MW3 Zombies - WUNDERWAFFE IN SECRET VAULT : EASTER EGG SOLO GUIDE

MW3 Zombies - WUNDERWAFFE IN SECRET VAULT : EASTER EGG SOLO GUIDE. There is a secret vault in Shahin Manor. To open it, three bosses and a total of four transmitters must be activated in this easter egg. As a reward there is the Wunderwaffe.