Stream The Dungeon Masters Online Free – Watch Full Movie from Home at 123Movies. . The Dungeon Masters explores the subculture of role-playing games, specifically Dungeons & Dragons, which for over 30 years has offered gamers the chance to escape their mundane lives and participate in a world they might otherwise never experience. Popularity and power are based on creativity and imagination rather than social status or wealth, and success is based not on who you know but on what you do.