I recently acquired a copy of Gamma World adventure module GW1 Legion of Gold, by E. Gary Gygax with Luke Gygax and Paul Reiche III. This little gem was the first adventure released for Gamma World and one of only 3 for the first edition of the game. The Gygaxian spirit really shines through in this little beauty. I would even go so far as to call GW1 a lost treasure of an earlier age of gaming. The design parallels but in many ways improves upon the basic structure established in the class D&D Basic adventure B2 The Keep on the Borderlands. Uncle Gary and crew basically outline a mini-setting (not quite as small as the overland areas in B2) with a partially fleshed-out home base and four nifty mini-adventures. Like many modules of the era it could stand some expansion and alteration, but EGG clearly notes in the first edition Dungeon Masters Guide that all modules need to be tailored to your own specific game. Still, I can see 4 good solid sessions of adventuring fun coming out of this module.
For an added bonus about half of the interior illustrations are by Erol Otus!