Grand Zombie Swarm

Due to the depletion of the earth's resources and the destruction of the environment by humans, the virus has mutated. More and more humans are infected by this powerful virus and become zombies. As a special force soldier who is not infected by the virus, you need to defend only what remains. It's a safe city and food, and use different weapons to kill hordes of zombies. It's worth noting that this is an open world where you can kill more zombies under the precondition of ensuring your survival.