http://www.joystiq.com/2007/08/24/levine-c...a-on-pc-issues/
QUOTE
Levine responds quite clearly, "I promise you, there is no secret plan about the PS3 that we're keeping from people. There's no PS3 development going on that we're hiding. There's lots of stuff that gets into game code, plans change over time and we got an exclusive deal with Microsoft ... that's not a Rosetta Stone discovery."
But who knows?
Maybe Bioshock was something like 1 year time exclusive?