Publication of the Role Playing Gamers Association magazine began in the year 1981, targeting players of the "Dungeons & Dragons" roleplaying game. Articles were written by gamers for other gamers in the style of the "Dragon" magazine, and information was included on RPGA membership and events. The magazine was nominally quarterly from May, 1981 through February, 1982; bimonthly from April, 1983 through May, 1991; and monthly from June, 1991 through November, 1996; publication then ceased until October, 1997, and thereafter was bi-monthly (with some irregularity) through May, 2003; finally it was again monthly from June, 2003 until the final issue in August, 2004. For several years it was available only to RPGA members; for some, joining the RPGA essentially amounted to a subscription to "Polyhedron". "Polyhedron" was produced by RPGA members (some of whom were professionals in the game industry) for RPGA members.