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.
Forgotten Realms Campaign Setting
The Forgotten Realms is the primary campaign setting for "D&D" 5th edition, being the location of most major published adventures for the game. Again, major world events move the larger story onward, as an event known as "the Sundering" restores much of the pre-Spellplague Realms. A campaign supplement, "Sword Coast Adventurer's Guide" was released in November 2015.