MASS EFFECT is a series of military science fiction, action, RPG video games from BioWare begun in 2007. In 2183, humanity in the Milky Way galaxy is threatened by the Reapers, a highly advanced machine race. Gamers combat an all-out galactic invasion. The game received critical acclaim for its interactive storytelling and cinematic design. Dark Horse has published several series of comic books expanding on the Mass Effect storyline.