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.
The Avatar Series
The original trilogy had its counterpart AD&D modules, even though these three adventures did not aim to be a precise retelling of the novels and could also be played individually instead of in sequence. These were written by Ed Greenwood, the original creator of the Forgotten Realms line. The published adventures were:The objective of this trilogy was to transition the Forgotten Realms scenario from the first to the second edition AD&D rules, much as the "Fate of Istus" adventure did with the Greyhawk campaign setting. To accomplish this objective, the writing of the modules and novels was being done simultaneously, supposedly to allow their publication at the same time the core rules transitioned to the second edition. The final format of the three-part adventure would be more plot-driven than those of the previously traditional dungeon crawling modules but this would end up becoming more common in published material from here onwards.