Partnership with TSR
In 1986, the American game publishing company TSR began looking for a new campaign setting for the Advanced Dungeons & Dragons game, and assigned Jeff Grubb to find out more about the setting used by Greenwood in his articles for Dragon magazine. : 19 According to Greenwood, Grubb asked him "Do you just make this stuff up as you go, or do you really have a huge campaign world?"; he answered "yes" to both questions. TSR felt that the Forgotten Realms would be a more open-ended setting than the epic Dragonlance setting, and chose the Realms as a ready-made campaign for AD&D 2nd Edition.
Greenwood agreed to work on the project, and began to prepare his Forgotten Realms material for official publication. He sent TSR a few dozen cardboard boxes stuffed with pencil notes and maps, and sold all his rights to the Realms to TSR for a token fee—just $5,000 and a promise to publish Greenwood's novels. The following year, Greenwood and coauthor Jeff Grubb wrote and published the Forgotten Realms Campaign Set (1987).
The campaign setting was a major success, and Greenwood continued to be involved with the evolution of the Forgotten Realms over the next decades. He went on to write numerous Forgotten Realms novels. Many of these center around the wizard Elminster, whom Greenwood has frequently portrayed at conventions and gaming events.[citation needed]
When TSR was in dire financial difficulties in 1996–1997, Greenwood offered to write some material for them for free to help get them back on their feet. Nothing came of the offer, but after Wizards of the Coast purchased TSR in 1997 and stabilized its finances, CEO Peter Adkison personally called Greenwood at the library he was working at to encourage him to continue writing Realms material. Greenwood responded he was happy to continue writing for the Realms for as long as he could.
Greenwood feels his work on the Realms that he likes best are "those products that impart some of the richness and color of the Realms, such as the novel I wrote with Jeff Grubb, Cormyr; the Volo's Guides; Seven Sisters; The Code of the Harpers; City of Splendors; and stuff that lots of gamers have found useful, such as Drow of the Underdark and Ruins of Undermountain."
Greenwood has also been contributing editor and creative editor of Dragon magazine.