Those unfamiliar with Warhammer 40,000 will get the perfect primer in the game's brief, spectacular, introductory cinematic that shows off a pitched battle between two forces that are bent on ripping each other to shreds--and are well equipped to do so. Dawn of War actually features four of Warhammer 40,000's most popular factions: The tireless and imperialistic space marines, highly versatile warriors who have access to a variety of vehicles as well as terminators, the strongest infantry in the game; the savage green-skinned orks, whose tough forces can vastly outnumber and therefore overwhelm their enemies; the enigmatic and technologically advanced eldar, who are the sneakiest and most maneuverable of the races, and who have access to numerous specialist units; and the traitorous forces of chaos--former space marines who have been warped by demonic energies, and whose strong infantry are assisted by terrifying demonic creatures.