Editing Gamma World (section)

===Sixth Edition (2003)===
In November 2002, [[Sword & Sorcery Studios]] (SSS) announced that it had licensed the ''Gamma World'' setting from WOTC in order to produce a sixth version of the game.<ref>{{Cite web |title=Ci siamo spostati! |url=http://www.gamingreport.com/article.php?sid=6207 |website=Gamingreport.com |access-date=7 November 2017 |archive-date=9 October 2007 |archive-url=https://web.archive.org/web/20071009065616/http://www.gamingreport.com/article.php?sid=6207 |url-status=dead }}</ref> SSS's version of the game, which reached the market in 2003, used the ''[[d20 Modern]]'' system, and mimicked ''D&D'''s "three core book" model with three hardcover manuals:

*''Gamma World Player's Handbook'' by [[Bruce Baugh]], Ian Eller, Mikko Rautalahti, and Geoff Skellams
*''Gamma World Game Master's Guide'' by Bruce Baugh, Werner Hager, Lizard, and Doug Oglesby
*''Gamma World Machines and Mutants'' by David Bolack, [[Gareth Hanrahan]], Patrick O'Duffy, and [[Chuck Wendig]]

Sword & Sorcery Studios also published three paperback supplements for the d20 version of ''Gamma World'':

*''Gamma World Beyond the Horizon'' by Ellen Kiley
*''Gamma World Cryptic Alliances and Unknown Enemies'' by [[Owen K.C. Stephens]], Alejandro Melchor, and Geoff Skellams
*''Gamma World Out of the Vaults'' by James Maliszewski, [[John Snead]], and Ellen P. Kiley

This new version of the game presented a more sober and serious approach to the concept of a post-nuclear world, at odds with the more light-hearted and adventurous approach taken by previous editions; it was also the first edition of the game to include fantastical [[nanotechnology]] on a large scale. In August 2005, White Wolf announced that it was reverting the rights to publish ''Gamma World'' products back to Wizards of the Coast, putting the game out of print again.<ref>{{Cite web |title=Sword & Sorcery Online |url=http://www.white-wolf.com/swordsorcery/index.php?articleid=276 |date=30 September 2007 |url-status=dead |archive-url=https://web.archive.org/web/20070930022249/http://www.white-wolf.com/swordsorcery/index.php?articleid=276 |archive-date=30 September 2007 |access-date=7 November 2017}}</ref> Several critics and fans considered Tweet's ''Omega World'' to be a superior d20 System treatment of the ''Gamma World'' concept.<ref>{{Cite web |title=Review of Gamma World Player's Handbook - RPGnet d20 RPG Game Index |url=http://www.rpg.net/reviews/archive/9/9821.phtml |website=Rpg.net |access-date=7 November 2017}}</ref>