Moore was a resident of Boulder, Colorado, where he worked in the field of computer programming in a number of different capacities, including programmer, systerms operations specialist, and writer of computer games. He was employed as a programmer by Aspen Systems, Inc. He was also a designer of board games. His hobbies included paying computer games and fencing.

Moore died in a car crash. He was survived by his wife. Services were held five days after his death in Denver.

Moore was active as both a fan and a professional writer in the community of Colorado fantasy and science fiction enthusiasts. Initially writing part-time, he had become a full-time writer at the time of his death, primarily for Tor Books. His last work was an unfinished science fiction horror novel, provisionally titled Diggers. He was a member of the Science Fiction and Fantasy Writers of America .

Among Moore's works are three Conan novels and the novelization of the film Kull the Conqueror, all published by Tor Books. He had also contributed in an uncredited capacity to the screenplay of the film and written the short story "10585."

Conan novels

• Conan the Hunter (1994)
• Conan and the Shaman's Curse (1996)
• Conan and The Grim Grey God (1996)

Other novels

• Kull the Conqueror (1997)
• Diggers (unfinished and unpublished)

Short stories

• "10585" (1984)