Zombies are the enemies in this game in which you must try to kill. Each wave, different types of zombies will spawn. As more waves are completed, harder and rarer zombies start to spawn. In order to kill zombies (and others), weapons must be used. Despite the title Zombie Attack, zombies are not the only enemies in the game.
Each type of zombie has a chance as spawning as an enraged zombie, which are stronger and have more health than their normal variant.