The ε is mistakenly placed on the control panel for Omicron, and the O is misplaced on Epsilon's control panel.
Big Bang Theory - (100 ) - In Moon, gain sweet, sweet, revenge.Cryogenic Slumber Party(75 / Silver Trophy ) - In Moon, complete Richtofen's Grand Scheme.Ground Control (10 / Bronze Trophy ) - In Moon, prevent each excavator from breaching the base in one game.
(Requires Excavators Pi and Omicron to be blocking off the Receiving/Starting Area from the rest of the map and activates the Easter Egg song Nightmare.)
#Black ops 1 moon free
Periodically after turning the power on, a warning will play out in the beginning of a round telling that an excavator is about to breach an area of the station. Three excavators appear in Moon: Pi, Epsilon and Omicron, each with their own control panel in the starting room.