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Critical Role Appoints Brennan Lee Mulligan as Game Master for Campaign 4

Debuting October 2, the fourth campaign will introduce a new setting with its game system still to be announced.

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© Critical Role
Critical Role's Matt Mercer is relinquishing control of their fourth campaign to D20's Brennan Lee Mulligan.

Overview

  • Brennan Lee Mulligan has been confirmed as the sole Game Master for Campaign 4, succeeding founding GM Matthew Mercer.
  • Campaign 4 will begin airing live on October 2, 2025.
  • The upcoming series will break from Exandria lore to explore an entirely new narrative world.
  • Critical Role has not yet decided whether Campaign 4 will use Dungeons & Dragons or its proprietary Daggerheart system.
  • This leadership and worldbuilding overhaul underscores Critical Role’s strategy to broaden its creative leadership and diversify its offerings.