The World of Aden is a setting intended for the Masterbook and D6 systems, and uses background featured in two SSI video games, Thunderscape and Entomorph.
Shane Hensley received an official transfer of the intellectual property from the former president of SSI, and eventually sold it to Kyoudai Games, who publishes the current version of the tabletop RPG (as of February 2022).
Shannon Appelcline commented that "The World of Bloodshadows (1994), a noir fantasy, was West End's only original setting for MasterBook; everything else was licensed.
[2]: 261 Andy Butcher reviewed The World of Aden for Arcane magazine, rating it a 6 out of 10 overall.
[1] Butcher comments that "unfortunately, while the book succeeds at sketching out the basics of the world, it rarely finds the space to go into detail.