Armada

This multiplayer Dreamcast game from Metro3D sets the stage thousands of years in the future, after humanity has divided into six subspecies. You can join one of the six races: Terran, Eldred, Nomad, Drakken, Scarab, and Vorgan, each with its own technology. Once you chose your race, it's on to the most important mission -- to save all of humanity before it is completely destroyed by the alien force known as the Armada.