Game is fun plenty of zombies and tons of guns and choices great graphics smooth gameplay there's only one downside the maps are tiny so on some stages when killing massive Z you don't have much room to avoid the incoming damage and it comes in many different types missiles acid bombs exploding Z etc you do have to keep an eye out for ammo as you end up needing about 5 different types and med kits but it is free to play with zero ads well it was when I completed it don't know about now but hey enjoy yourself and its definitely worth playing