From the '80s horror film The Thing to the modern masterpiece Project Hail Mary, these are the greatest sci-fi movies that feature aliens.

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

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There are so many important elements that make Ridley Scott's 1979 sci-fi horror film, "Alien," the masterpiece it is. It's in the creature designs that were born out of the nightmares of ...