The Mass Effect 3 Soundtrack was composed by Sascha Dikiciyan & Cris Velasco, who composed the scores for Mass Effect 2 DLC packs Kasumi's Stolen Memory and Arrival; Sam Hulick, who worked on the scores for Mass Effect and Mass Effect 2; Christopher Lennertz, who composed the scores for Mass Effect 2 DLC packs Overlord and Lair of the Shadow Broker; and Clint Mansell, known for scoring films such as Requiem for a Dream and The Fountain. Faunts returned to provide a song for the credits, "Das Malefitz", after an absence from Mass Effect 2.

Mass Effect and Mass Effect 2 Composer Jack Wall did not return for Mass Effect 3, however several tracks from the previous games do return, though they are not included on the soundtrack.
The soundtrack was initially available only through purchase of the Mass Effect 3 N7 Collector's Edition or Digital Deluxe Edition, though it became available on the iTunes store on April 24, 2012 at a cost of US$6.99.[1]