20th Century Fox
"Alien: Covenant."
With "Alien: Covenant" coming out in theaters on Friday, director Ridley Scott is continuing the story of space's most horrific species that he started 38 years ago with his sci-fi classic.Since then, we've been entertained and more than a little scared following the battles franchise hero Ripley (Sigourney Weaver) has had with all sorts of aliens - from the chest-burster in "Alien" to the menaces in "Aliens." Meanwhile, we held back laughter while watching the awful spin-off "Alien vs. Predator" franchise.
Here we look back on all the movies to rank the best "Alien" movie ever: