I have seen several of the Alien movies and Prometheus but in none of them do they ever mention anything of the alien's home planet. Recently a friend claimed that they came from a far away planet where they were the bottom of the food chain and fled to survive. Is this true? If not where did they come from?

  • Having spent a bit of time searching, I don't believe there are any official source for the alien homeworld. Feb 6, 2013 at 6:43
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    From the commentary on Alien, the xenomorph are bio-engineered, and thus have no home planet. Feb 6, 2013 at 10:17
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    Didn't Prometheus explain that they were engineered? Feb 6, 2013 at 20:50
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    I'd hate to see the planet where xenomorphs are the bottom of the food chain!
    – SteB
    Feb 7, 2013 at 8:30
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    Prometheus didn't really explain anything. Jul 14, 2013 at 19:54

1 Answer 1


In Prometheus, the crew posit that the Engineers created the black goo that (at the end of the film) gave rise to a Xenomorph.

As the Xenomorph's are bio-engineered they have no home world, though the black goo that they eventually evolved from was probably originally created on the planet in Prometheus (certainly much of the research/experimentation appeared to be done there, probably safely away from the Engineer's home world) then that planet (LV-223) could be considered to be their home world in the sense of "their planet of origin".

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    I believe nothing gets really explained in Prometheus. What the Engineers wanted to do with the black goo, whether the xenomorph was a intentional byproduct, whether the black goo is a bioweapon, whether the black goo was actually engineered by the Engineers. For all we know the black goo is a naturally occurring substance. The human crew speculates a lot, but they don't come to any actual conclusions, do they?
    – Andres F.
    Jan 11, 2014 at 5:18
  • There is a Xenomorph homeworld: Xenomorph Prime
    – Aogiri
    Nov 24, 2016 at 7:23

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