In a historic transition for the actual-play giant, Critical Role announced that Brennan Lee Mulligan will serve as the Game Master for its fourth campaign, marking the first time in the series’ decade-long history that co-founder Matthew Mercer will step down from the GM chair. The shift, revealed during a live show in Indianapolis, signals a major evolution for the multimedia franchise as it prepares to launch its next chapter on October 2.

A New Era for Critical Role
Since its inception in 2015, Matthew Mercer has been the architect behind all three of Critical Role’s primary campaigns. His successor, Brennan Lee Mulligan, is a widely respected figure in the tabletop community, best known for his work as the dungeon master of Dimension 20. While Mulligan’s appointment was met with thunderous applause from the live audience, the announcement has sparked a complex mix of reactions across the fandom, as viewers grapple with the end of a ten-year tradition.
Beyond Exandria: A Fresh Start
Beyond the change in leadership, the production confirmed that Campaign IV will move away from Exandria—the high-fantasy setting that hosted the previous three campaigns—to introduce an entirely new world. While long-time fans are mourning the departure from the setting they have followed for a decade, this pivot serves as a strategic move to lower the barrier to entry for new viewers who may have felt intimidated by years of dense lore.
Community Response and Parasocial Friction
The transition has highlighted the deep parasocial attachments formed by the community over the last ten years. While many fans have embraced the change, noting that the grueling schedule of a GM role is a heavy burden for Mercer to carry, others have found the simultaneous changes in leadership and setting to be jarring. Supporters of the move are quick to point out that this break will allow Mercer to return as a player, potentially bringing a refreshed energy to future stories.
The Vision Behind the Change
Critical Role CEO and cast member Travis Willingham addressed the decision in a statement to Variety, emphasizing the need for creative evolution. “We’ve been enormous fans of Brennan’s for many years now, and when it came to giving both Matthew Mercer and the world of Exandria a bit of a breather, Brennan felt like the perfect storyteller to take our community somewhere entirely new,” Willingham stated. He further praised Mulligan’s infectious passion for worldbuilding and his deep-rooted commitment to the tabletop medium.
Mulligan’s Future and Campaign Launch
Following the announcement, Mulligan took to social media to share his excitement, confirming that he will continue his ongoing commitments with Dimension 20 and the improv network Dropout. With the transition finalized, the community now turns its attention to October 2, when the fourth campaign officially begins its run.
