Forgotten Realms
The "Campaign Set" (often referred to as the "Grey Box") was later released in 1987 as a boxed set of two source books ("Cyclopedia of the Realms" and "DM's Sourcebook of the Realms") and four large maps, designed by Greenwood in collaboration with author Jeff Grubb. The set introduced the campaign setting and explained how to use it, and reserved space on the map for SSI's Gold Box computer role-playing games set in the Forgotten Realms.
Dungeons &amp; Dragons campaign settings
The lands of the Forgotten Realms are not all ruled by the human race: the setting's planet, Abeir-Toril, is shared by humans, dwarves, elves, goblins, orcs, Dragons and other peoples and creatures. Technologically, the world resembles pre-industrial Earth of the 13th or 14th century. However, the strong presence of magic provides an additional element of power to the societies.