Crowds of zombies invaded the earth through the portals. Trying to escape, you wander into an abandoned city. Defend the factory from the invasion of zombies. You need to try to destroy all the zombies in order to survive. Try to hold out as long as possible before reinforcements arrive. Weapons are scattered across the territory, collect them to increase your combat power. Be careful not to get caught, otherwise after the bite you will also turn into a monster ...