Survive on a small abandoned moon research base named Exomalum. In 1976 , the lunar missions were cancelled, all astronauts and people on the moon came back to earth. Now, after the apocalypse began, they decided to transfer citizens to the moon and let the government fix the apocalypse on the earth. All citizens turned into zombies. The 4 survivors found a forgotten base when they were walking to a new evacuation base further on the moon surface. They find a small console panel that works inside the base, and decided to see if anyone can answer it. Then the survival starts, and zombies start flooding in.