Dimension 20

Everything About Fiction You Never Wanted to Know.
Title card

Dimension 20 is CollegeHumor's tabletop RPG show that runs Dungeons & Dragons 5e campaigns, of which there are:

Brennan Lee Mulligan DMs for all the campaigns and the main cast includes Lou Wilson, Siobhan Thompson, Zac Oyama, Emily Axford, Brian "Murph" Murphy, and Ally Beardsley.

Guest players include:

  • Matt Mercer (Escape from the Bloodkeep and Pirates of Leviathan)
  • Erika Ishii (Escape from the Bloodkeep)
  • Justin McElroy (Tiny Heist)
  • Travis McElroy (Tiny Heist)
  • Carlos Luna (Pirates of Leviathan)
  • Marisha Ray (Pirates of Leviathan)

There were also two oneshot Fantasy High live events in Brooklyn and Austin which invited guest players Brian David Gilbert and Griffin McElroy respectively. A live Fantasy High oneshot was broadcast in October 2020 featuring half of the cast (Lou, Zac, and Murph).

Tropes used in Dimension 20 include:


  • Born Unlucky: Downplayed. Murph commonly rolls natural ones or otherwise low numbers when performing skill checks or saving throws.
  • It Amused Me: Emily sometimes baffles everyone (including Brennan) with her character choices. Examples include the Sexy Rat and Hilda Hilda incidents.
  • Million-to-One Chance: When a pivotal story moment is determined by a die roll, Ally is almost guaranteed to roll a natural 20.