NMS Software was founded by Richard Chappells with some former Elite staff. The NMS stood for Richard's sons; Nicholas, Mark and Simon. A great deal of the games they developed did not have credits, but it is unknown why.
Mark Cooksey was the only composer who wrote music for NMS Software's Game Boy and NES games. He would write his MIDI files with Notator for the Atari ST which he would then convert to his NES sound driver.