One of the very best theories for Alien: Romulus 2 could turn it into the ultimate set-up for a potentially awesome Alien vs. Predator movie.

For your extraterrestrial viewing needs, Stacker ranked the top 30 alien movies, according to their IMDb user rating.

Add Yahoo as a preferred source to see more of our stories on Google. Alien first-contact stories are a classic of science fiction, and they're all the more fascinating because they can feel like ...