Brian Blume (January 12, 1950 - March 27, 2020) was an Oak Park, Illinois-born game designer and cartographer who was instrumental in helping to start the game company TSR. Tactical Studies Rules was formed in 1973 as a partnership between Gary Gygax and Don Kaye. Brian Blume and Dave Arneson soon joined them. When Don Kaye died of a stroke in 1975, the partnership was dissolved, and Brian Blume and Gary Gygax incorporated the new company as TSR Hobbies, Inc. with Blume and his father having the larger share. With the Blume family controlling the larger share, Gygax became a figurehead with Brian Blume as the president of creative affairs. He attended Wabash College" In the nmid-1980s, he sold his share of the company just before Gygax sold his remaining stock and left TSR in 1985.
He passed away on Friday, March 27, 2020, at a nursing home in Elkhorn, Wisconsin, of Lewy Body Dementia and Parkinson's disease.