 "Castle Greyhawk" is a large multipart scenario consisting of eleven dungeon levels below Greyhawk Castle, including "Where the Random Monsters Roam" and "The Temple of Really Bad Dead Things".WG7 "Castle Greyhawk" was edited by Mike Breault with Jon Pickens, with a cover by Keith Parkinson and interior illustrations by Jeff Easley and Jim Holloway, and was published by TSR in 1988 as a 128-page book.The designers of this twelve level dungeon were each given a single level to develop.