Chainmail
The medieval miniatures wargame that served as the precursor to Dungeons & Dragons, with its fantasy supplement.
Guidon Games
TSR
Core Mechanics
A detailed d6-based wargame with rules for different unit types, morale, and mass combat.
Universe & Setting
A medieval historical setting, with an optional 'Fantasy Supplement' that introduced elves, dwarves, goblins, and wizards.