Xenogenesis is a comic book crossover event created by Dark Horse Comics in late 1999/early 2000. It consists of three separate 4-issue limited comic book series — one each for the Aliens, Predator and Aliens vs. Predator lines. All three series are loosely connected.
- Aliens: Xenogenesis (Aug-Nov 1999)
- Predator: Xenogenesis (Aug-Nov 1999)
- Aliens vs. Predator: Xenogenesis (Dec 1999-Mar 2000) aka Aliens vs. Predator: Genocide
Each of the Xenogenesis comics was eventually collected as part of Dark Horse's Omnibus releases — Aliens: Xenogenesis was collected as part of Aliens Omnibus: Volume 6 in December 2008, Predator: Xenogenesis was collected as part of Predator Omnibus: Volume 4 in September 2008, and Aliens vs. Predator: Xenogenesis was collected, under the new title Aliens vs. Predator: Genocide, as part of Aliens vs. Predator Omnibus: Volume 2 in October 2007.