Even a perfect ISO can have problems. Here are the top fixes for the PSP version.
If you want to play the authentic Superman Returns game, here are the legitimate, stable options: Superman Returns Psp Game Iso
If you are planning to run this game via an ISO, here is what to expect regarding performance: Even a perfect ISO can have problems
Superman Returns on PSP is often cited as a "glorious failure." It is repetitive and the graphics have not aged well, but the flight mechanics are surprisingly smooth. If you enjoy late-2000s licensed games, it offers a curious slice of history. here are the legitimate