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 Forgotten Realms is a high fantasy world - magic is powerful, legendary monsters are commonplace, and gods often intervene directly in mortal affairs. Players can indulge in several types of fantasy adventures - from straightforward hack-and-slash treasure hunting in dungeons to epic campaigns involving regional wars, cataclysms and direct contact with gods and extra-dimensional beings.