Martin Iveson joined Core Design as an in-house musician in 1991. He worked on several titles, including Heimdall, Jaguar XJ220, Chuck Rock, the Thunderhawk and Fighting Force series, and Herdy Gerdy. His soundtracks cover a vast amount of genres, from electronic to rock to pop to trip hop and more. Iveson left the company sometimes around 2003.

Iveson is also known as "Atjazz", a house/hip hop/jazz musician. He actually created his own label, Mantis Recordings, in 1996 and released a few albums so far. Not working in the gaming industry anymore, he now completely concentrates on his solo career.