I’ve tried to play two 4-player PS2 games on my PS3 so far, and neither of them have worked.
First up, I tried to play my F1 game. It couldn’t recognize all four of my PS3 controllers. That was a while ago. Now I can’t even start the game anymore. So backwards compat for that game [...]
"4-Player PS2 Games a No-Go on PS3" - 15.03.07