This is Supplement I of what was originally released as "Additional Rules for the Fantastic Medieval Wargames Campaigns Playable with Paper and Pencil and Miniature Figures," what would later become the figure-head and mainstay of tabletop roleplaying games, Dungeons & Dragons. The staple-bound booklet features original art and illustration, as well explanations of Monster attributes and experience point progression in the Grehawk Campaign. 12th Printing. Permanent plastic wrap fixed to booklet with moderate toning. Text on front of cover wrap has excessive ink bleeding, evident on inside of cover with a faded unicorn stamp and ink print. Minor foxing to page edges.