Sry but in my opinion it's solely up to sony to keep the exclusives exclusive.
If Namco, Square or any other developer wouldn't multi-plat with their games they would just be nuts if there are no payments from eiter MS or Sony.
Let's say Namco makes 20$ with every copy sold on the 360 and they sell 1million copys. Porting shouldn't be too expensive.
So let's guess Namco makes 18$ million by releasing it on the 360.
Unless Sony pays them heavily I don't see any reason not to go multi plat.







