Fiction vs Reality: Deadspace vs The Thing

Fiction: Necromorph

Animated dead tissue, various forms, requires specialized strategy to kill.

The story meant to placate you is that it requires an alien artifact, dead tissue and can be stopped by dismembering limbs. 

Reality: The Thing

Living creature, gains memories and abilities via absorption, regenerates from separated pieces, requires additional effort to ensure complete destruction.

The reality is a dire and terrifying vision where no amount of trauma can stop it from surviving and coming after you.

Fiction vs Reality: Deadspace vs The Thing