GTA: Zombie Land
Out of nowhere, the zombies attacked and killed most of the people you know. Now, you are left alone, but you know that you need to keep on living as life doesn't stop there. You know that there are other people in other places. You need to get there and join their forces. The idea here is to keep killing some zombies. You start off with a hand gun, but don't worry as there would be powerful guns that you can use on the game. Just grab it as you move along to be able to use it.