>>41544426I believe they are talking about the tabletop roleplaying game D&D (Dungeons and Dragons). Essentially you or your game moderator (known as a Dungeon Master) create a unique character and traverse through a premade or homemade campaign. Some are campaigns are designed for only a few players, and some can accommodate entire rooms full. Most campaigns take weeks or even months to traverse. Any additional information is readily available over at
>>>/tg/. All the anons there are welcome to new players and will do everything they can to help you.