The fan favorite 4-player co-op Nazi Zombies Bonus Mode returns with "Verrückt", a terrifying Zombie asylum located in the outskirts of Berlin. The map splits the four players into pairs, challenging the two teams to find each other for survival. Featuring more weapons, perks via the addition of Perks-a-Cola machines, electroshock defenses and the endless Nazi Zombie horde, "Verrückt" will push you to the edge of your sanity.