In the Dungeons & Dragons (D&D) role-playing game, the Dungeon Master (often abbreviated as DM) is the game organizer and participant in charge of creating the details and challenges of a given adventure, while maintaining a realistic continuity of events. In effect, the Dungeon Master controls all aspects of the game, except for the actions of the player characters (PCs), and describes to the players what they see and hear. The title was invented for the TSR Dungeons & Dragons RPG, and was introduced in the second supplement to the game rules (Blackmoor). To avoid infringement of TSR's trademarks...