The planes of the Dungeons & Dragons roleplaying game constitute the multiverse in which the game takes place. Each plane is a universe with its own rules with regard to gravity, geography, magic and morality. There have been various official cosmologies over the course of the different editions of the game; these cosmologies describe the structure of the standard Dungeons & Dragons multiverse.

Deities & Demigods, alternatively known as Legends & Lore, is a reference book for the Dungeons & Dragons fantasy role-playing game (D&D). The book provides descriptions and game statistics of gods and legendary creatures from various sources in mythology and fiction, and allows dungeon masters to incorporate aspects of religions and mythos into their D&D campaigns.