Who was a creator of a science-fiction role-playing game along with Phil McGregor and an American game designer, notable for his work on "Space Marines" ?
A. Mark Ratner A. Mark Ratner (born November 1948 in New Jersey ) is an American game designer, notable for his work on "Space Marines" and Space Opera.
Matt James (game designer) Matt James (born 1981) is an American game designer and a decorated veteran of the United States Army. As a game designer, James is best known for his online and print works for the "Dungeons & Dragons" fantasy role-playing game published by Wizards of the Coast, "Pathfinder" role-playing game by Paizo, and Privateer Press. He has also designed game content for Wolfgang Baur's Kobold Press (formerly Open Design LLC). In 2012 James won an ENnie Award for "" and has been nominated for several Origins Awards. In 2014, James won an ENnie Award for "".