Blackmoor is a fantasy role-playing game campaign setting generally associated with the game Dungeons & Dragons. It originally evolved in the early 1970s as the personal setting of Dave Arneson, the co-creator of Dungeons & Dragons, first as a setting for Arneson’s miniature wargames, then as an early testing ground for what would become D&D. Blackmoor is one of the longest continuously played fantasy role-playing campaigns in existence.