For Mass Effect 3, Bioware brought on Golden Globe winning composer Clint Mansell, famous for films like Moon, Black Swan, and The Wrestler. However, Mansell is BEST known for the amazing score to Requiem for a Dream. Not that the scores for Mass Effect 1 and 2 were bad, far from it. But for a finale on the scale of Mass Effect 3, you need someone epic, and Clint Mansell has proved over and over again that epic is his middle name. Clint Epic Mansell.