I heard one about all the zombie maps in CoD B.O. On every map there is a hidden switch/node that tells you a snippet of the story (of the modes universe). Ending with moon map at which point you launch a nuke into earth and then go down. Supposedly this the story for the new zombie mode in B.O. 2. I tried finding shit in the first two maps but was not successful enough. Not paying to try the rest.