I'm not sure about the current pre-order prices for this game, but this seemed like an excellent price.
*From amazons website
* Incredible New "Skillshot" System: Combine outrageous gunplay with Bulletstorm’s unique kick, slide and leash mechanics as you Kill with Skill. Every enemy presents a new opportunity for stylish, over-the-top and ever increasingly bloody ways to take them down
* The Circle of Awesome: Kill with skill to rack up the points. Cash in these points for upgrades. Use these upgrades to pull off even bigger and better "skillshots" and earn even more points… Bulletstorm’s upgrade system truly is a circle of awesome that rewards players who kill in the most creative ways
* Badass Weaponry: From your trusty Peace Maker Carbine to the explosive Flail Gun, Bulletstorm delivers an arsenal of the most inventive, death-dealing weapons ever seen that truly put the fun back into the First Person Shooter
* A Pulp Sci-Fi Adventure: Featuring a script by the acclaimed Marvel Comics writer Rick Remender (The Punisher), Bulletstorm takes you on a journey filled with plot twists and turns from betrayal to revenge and ultimately redemption
* A Dangerous Planet of Forgotten Paradise: Travel from scorched deserts to tropical forests and an adult playground resort on a beautifully realized paradise defiled, delivered by the power of the Unreal Engine