Star Wars: Enemy of the Republic - Dark Side
Weaponized Life Form
Xenomorphs are an abandoned Sith creation, part of an original concept to create a weaponized life form. Built to be dropped on a planet and used to wipe out all terrestrial life, they proved to be far too effective at this task and were sealed away in a vault by a long forgotten Sith Lord. Unfortunately, a group of miners found them in some of their exploration. The excavation was wiped out, leading to a tremendous population boom for the xenomorphs, until they and their queen were destroyed by a group of Sith.