Seasons of Dimension 20 alternate between a "permanent" cast of six players, called the Intrepid Heroes, and a changing cast of four to six guest players. For its Fantasy High live shows, part of the cast starred alongside guest players. For its Misfits and Magic live show, the cast and GM were made entirely of guest cast. There have been eight seasons with the Intrepid Heroes, and thirteen side quests for a total of twenty-one seasons.
Intrepid Heroes
In chronological order, the main cast has starred in:
- Fantasy High (season 1)
- The Unsleeping City (season 3)
- Dimension 20 LIVE/Fantasy High: Sophomore Year (season 4)
- A Crown of Candy (season 6)
- The Unsleeping City: Chapter II (season 8)
- A Starstruck Odyssey (season 13)
- Neverafter (season 16)
- Fantasy High: Junior Year (season 21)
For a list of other games this cast has starred in, see List of Non-Dimension 20 RPG Games Featuring the Main Cast.
- Brennan Lee Mulligan (DM)
- Ally Beardsley
- Brian "Murph" Murphy
- Emily Axford
- Lou Wilson
- Siobhan Thompson
- Zac Oyama
Guest Casts
Escape from the Bloodkeep
- Brennan Lee Mulligan (DM)
- Amy Vorpahl
- Erika Ishii
- Ify Nwadiwe
- Matthew Mercer
- Mike Trapp
- Rekha Shankar
Tiny Heist
- Brennan Lee Mulligan (DM)
- Clint McElroy
- Griffin McElroy
- Jessica Ross
- Justin McElroy
- Lily Du
- Travis McElroy
Pirates of Leviathan
- Brennan Lee Mulligan (DM)
- Aabria Iyengar
- B. Dave Walters
- Carlos Luna
- Krystina Arielle
- Marisha Ray
- Matthew Mercer
Mice & Murder
- Brennan Lee Mulligan (DM)
- Ally Beardsley
- Grant O'Brien
- Katie Marovitch
- Raphael Chestang
- Rekha Shankar
- Sam Reich
Misfits and Magic
The Seven
- Brennan Lee Mulligan (DM)
- Aabria Iyengar
- Becca Scott
- Erika Ishii
- Isabella "Izzy" Roland
- Persephone Valentine
- Rekha Shankar
Shriek Week
Coffin Run
A Court of Fey and Flowers
- Aabria Iyengar (DM)
- Brennan Lee Mulligan
- Emily Axford
- Lou Wilson
- Omar Najam
- Oscar Montoya
- Surena Marie
The Ravening War
Dungeons and Drag Queens
Mentopolis
- Brennan Lee Mulligan (DM)
- Alex Song-Xia
- Danielle Radford
- Freddie Wong
- Hank Green
- Mike Trapp
- Siobhan Thompson
Burrow's End
- Aabria Iyengar (DM)
- Siobhan Thompson
- Isabella "Izzy" Roland
- Rashawn Nadine Scott
- Erika Ishii
- Jasper William Cartwright
- Brennan Lee Mulligan
Live Show Cast
Fantasy High LIVE in Brooklyn
Fantasy High LIVE at RTX Austin
- Brennan Lee Mulligan (DM)
- Ally Beardsley
- Brian "Murph" Murphy
- Emily Axford
- Griffin McElroy
- Siobhan Thompson
- Zac Oyama
Misfits and Magic Live at GenCon 2022
Cast Trivia
- Misfits and Magic - Live! at GenCon is the only Dimension 20 show that does not contain any of the Intrepid Heroes or Brennan Lee Mulligan.
- Brennan Lee Mulligan has appeared in all but two seasons of Dimension 20 as either the DM or a player character. These are Shriek Week and Coffin Run.
- Brennan Lee Mulligan, Aabria Iyengar, and Matthew Mercer have acted as both DMs and player characters on various Dimension 20 campaigns. Gabe Hicks and Jasmine Bhullar have so far only been the DMs.
- After Brennan, Lou Wilson has appeared in the most seasons at a total of eleven. Ally Beardsley, Zac Oyama and Siobhan Thompson tie for third, as they have appeared in ten seasons of Dimension 20, while Emily appears in nine.
- Brian Murphy has only appeared in the eight Intrepid Heroes seasons.
- Aabria Iyengar has featured in six seasons of Dimension 20 either as the DM or player.
- Erika Ishii appears in five seasons of Dimension 20, but only as a player.
- Rekha Shankar, Matthew Mercer and Isabella Roland have each appeared in three seasons. Rekha and Izzy are exclusively players, and Matt is both a player and DM.
- Five cast members have appeared in two seasons of Dimension 20: Ify Nwadiwe, Lily Du, Carlos Luna, Mike Trapp, and Danielle Radford.
- Thirty one cast members have only appeared in one season of Dimension 20: Amy Vorpahl, Travis McElroy, Griffin McElroy, Justin McElroy, Clint McElroy, Jessica Ross, Krystina Arielle, Marisha Ray, B. Dave Walters, Sam Reich, Katie Marovich, Raphael Chestang, Grant O'Brien, Persephone Valentine, Becca Scott, Dani Fernandez, Gabe Hicks (as DM), Jasmine Bhullar (as DM), Surena Marie, Oscar Montoya, Omar Najam, Anjali Bhimani, Monét X Change, Alaska Thunderfuck, Bob the Drag Queen, Jujubee, Alex Song-Xia, Freddie Wong, Hank Green, Rashawn Nadine Scott and Jasper William Cartwright.
- Griffin McElroy also appeared in the Fantasy High Live at RTX event, alongside some of the Intrepid Heroes.
- Additionally, Brian David Gilbert joined the Intrepid Heroes for the Fantasy High Live In Brooklyn show.
- Becca Scott had a second appearance in Misfits and Magic - Live! at GenCon, along with Markeia McCarty, Noxweiler Berf, and Michelle Nguyen Bradley who all exclusively appear in this show.
Crew
Director
- Michael Schaubach
Creative Director
- Orion D. Black (from The Unsleeping City: Chapter II onwards)
Editors
- Noah Diamond
- Erin Hassidim
- Amielee Easton
- Jonathan Blanton
- Tyler Schuelke
- Jared Nunn
- M Swing
Minis/Sets
- Rick Perry and crew [extra]
Art & Illustration
- Victor Rosas II (Fantasy High, Dimension 20 LIVE, and Pirates of Leviathan, characters)
- Mark Ledgerwood (Fantasy High, Dimension 20 LIVE, Pirates of Leviathan, and The Seven, maps)
- Land Wolf Toussaint (Escape from the Bloodkeep)
- Kendra Wells (The Unsleeping City, and The Unsleeping City: Chapter II)
- Alec Grosso (Tiny Heist)
- Samir Barrett (A Crown of Candy, characters)
- Jon Pintar (A Crown of Candy, map)
- Tucker Donovan (Mice & Murder)
- Adrián Ibarra Lugo (Misfits and Magic, characters)
- William Kirkby (Misfits and Magic, maps)
- Anneliese Mak (The Seven, characters)
- Calum Gillies (The Seven, map)
- Bee Arakaki (Shriek Week)
- Amy Reeder (A Starstruck Odyssey)
- VoodooVal (Coffin Run)