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.
Eric L. Boyd
Boyd used to run a campaign set in the Forgotten Realms, specifically a play by email set in Waterdeep, City of Splendors, revolving around the Waterdhavian nobility called "Hidden Splendors". However, Hidden Splendors is currently on hiatus. More recently he has started up the "Six Swords" campaign set in the Sembian city of Yhaunn.