Planescape

Planescape is a campaign setting for the Dungeons & Dragons fantasy role-playing game, originally designed by Zeb Cook. The Planescape setting was published in 1994. As its name suggests, the setting crosses and comprises the numerous planes of existence, encompassing an entire cosmology called the Great Wheel, as originally developed in the Manual of the Planes by Jeff Grubb. This includes many of the other Dungeons & Dragons worlds, linking them via inter-dimensional magical portals.

Development

Planescape is an expansion of ideas presented in the Advanced Dungeons & Dragons Dungeon Master's Guide (First Edition) and the original Manual of the Planes. When Advanced Dungeons & Dragons 2nd edition was published, a decision was made not to include angelic or demonic creatures, and so the cosmology was largely ignored, being replaced (to a certain degree) by the Spelljammer setting. However, fan demand for a 2nd Edition Manual of the Planes was strong enough to justify its expansion into a full-fledged campaign setting, and so in 1994 Planescape was released.