There's also no sentient aliens, super-mutants, or anything like that. The universe is literally "Firefly, but with Evil Corporations instead of Evil Government". The only difference is alien wildlife, and they're really just there to give you something to shoot at.

I recently had a Wash "You live on a spaceship dear" moment of skepticism when a character suggested an alien conspiracy. It's always possible they're right, but at the moment I'm leaning towards crazy.

Closest thing I've seen to a supernatural element is a shared hallucination, but that happened after getting high as hell on peyote.