
The primary concept that makes the Xenomorphs so frightening is how devastatingly efficient they are. If one got inadvertently loose on earth, we'd be megafucked, regardless of the century. The only thing that can effectively contain them is the vacuum of space (and even that has its limits if you include Alien: Romulus in the universal canon).
There's a relatively decent Reddit post that outlines a reasonably realistic response to a Xenomorph outbreak on earth, but I suspect the whole scenario is pretty self-explanatory.
Fucking Disney.
( , Sun 8 Jun 2025, 22:07, Reply)

The Xenomorphs are affected by the law of conservation of ninjutsu.
( , Sun 8 Jun 2025, 22:24, Reply)

if *one* got loose on Earth. 10,000? They would be made of paper.
( , Mon 9 Jun 2025, 15:12, Reply)

( , Mon 9 Jun 2025, 16:34, Reply)