High Quality Content by WIKIPEDIA articles! Warhammer 40,000: Dawn of War is a military science fiction real-time strategy video game developed by Relic Entertainment based on Games Workshop`s popular tabletop wargame Warhammer 40,000. It was released by THQ on September 20, 2004 in North America. Since its release, three expansion packs have been released: Winter Assault in 2005, Dark Crusade in 2006, and Soulstorm in 2008. The sequel, Dawn of War II was released in February 2009.