City Zombie intensified, so far they have wandered aimlessly through the streets and catch bystanders. Now they have a leader who organized the mob and sent to the base, where the rest of the townspeople live together. Help protect military personnel and civilians to put a reliable shield in the way of a large army of zombies. Pay attention to the sky, birds are also infected zombie virus and will attack. Constantly updated and improved defenses and weapons, replenish stocks of ammunition, and heal the wounds received in combat.