Dimension 20 is an American actual playtabletop role-playing game show created by Brennan Lee Mulligan for independent streaming service Dropout. It is an anthology series, with each season telling its own isolated story, mostly with a recurring cast of players. The main cast features Mulligan as the DM alongside fellow Dropout cast members Emily Axford, Ally Beardsley, Brian Murphy (Murph), Zac Oyama, Siobhan Thompson and Lou Wilson. This cast of players are known as the "Intrepid Heroes", while seasons without this core group in full are called "Side Quests". The latest season is Gladlands, which aired between January 7 to February 11, 2026. Mulligan has confirmed two more seasons which will feature the Intrepid Heroes.[1]
Set in Elmville, an odd, anachronistic town resembling a high-fantasy John Hughes movie. "The Bad Kids" attend freshman year at high school Aguefort Adventuring Academy, which teaches students to become adventurers.
The show's first "side quest" season, a parody of The Lord of the Rings. A cast of villains try to hide the death of their Sauron-esque leader from the rest of his evil armies.
A campaign set in a magical version of modern-day New York City, where a group of New Yorkers protect its residents from knowing about the underlying magic in their city.
A continuation of Fantasy High. The Bad Kids leave Elmville to retrieve the Crown of The Nightmare King for 60% of their final grade. Streamed on Twitch as "Dimension 20 LIVE", then edited for Dropout. The campaign was the first to use "theater of the mind", not battle minis or sets. The two-part finale was recorded remotely due to Stay at Home orders during the COVID-19 pandemic.
In a city built into the walls and garden of a suburban house, a crew of "tiny people" (bugs, fairies, living toys, etc.) try to pull off a heist against a crime lord. Inspired by The Borrowers and Toy Story, and featuring the McElroys from The Adventure Zone.
Zac Oyama as Chancellor Lapin Cadbury & Cumulous Rocks
Set in a Candy Land-inspired kingdom of Candia in a Game of Thrones-inspired setting of violence and political intrigue. Pre-recorded episodes, followed by a new live after-show with the cast (known as Adventuring Party) were released every Wednesday until the season finale.
In the same universe as Fantasy High, a group of pirates band together to prevent an evil insurance company from destroying their floating pirate city of Leviathan. This was the first campaign to be completely recorded remotely during the COVID-19 pandemic.
Three years after The Unsleeping City, the Dream Team reunites, with two new members, to stop internet-based media corporation Gladiator from destroying the balance between Dream and Waking Worlds. The remotely-recorded campaign used virtual tabletop Roll20 instead of physical dice, sets and figurines.
An Edwardian murder mystery campaign inspired by Sherlock Holmes, set in a world where characters are anthropomorphic animals, in the same vein as The Wind in the Willows, attending the birthday party of a wealthy estate owner. Recorded remotely.
A parody of Harry Potter with American exchange students at a British magical academy. The campaign uses the Kids on Brooms system, and is the first with a guest GM, and first in‑studio after the COVID-19 pandemic.
The Seven Maidens, an adventuring party formed after the events of Fantasy High: Freshman Year, must go on a dangerous quest to prevent their party from being disbanded when their senior-year members graduate. The campaign used digital tabletop system TaleSpire for encounters and battles.[20]
Monstrous "children of horror icons" find love and investigate a mystery in their first week as seniors at prestigious monster/human learning institution Bram University.[21] Uses the Mythic system created by guest GM Gabe Hicks.
A campaign in the sci-fi Starstruck universe, which was co-created by Elaine Lee (Mulligan's mother) and Michael Kaluta, following the adventures of a crew of a ragtag space ship trying to save the galaxy. It uses the Star Wars 5e role-playing system.
A comedic vampire road trip where Dracula's entourage must return a nearly-dead Dracula to Transylvania – or die. The game uses a modified version of D&D 5th Edition.
In a Regency era-inspired Fae Court, several of the realm's most prestigious aristocrats attend an event known as the Bloom. It utilizes 5e and Good Society game systems.
Marketed as "the horror season," featuring classic fairy tale characters whose stories have become twisted and violent as their land, the Neverafter, is corrupted by dark forces.
A prequel to the previous campaign A Crown Of Candy set 20 years earlier, in which a disparate group of nobles are blackmailed into furthering the aims of a mysterious religious sect as the land of Comida slides into civil war.
A continuation of the original Fantasy High campaign. The Bad Kids struggle with their academic workload while investigating a rival adventuring party. This season features more elaborate projections made by season artist Cait May, along with a theme song by Sarah Barrios.
A group of strip mall employees are sucked into a magic VHS tape, becoming characters in an '80s action movie, and must find a way to escape. The game uses a home-brewed system, titled Never Stop Blowing Up, which is based on the Kids on Bikes system.
A continuation of the original Misfits and Magic campaign set three years later, in which the pilot program members reunite to investigate the disappearance of magic from the world. The campaign uses the Never Stop Making Magic system which is a custom mix of the Kids on Brooms system and Dropout's Never Stop System.
A Mad Max inspired game set in a post-apocalypse where people survive on kindness and joy. The game uses a modified version of the Kids on Bikes system.
A series of six live non-canonical Dimension20 events titled "Time Quangle" was held in Ireland and the United Kingdom in April 2024. At the start of each live show, performers (the "Intrepid Heroes") rolled dice to determine the characters and setting, pulling randomly from five past Dimension20 campaigns: Fantasy High, The Unsleeping City, A Crown of Candy, A Starstruck Odyssey, and Neverafter.[49][50][51] Dropout recorded each performance and released them in late 2024 as a six-episode non-canonical "Time Quangle" series.[49]
↑The first four seasons are also available in full on YouTube, along with the premiere episodes of every season.
↑Two live episodes were also recorded and are listed on Dropout as part of the first season, for a total of 19 episodes. One of these guest stars Griffin McElroy.
↑"Dropout releases official trailer for Dimension 20: Never Stop Blowing Up". Rascal News. June 5, 2024. Archived from the original on June 5, 2024. Retrieved June 6, 2024. In a comment to Rascal, a spokesperson confirmed that the game will be played using a system called Never Stop Blowing Up—a homebrewed system heavily inspired by Hunters Entertainment's Kids on Bikes
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