Iron Lore Entertainment (Titan Quest) took on the development of the third Dawn of War expansion, Soulstorm, published by THQ. Soulstorm also doesn’t require the base Dawn of War in order to play it. Soulstorm’s gameplay is the same non-linear style as Dark Crusade, and involves an interstellar conflict over the sudden appearance of a Warp Storm. This expansion adds two new armies (Sisters of Battle, Dark Eldar), and adds new flying units to each faction.
Soulstorm is available on Steam.