Alien

The Alien franchise depicts a series of deadly encounters, predominantly spanning the 22nd and 24th centuries, between humanity and the Xenomorph; a hostile, endoparasitoid, extraterrestrial species, also known as Alien. Humanity is depicted as a space-faring species with an interstellar dominion; space journeys typically last months, even years, and require the use of cryosleep. Throughout the series, characters are repeatedly manipulated and endangered by the unscrupulous megacorporation Weyland-Yutani Corp, which seeks to profit from the Aliens.

Unlike many other extraterrestrial races in film and television science fiction, the aliens are not sapient toolmakers — they lack a technological civilization of any kind, and are instead primal, predatory creatures with no higher goal than the preservation and propagation of their own species by any means necessary, up to and including the elimination of other lifeforms that may pose a threat to their existence.