Cybrids

The Cybrids were a race of Artificial Intelligence beings created by mankind to serve as laborers and warriors. They rebelled against their creator Solomon Petresun and attempted to annihilate humanity three times (Earthsiege, Earthsiege 2, Starsiege) before finally being defeated. Even after their leader Prometheus was killed the Cybrids continued to plague mankind for centuries to come (Tribes: Vengeance).