Matthew Mercer upended Brennan Lee Mulligan’s plans in Critical Role Campaign 4 debut

GG Brief Editorial Desk · AI-assisted, source attributed

Critical Role launched Campaign 4 with Brennan Lee Mulligan as its new Dungeon Master and a 13-player, West Marches-style format set in the new world of Aramán. In the first episode, longtime series figure Matthew Mercer — now a player — diverted expected events and forced Mulligan to change his prepared storyline. That early disruption reshapes the campaign’s direction and highlights the greater unpredictability and player-driven storytelling of this season.

• Brennan Lee Mulligan is the new Dungeon Master for Critical Role Campaign 4.
• Campaign 4 uses a West Marches-style structure and features a 13-player cast.
• The campaign introduces a new setting called Aramán.
• Matthew Mercer, participating as a player, disrupted the DM’s prepared plan in episode one, forcing immediate adaptation and altering the season’s trajectory.