|Aliens: Once in a Lifetime|
|Written by||Mark Schultz|
|Illustrated by||Rick Leonardi|
|Cover(s) by|| Rick Leonardi|
|Edited by||Randy Stradley|
|Publisher||Dark Horse Comics|
|Release date(s)||Feb 1999|
|Preceded by||Aliens: Wraith|
|Concurrent||Aliens: Apocalypse - The Destroying Angels|
|Followed by||Aliens: Xenogenesis|
Aliens: Once in a Lifetime is a comic book short story that was first published by Dark Horse Comics in the anthology series Dark Horse Presents, Vol. 1 #140, in February 1999. It was written by Mark Schultz, illustrated by Rick Leonardi and edited by Randy Stradley. The issue of Dark Horse Presents also featured an Aliens cover drawn by Leonardi and inked by Bob Wiacek. The black-and-white comic serves as a tie-in to the four-issue series Aliens: Apocalypse - The Destroying Angels (also written by Schultz).
This month Aliens takes the spotlight in a tale from writer Mark Schultz and artist Rick Leonardi that ties in with Schultz's current series Aliens: Apocalypse.
Like the miniseries it ties into, the story attempts to flesh out the Aliens' backstory and proposes a notion on their adaptability.
Aliens: Once in a Lifetime was eventually collected as part of Aliens Omnibus: Volume 6 in December 2008.
The comic was released digitally through Dark Horse Digital on August 14, 2013, collected with Aliens: Border Lines, Aliens: 45 Seconds and Aliens: Elder Gods and reusing John Bolton's cover art for the novel Aliens: Labyrinth.