KAPTAINmORGANnWo4life said:
Something happens that causes one of these unstoppable, unfeeling, all-consuming alien genocide machines to line their sights upon Fallout Earth, circa 2277. Whatever it is, be it the Scenic Overlooks, the porn, the radio stations, that has caused this race of unknowable horrors to want the Vault Boy dead, the monsters are not passing the planet up due to the environment or sparse population.
But, they are playing by their own rules. The one common trait among most of these kind of villains is that they want the fauna dead, not the planet. So, while most of them are more than capable of destroying the planet, they're simply not going to do it. Could the disparate, hardened, survivalists in North America avoid the invaders until they die or leave?
And if you think these listed creatures couldn't cut it, but another could, feel free to mention them.
EDIT: The Fallout Option should say, "No, Fallout's Crapsack World would win"
The Borg would likely ignore the Fallout universe, as by most of the canon I know they're only interested in useful technological uniqueness. Fallout doesn't have enough tech to warrant anything other than a cursory look. Same goes for the Zerg, as they usually only assimilate new species that can actually be of use (ie turning the screamer species into mutalisks), and most of the Fallout universe contains things that are simply too genetically corrupted to be of use.
The Tyranids however would gobble that shit up like popcorn, as all they care about is biomass. Doesn't matter how corrupt or technologically backwards it is, the Hive Mind would have the whole planet stripped to the literal bone within a month, with the few scattered forces on it not even registering as a speed-bump.
Though to be honest, if we're talking about a simple "who would win" scenario, any of the three species would hand the Fallout world it's butt on a platter. The Post-Apocalypse isn't really known for strong military strength.