Zombie Apocalypse - a Free zombie games

Zombie Apocalypse - a Free zombie games - arcade action shooter and the events that develop around the scientific base which is attacked by a Horde of zombies, and scientists inside developing a vaccine from the deadly virus. Your task is gathering a squad of defense to try to keep the lab until scientists can make a cure. In addition to hurricane shooting you still have to develop defense tactics, because zombies are attacking from all sides.