Aliens Omnibus: Volume 2 is a trade paperback published by Dark Horse Books on December 12, 2007. It was part of the company's major Omnibus reissue program, which sought to collect and re-release the pre-existing comics from all of Dark Horse's major lines as easily-accessible trade paperbacks. As well as the Aliens comics, similar Omnibus volumes were also released for the Predator and Aliens vs. Predator lines. Volume 2 collects the comics Genocide, Harvest and Colonial Marines.