Martin "Marty" O'Donnell (born May 1, 1955) is an American composer known for his work on video game developer Bungie's series, such as Myth, Oni, and Halo. O'Donnell collaborates with his musical colleague Michael Salvatori for many of the scores; he has also directed voice talent and sound design for the Halo trilogy, and was Bungie's Audio Lead.
O'Donnell began his music career writing television and radio jingles as well as scoring for radio and film. O'Donnell moved to composing video game music when his company, TotalAudio, did the sound design for the 1997 title Riven. After producing the music for Myth II, Bungie contracted O'Donnell to work on their other projects, including Oni and the code-named project that would become Halo: Combat Evolved. O'Donnell ended up joining the Bungie staff only ten days before the studio was bought by Microsoft, and has been the audio director for all Bungie projects since.
O'Donnell's score to the Halo trilogy has been called iconic, earning him several awards, and the commercial soundtrack release of the music to Halo 2 became the best-selling video game soundtrack of all time in the United States. His most recently released work is the music for Halo: Reach, released digitally on September 14, 2010 and disc on September 28, 2010.
O'Donnell has been married for more than 30 years to his wife, Marcie, and has two married daughters, Alison and Christine. His children were part of a singing choir for the Flintstones Chewable Vitamins commercials. His father did voice work for Myth as the "Surly Dwarf".
He interacts with his fans on his official fan group on Bungie.net, dubbed "The Marty Army". O'Donnell is a self-described political conservative, and his coworkers at Bungie described him as the most right-leaning employee at the company. Despite his extensive work with Bungie, O'Donnell remains co-owner and president of TotalAudio, although the company has not done any non-Halo work since 2001.