Zombie World is a post-apocalyptic tower defense game in which you must defend a group of survivors from hordes of the undead. Build turrets, deploy military squads, drop mines, and call in airstrikes to prevent the zombies from exiting each area. You lose one survivor for every zombie that breaks through your defenses, and the mission will end if you lose all 20 survivors. Complete missions to earn upgrade points, which will allow you to upgrade your squads, turrets, mines, and airstrikes.