Including the Imperial Guard from Dawn of War's first expansion pack Winter Assault, this means a total of seven playable races in this expansion. The expansion features two new races, the Tau Empire and the Necrons.
Based on Games Workshop's popular tabletop wargame, Warhammer 40,000, Dark Crusade was released on October 9, 2006. Warhammer 40,000: Dawn of War - Dark Crusade is the second expansion pack to the PC-based real-time strategy (RTS) game Warhammer 40,000: Dawn of War developed by Relic Entertainment and published by THQ.