Relic Entertainment released Warhammer 40,000: Dawn of War, a real-time strategy game based on the Warhammer 40,000 universe.
An expansion pack for the original game was released, adding new factions and campaigns.
The second expansion pack, introducing non-linear campaign map and new playable factions, was launched.
The third expansion pack became available, adding two new factions and new campaigns.
Imperial forces discover the Sub-Sector Aurelia, a strategic location rife with valuable resources and Imperial infrastructure, ripe for conflict among multiple factions.
A massive Ork Waaagh! led by Warboss Gorgutz breaks through Imperial defenses and invades the Aurelia sector, threatening Imperial control and destabilizing the region.
The Imperial Guard deploys elite forces led by Lieutenant Erebus to combat the Ork invasion and secure key strategic locations around Aurelia.
The Blood Ravens Space Marines land on Aurelia to assist Imperial forces in containing the Ork threat and to investigate the origins of the conflict.
Chaos Space Marines from the Word Bearers Legion intervene, exploiting the chaos to further destabilize the Imperium’s hold and spread corruption.
A faction of Eldar arrives on Aurelia to retrieve ancient artifacts and technology, complicating the battlefield dynamics among the Imperials, Orks, and Chaos forces.
Climactic battle on the planet Aurelia Prime as all factions collide in a decisive and brutal engagement to control the planet's central hive city and vital resources.
Imperial forces, aided by the Eldar, manage to temporarily seal a Warp Rift that was exacerbating Chaos incursions, stabilizing the region for the time being.
