Gameplay in Brief:
The Dungeon Master's Guide. The Monster Manual. These books are core parts of the world of Dungeons and Dragons, in which players take on the roles of wizards, warriors, clerics, bards, illusionists, and more, trying to find treasure and improve their characters' strength.
One player serves as the Dungeon Master, narrating the game and controlling the monsters which the other players will face during the adventure. Countless books, supplements, and other game materials have been published through the years.