The wiki is how I even found out about this DLC, besides from Dead Money. But what I meant was could it have been possibly called Area 51 Pre-War, and did it just get renamed after? I know nothing anywhere says anything about there ever being any Area, but it just got me thinking about the possibility that Obsidian could have just masked it as Black Mountain. And besides, doesn't your brain get stolen? Can't the Think-Tanks just manipulate your mind to think you're in Arizona or something, while you could have been in Nevada the whole time?
Well considering that A51 is in Nevada, and http://images3.wikia.nocookie.net/__cb20110605113844/fallout/images/thumb/0/00/BigEmptyMap.png/, I really don't think that would be the case, expecially since there isn't a Big Mountain in Nevada... though considering http://en.wikipedia.org/wiki/File:Black_Mesa_near_Chilchinbito.jpg the idea might not entirely be as farfetched as we think, because it basically turned from the vast, wide, hill ridden area filled with flora, fauna, and tribals, to what looks like a crater that effectively turned it into an island. :shrug: Assiming that
is water surrounding the crater, of course.