Psychoz Interactive has Dead Strike (Ragdoll Zombies Bullet Time Shooter Edition) (iTunes Link) in the iTunes App Store for FREE for a limited time. This deal will end when the next update becomes available (very soon).

Fight your way through a sprawling 3D, zombie-infested city as four survivors attempt to stop an outbreak of the living dead.
The creation of an antidote depends on the group delivering a sample of the deadly virus to a hospital on the other side of the city. But as the foursome’s grim fight for survival continues, it becomes apparent that there’s more to the virus than anyone realized. As the group is systematically hunted by the ravenous living dead, they soon discover that these cannibalistic monsters aren’t as mindless as they look.

Dead Strike is the action-packed horror survival game the iPhone has been waiting for, with a powerful, twisted storyline, a brutal arsenal of weaponry, stunning graphics and more zombies than a BBQ at George Romero’s graveside.