Dimension 20 is a tabletop role-playing game series created by Dimension 20 and produced by CollegeHumor. It features a group of players who create characters and embark on adventures guided by a Game Master, often using the Dungeons & Dragons system. Each season has a unique setting and storyline, showcasing a mix of humor, drama, and creativity. The series is known for its engaging storytelling and diverse cast, including notable players like Brennan Lee Mulligan and Emily Axford. Episodes are streamed online, allowing fans to enjoy the gameplay and character development in real-time.