In the fall of 1978, Johnson responded to an ad in
Dragon magazine for a job as a games editor at the magazine's publisher,
TSR. He was not selected for the job after the interview, but applied for another job with TSR as a game designer, but instead TSR hired him as an editor. His first assignment was as a copy editor on the original
Dungeon Masters Guide, to which he also contributed some rules. He also began working on a tournament module which would later become C1,
Hidden Shrine of Tamoachan. "That was to prove to the company I could write." Harold Johnson designed the modules
The Hidden Shrine of Tamoachan (1980), and
Secret of the Slavers Stockade (1981), and also wrote the IJAC1 ''
Judge's Survival Pack, and IJ4 The Golden Goddess'' for the
Indiana Jones role-playing game. He was part of the design team for several early
Dragonlance modules and products. He also worked on other product lines, such as
Forgotten Realms,
Spelljammer, and
Ravenloft, and worked as an editor and project coordinator on numerous D&D products throughout the 1980s and 1990s, and provided some design contributions early in the game's third edition. ==References==