Zero city: Zombie shelter survival

The zombie shelter survival is to build a safe shelter for the survivors of zombie apocalypse. You need to defend your base from different enemies. The civilization can be recovered in the post apocalypse world of the game. People are turned into zombies by a deadly virus. There is a squad of heroes with different skills. Looking for useful resources and supplies is what you should do. There are many game features, such as: big base, interesting heroes, and fight against other players.