The second expansion to Dawn of War includes all-new, explosive Dawn of War single-player action play, new multiplayer content, and two new playable races including the technologically devastating Tau. In addition to the two new playable races, Dark Crusade will feature an all-new single player campaign centering on the conquest of a "meta-map," with each territory captured giving tangible rewards to the occupying force. Also featured is a greatly expanded multiplayer component and a completely unique economy model for the Necrons. Warhammer 40K: Dark Crusade is also a stand-alone expansion -- it adds bonus content to Dawn of War and Winter Assault, but it can also be played on its own without needing a copy of the original game.