Starsiege Tribes is a team-oriented multiplayer first person combat game based in the Starsiege Universe. The player created as well as the storyline factions are divided into Tribes, dominated by the Four largest, the Blood Eagle, Diamond Sword, Starwolf, and Children of the Phoenix. There are vast numbers of Independent Tribes that are not affiliated with one of The Four as well as numerous non-tribal entities such as Grievers, Imperials, and others.