"This game is not intended to be offensive towards any religion in particular. Its aim is to push the gamers to reflect on how the religions and sacred representations are often instrumentally used to fuel or justify conflicts between nations and people ... If you feel that such a depiction [of Muhammad] would be offensive ... don't play the game at all."
Interestingly, Adult Swim's Bible Fight is essentially based on the same concept and has been playable since May 2, 2007. Granted, that game only picks on Judeo-Christian icons. Still, if we were a religious group expressing outrage (hint, hint), we'd at least direct our disgust at a mega-corporation (see The Church of England vs. Sony), you know, uh, to recoup some damages. Seriously, how do you expect little old Molleindustria.org to respond to the Faith Fighter backlash? Our best guess: a sequel starring new challenger Haile Selassie I.