User blog comment:Damac1214/Some Zombie Polls/@comment-1263839-20130424212251/@comment-162.40.206.215-20130425013920

Actually they never actually came out and said "It's Aliens!" As far as we know the device could be from future humans with time travel (it's feasible). They refer to the device as "alien" at one point, but their refering to it's unusual nature.

As far as the Zombies are concerned they are definitely made by the natural reaction of element 115 with dead bodies. (As stated in many radios and by Dr. Richtofen himself.) So I doubt that any lifeform, human or not created 115.

As far as the MPD it was either made to control some kind of servents, or whoever made it could have made it to control zombies. Either way it's existance is unclear.

Also by the level design and the radios indicate that there was once a breathable area in the MPD room. Thus Samantha and fluffy could have made it to the MPD through about five feet of zero G/ oxygen less environment from a recieveing room door to a tunnel. As most humans can survive up to 45 seconds in airless enviroments.

I loved both Moon and Shangri-la and their associated easter eggs. That theory seems somewhat possible, but who knows it could be aliens? Also I think the MPD is a refrence to pink floyd's dark side of the moon. which is a black prism.