6 Legendary GMs and their Epic Failures

Even legendary Dungeons & Dragons game masters—Matt Mercer, Brennan Lee Mulligan, Aabria Iyengar, and Matt Colville—have made major GM mistakes.
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Even professional Dungeon Masters like Matt Mercer, Brennan Lee Mulligan, Aabria Iyengar, Matt Colville, and others have made critical game master mistakes while running Dungeons & Dragons and other tabletop RPGs. In this video, we break down famous GM failures—including stealing player agency, poor encounter design, ignoring player boundaries, and letting toxic players derail the campaign. These real-world examples from popular actual play shows serve as valuable lessons for anyone running a TTRPG. Whether you're a new GM or a veteran game master, understanding these missteps will help you improve your sessions and avoid common pitfalls. So if you want to level up your game mastering skills in D&D, Pathfinder, or any other TTRPG, this is the video for you.

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