Warhammer 40,000: Dawn of War: Soulstorm will be the third and final expansion to the PC-based RTS game Warhammer 40,000: Dawn of War in development by Relic Entertainment. The Dawn of War game and all its expansions are based on Games Workshop's popular tabletop wargame, Warhammer 40,000.
Like Soulstorm's predecessor, Dark Crusade, the expansion is actually a stand-alone product. In single-player, all nine races will be fully playable and active. However, in multiplayer, only the two new races introduced by Soulstorm will be playable. To unlock the seven earlier races, the previous games and expansions that has the corresponding races must be bought. The expansion will feature two new races: the Dark Eldar, and the Sisters of Battle, along with all the old races - Space Marines, Chaos, Eldar, Orks, Necrons, Tau, and the Imperial Guard.