Emerging from the Organic Theater Company in Chicago, where he performed and helped produce the hybrid improv-LARP show “Dungeon Master” from 1983 to 1987, Bruce A. Young built a foundation that bridged stage, television, and film. His early work included writing for the sitcom E/R and later for the fantasy feature The Lord Protector: The Riddle of the Chosen, while he also revived “Dungeon Master…