GTA: Zombie Defense 2
No one was expecting a zombie outbreak, so it was a surprise for many, but lucky are those, who live in a protected area as their place is protected right from the start. Soon, military move in and took over the place. The residents were happy since they know that they are protected. However, the place is not protected from an all out attack as the front gate is not really close to outsider and this is where the military comes in. The idea here is not to let a single zombie pass the defense line. Take note that you are not the only one, who would defend the place, but a single zombie would become the death of all people living in an area. You should not let a single zombie pass you.