Amazon is having another one of its pre-order promotions offering store credit towards another videogame purchase on their site. This time you can snag either the Xbox 360 or PlayStation 3 version of Bulletstorm for it's normal price and get $20 towards anything else after the game ships.
Bulletstorm is out next week on February 22nd, so if you haven't pre-ordered yet, now sounds like a good time. The game will ship with a four player online co-op survival mode. It'll also ship with lots of swearing.