Warhammer 40,000: Dawn of War III sets its conflict on Acheron, where the discovery of a catastrophic weapon draws Space Marines, Orks, and Eldar into a battle for survival. Its campaign alternates among these three factions, using their missions to show how their different combat advantages shape the war. The premise is less a story of clear-cut heroes than a struggle among forces with competing aims.
On the battlefield, players command large armies and can deploy towering war machines: the Space Marine Imperial Knight, Ork Gorkanaut, and Eldar Wraithknight. Collectible elite squads add special abilities and bonuses, supporting different attacking strategies, while faction-specific super-abilities range from Orbital Bombardment to the Eldritch Storm and the Orks’ Rokks. The scale of the clashes, set across volcanic terrain and orbital Star Forts, is central to the game’s identity.
The game pairs its alternating-mission campaign with online competitive maps, where players can customize a universal army and take it into multiplayer battles.