GTA: Zombies Shooter
The world have been taken over by the undead. People are dying and more zombies are walking the Earth. Fortunately, a soldier step in and try to save everyone else. The idea here is to kill the zombies. But beware, since you might hit the human tied to the post. You need to make sure that you wont hit the humans or you would be in deep trouble. The game would be harder as you make some progress, but don't be discourage as that is the essence of the game.