Brennan Lee Mulligan , who was introduced to Dungeons & Dragons in 1998, owes his exposure to his mom. Rolling the dice on race in Dungeons & Dragons Dungeons & Dragons is one of the most popular tabletop role-playing games of all time. The people he plays with on Dimension 20 are his good friends in real life – Lou Wilson officiated his wedding. “This is the age of Dungeons & Dragons.”Transcript: AILSA CHANG, HOST: The game Dungeons & Dragons started in the 1970s, and it used to be just something people played with friends at home. GREENSTONE: At a recent live show in Seattle, Suz Portillo and her friends all came dressed as their favorite “Dimension 20” characters.