Brennan Lee Mulligan is a prominent tabletop role-playing game (RPG) designer and storyteller, known for his engaging gameplay and creative narratives. He is a co-founder of the popular web series Dimension 20, which showcases various RPG campaigns, blending humor and drama in a unique format. In addition to his work on Dimension 20, Mulligan has contributed to the RPG community through various projects and collaborations. He is recognized for his ability to create immersive worlds and memorable characters, making him a respected figure among fans and fellow creators in the gaming industry.