Planewalker is a fan-created web site for TSR's old Planescape campaign setting. Based in Sigil, City of Portals, the campaign setting was released in 1994 and took players on a grand tour of the Inner, Outer and Elemental Planes, introducing them to realities that are changeable based on philosophy and belief. The web site hosts community forums, and extensive database of Planescape materials, downloadable reference guides, and much more.