In recent years, there has been a storm of new licensed games based on the Warhammer 40,000 IP created by Games Workshop. Warhammer 40,000: Mechanicus is the first to feature the Mechanicum (also known as the Adeptus Mechanicus), an entity in the 40K universe based on Mars and utterly dedicated to the preservation and rediscovery of technology in the 41st Millenium. The Mechanicum is a playable faction in the Warhammer 40,000 tabletop wargame, and is now a computer game!
Source: N4G PC Warhammer 40K: Mechanicus review – ChristCenteredGamer