High Quality Content by WIKIPEDIA articles! Warhammer 40,000: Dawn Of War II - Retribution is the stand-alone second expansion to Warhammer 40,000: Dawn of War II, part of the Warhammer 40,000: Dawn of War series of real-time strategy computer games. Set in Games Workshop`s Warhammer 40,000 fictional universe, the single player campaign is playable with multiple races.