Dungeons and Dragons is a role-playing fantasy game where players embark on quests, solve puzzles, and defeat enemies together. Each game is lead by a Dungeon Master (DM) who tells the story and enforces the rules of the game. The other players take turns rolling d20 dice to determine the actions they can do. Players can invent elaborate backstories and dialogue for their characters, while the DM describes the environment and voices the enemies and allies they encounter. D&D can be played in person with a board game set or online through websites like Roll20.