Sean Cooper Games and MEDL Mobile have created a highly addicting gem of a game, Boxhead: The Zombie Wars. [$.99 for the next two days - iTunes Link] Playing this game makes me feel like I've died and gone to zombie heaven.
Boxhead: The Zombie Wars is a extremely fast paced action-shooter where you get to play as Jon Bambo, a mercenary with a kick butt arsenal of weaponry which includes - pistol, shotgun, C4 explosives, minigun, turret machine guns, etc...
The premise is simple, kill as many zombies as you possibly can without dying. The more zombies you kill in a row, the higher your points multiplier will go. The higher you get your multiplier, bigger and more destructive your weapons will be at your disposal. Zombie destruction on your iPhone has never been so enjoyable.