Aliens is an American science fiction-action horror movie released in 1986. It is a science fiction movie because it takes place in outer space and there are alien creatures. It was directed by James Cameron and stars Sigourney Weaver, Michael Biehn and Lance Henriksen. Aliens is a sequel to Alien (1979) and was followed by two more sequels; Alien³ (1992) and Alien: Resurrection (1997).
This one is different than the original movie because instead of it being just a horror movie, it has more action in it and there is more than one alien in it, as said in the title of the movie.