Started as a role-playing game author in the mid 1980s. By 1990 he had become a full time writer, and had authored or coauthored over one hundred books, including twelve novels, before his death. He wrote for most game companies in the industry, including TSR, but is perhaps best known for his game products and fiction for FASA's Shadowrun game. He got his start writing for Dungeons & Dragons, and won a 1992 Origins Award for GURPS Illuminati. In 1995 he was inducted into the Origins Awards Hall of Fame