According to Sucker Punch development director, Chris Zimmerman Infamous 2 can’t be devloped on the Xbopx 360. He said in a interview: “There’s just more processing power on the PS3. If you look at games like Uncharted 2 that’s a game that you actually can’t do on Xbox no matter how clever you are.”
“InFamous 2 is going to be the same way,” he told Play mag. “You’ll look at it and see that there’s no way we could have done this game on 360.”
“In technical terms the biggest thing that we’ve done is migrate a much larger part of our code to run on the SPUs,” he said.
“The PS3 has this elaborate architecture where there’s a whole bunch of different places you can have your code run and we had it all running in the slow part.”