TSR, Inc.
In the mid-1970s, Mentzer and a friend taught themselves how to play the new
role-playing game Dungeons & Dragons, and he became part of a group of eight to twelve players who played several times a week. In 1979,
TSR, the company that published D&D, advertised for a designer and an editor. Although Mentzer was initially uninterested since he had no editorial or design experience, fellow player David Axler, who would go on to write an article for the December 1981 issue of
Dragon magazine about how to determine the weather in the
World of Greyhawk campaign setting,—urged him to apply. Mentzer finally relented
Mike Carr of TSR had been contemplating starting a TSR-sponsored D&D fan club. Shortly after Mentzer won the DM Invitational, Carr approached him about taking on that task. Mentzer agreed to form some sort of group but, rather than a simple fan club, he was interested in promoting better quality role-playing, especially during scored D&D events at conventions. Mentzer felt that the system as it stood rewarded those players that stayed quiet at the table, in effect punishing good role-players. He came up with a scoring system where the dungeon master and the players all voted on who had been the best role-player at the table. Mentzer wrote four RPGA tournament adventures set in his home campaign setting of "Aquaria", which he had been running since 1976; Mentzer became involved with the auction of hobby gaming materials at Gen Con in 1983, and was involved with what is now called the world's largest game auction every year until retiring after Gen Con 50 in 2017. Mentzer was soon promoted to Creative Director at TSR, and one of the tasks he was given was to collate and revise the various rules sets for
Basic D&D in such a way that no rules, monsters, or other material that had been developed specifically for
Advanced Dungeons & Dragons (
AD&D), were borrowed. Mentzer's third edition of the
D&D Basic Set (1983) was used to launch a series of five rules boxed sets that ultimately allowed characters to advance from first level to godhood. Further annual editions were planned, but when Mentzer left TSR, the project was shelved. Mentzer expanded
Gary Gygax's
Village of Hommlet adventure into the
adventure module T1-4
The Temple of Elemental Evil (1985), the first of a new format of 96-page to 128-page squarebound paperback supplements, which allowed more space to detail settings and adventures. Mentzer worked closely with Gygax on that module, as well as the accessory
The Book of Marvelous Magic (1985). ==New Infinities Productions, Inc.==