The expansion features two new races, the Tau Empire and the Necrons. Based on Games Workshop's 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 to the Real-time strategy video game Warhammer 40,000: Dawn of War developed by Relic Entertainment and published by THQ.
