Aliens: Outbreak, originally titled Aliens and also known as Aliens: Book One and Aliens, Vol. 1: Outbreak, is a six-issue limited comic book series that was first published bi-monthly by Dark Horse Comics from July 1988-July 1989. It was the first comic in the now extensive Aliens comics line (not counting the comic adaptation of the film Alien, which was released several years previously but is not associated with Dark Horse). Originally published in black and white, the story was written by Mark Verheiden, illustrated by Mark A. Nelson and Ron Randall, inked by Nelson, lettered by Willie Schubert and edited by Randy Stradley, with cover art by Nelson. The series was released alongside the tie-in short story Aliens: Theory of Alien Propagation, produced by the same creative team, and was