"Homeworld" inspired a series of real-time strategy games in the same universe, beginning in September 2000 when Sierra Studios released a stand-alone expansion by Barking Dog Studios, '. Taking place 15 years after the events of "Homeworld", the story centers on Kiith Somtaaw—a Hiigaran clan—and its struggles to protect Hiigara from a parasitic entity known as the Beast. A full sequel, "Homeworld 2", was developed by Relic Entertainment and released by Sierra in late 2003. The game, set a century after the original "Homeworld", pits the Hiigarans against a powerful, nomadic raider race called the Vaygr. A fourth game in the series, ', was developed by Blackbird Interactive and published by Gearbox Software in 2016. A prequel to the series, it is set on the planet of Kharak instead of in space, and features a war between Kushan clans during the discovery of the buried spaceship from "Homeworld". Gearbox announced the fifth game in the series, "Homeworld 3", on August 30, 2019; the game development is being crowdfunded through Fig, and is slated for a Q4 2022 release. Additionally, in 2003 Relic released the source code for "Homeworld" under license to members of the Relic Developer Network. The source code became the base of several source ports to alternative platforms, such as Linux.