PearlJam on 22 April 2011
I don't think it would have sold better at all, maybe even worse. Part of it's strength is that it's an exclusive PS3 game, and MS consoles have plenty of shooters. This game will never be COD, a Halo or even a Gears of War. It just doesn't have that X factor that makes a game a huge seller. Graphics don't matter, Crysis has proven this.
I have also NEVER EVER heard a single Xbox fan say something along the lines of "I wish Killzone wasn't exclusive". There is just no interest.
