It's an advanced combiner mod that lets you seamlessly combine almost all community-created races. Unification is the work of the Thudmeizer Mod Team. The impressive Unification mod for Warhammer 40,000: Dawn of War expansion Soulstorm makes a huge number of quality of life changes to Relic's 2004 real-time strategy classic, but most exciting of all is the addition of 17 new races, all playable in multiplayer and against the AI. A new mod has added 17 new races to Warhammer 40,000: Dawn of War.