Haze was originally announced for all three systems in 2006 but the lack of any other system being mentioned for over a year, and the fact that the TimeSplitters team has a massive PlayStation heritage, seemed to point the finger of exclusivity at Sony and PS3.
This isn't the case though. During an exclusive interview Free Radical's Dave Doak told CVG that while the game is leading on PS3 there are also Xbox 360 and PC versions coming. Doak added that the team hasn't had any major issues developing for Sony's machine either.