Last Line of Defense
Someone put a poison in the reserve water, now most of the people are dead. It would be nice it they just lay in their grave, but they are waking up and feeding upon the living. It is a zombie apocalypse and you don't want to end up as their food. You grab your gun and started shooting. The idea here is survival, but you don't need to search for food since this game just focus on the shooting part. You need to shoot them before they can be closer to you. Each kill would earn you money and you can use it to buy better a weapon.