Call Of Duty Zombies - Project X

After a long 10 years, battling the undead, and fighting for they're lives, Richtofen and his crew, have been trapped on the Moon...but, in the darkest of hours, their return, shall spark the longest and greatest war, in the history of mankind, and the final battle, between two, intelligent and powerful scientists, will shake the world and destroy the one and only...Project X...