ExZeus

* Fast and furious 3D shoot'em-up style, with powerful weapons.
* Up to 12 different enemies and 5 different bosses.
* Hit-bonus system and power-up scheme.
* Multi-Lock and Fire & Forget Missiles.
* Shop to upgrade your robot's features and build your strategy.
* Original soundtrack with high-energy beat keeps pace with the intensity of the action.
* 3D Sound.
* Use of the accelerometer to control your Robot, Lock and Shoot missiles at will.
* Full animated Tutorial.
* Unlimited replay value.

App Store Link

via Gamedroid - Video reviews for iPhone games - ExZeus