4 players,8 on Grief mode, have to survive waves of attacking zombies, getting points for killing zombies and repairing barriers. These points can be used to buy guns from the wall, onlock area's of the map, buy perks and buy guns from the mystery box and activate traps. There is no limit to the number of rounds; the game ends if all players have been Killed by Zombies, or if the player completes the easter egg on certain maps. Zombies will become stronger, faster and spawn in higher numbers every round, forcing players to make tactical decisions about point spending and exploring through the map. Sometimes zombies will drop power-ups such as Max Ammo, Nuke, or Insta-Kill if they die, making the rounds easier.
