Alien or Aliens may refer to:
Extraterrestrial life, life which does not originate from Earth
Specifically, intelligent extraterrestrial beings. See List of alleged extraterrestrial beings.
Alien (law), a person in a country who is not a national of that country
Science and technology
Introduced species, a species not native to its environment
Alien (software), a Linux program
AliEn (ALICE Environment), a grid framework
Alien Technology, a manufacturer of RFID technology
Aliens, a newsletter of the IUCN Invasive Species Specialist Group
Alien (franchise), the film franchise, including other sequels
Alien (film), a 1979 film by Ridley Scott
Aliens (film), the 1986 sequel by James Cameron
Alien (creature in Alien franchise)
Alien (soundtrack)
Aliens (soundtrack)
Aliens (novel series)
Aliens (comic book)
The Alien (1960s film), an incomplete 1960s Indian-American film
The Alien (2016 film), a 2016 Mexican film
Alien (band), a 1980s Swedish rock group
The Aliens (Australian band), a 1970s new wave group
The Aliens (Scottish band), a 2005–present rock group
Alien (Strapping Young Lad album)
Alien (Tankard album)
"Alien" (Britney Spears song)
"Alien" (Pennywise song)
"Alien" (Third Day song)
"My Alien", a song by Simple Plan on the album No Pads, No Helmets... Just Balls
"Alien", a song by Bush on the album Sixteen Stone
"Alien", a song by Erasure on the album Loveboat
"Alien", a song by Japan on the album Quiet Life
"Alien", a song by Lamb on the album Fear of Fours
"Alien", a song by Nerina Pallot on the album Dear Frustrated Superstar
"Alien", a song by P-Model on the album Landsale
"Alien", a song by Thriving Ivory on their self-titled album
"Alien", a song by Tokio Hotel on the album Humanoid. Also, fans of the band call themselves Aliens.
"The Aliens", a song by Warlord
Alien (1984 video game), based on the film
Aliens (Tappan Wright novel), a 1902 novel by Mary Tappan Wright
The Alien (Animorphs), the eighth book in the Animorphs series
Aliens (Kaypro video game), a text-only clone of Space Invaders written for the CP/M operating system
Aliens (novel series), an extension of the Alien franchise
The Aliens (TV series), 2016 British sci-fi television series
Alien (shipping company), a Russian company
Alien (literary concept)
Alien Sun (born 1974), Singaporean actress
Alien, a perfume by Thierry Mugler
Alien Wikipedia (Text) CC BY-SA