Old Republic (Xbox/PC)
I think you meant "PS2 or earlier." If that's the case:
Tie Fighter (PC)
The Neverhood Chronicles (PC)
Paper Mario (N64)