Dimension 20 is a highly acclaimed actual play anthology series produced by Dropout. Hosted by Dungeon Master Brennan Lee Mulligan, the show features a rotating cast of comedians and performers who engage in complex, high-stakes tabletop role-playing games, primarily using the Dungeons & Dragons 5th Edition ruleset. Each season presents a unique setting, ranging from high-fantasy high schools and noir-inspired underworlds to whimsical food-themed realms and gritty sci-fi dystopias. The series is renowned for its high production value, including elaborate physical battle maps, custom miniatures, and immersive lighting. Beyond the mechanics of the game, Dimension 20 is celebrated for its deep character development, intricate world-building, and the seamless blend of improvisational comedy with profound dramatic storytelling. It has become a cornerstone of the modern actual play genre, fostering a massive community and expanding the boundaries of collaborative narrative media.