The summer of 1978 was a momentous one for TSR. At the Origins Game Fair, held in Ann Arbor, Michigan on July 13–16, the company released Gamma World. A little over a month later, on August 17–20, TSR unveiled the Advanced Dungeons & Dragons Players Handbook. I can't tell you how much time I spent as a younger person poring over both of these. I imagine I wasn't the only one.