The earliest news about
Shivering Isles surfaced on January 4, 2007, when an issue of
PC Zone revealed the expansion. The issue revealed details about the plot and setting of the expansion, published its first screenshots and announced its expected arrival in the second quarter of 2007. Bethesda did not announce the expansion until January 18, 2007. The announcement came after the expansion had already been featured in both
PC Zone and
PC Gamer, after it had been scheduled for a February 6, 2007 appearance in
Games for Windows, and after it had been reported in several online publications. The official announcement also confirmed an eventual release for the
Xbox 360, something the magazines, being PC publications, had not previously mentioned. Further clarification came in early March when Executive Producer
Todd Howard revealed the specific release date of March 27, 2007, A disc version of
Shivering Isles was announced on September 6, 2007, with a previously disallowed hard drive requirement. The expansion was released as a standalone for the
PlayStation 3 version of the game on November 20, 2007, and as a download from the
PlayStation Network on November 29, 2007. The expansion was made available for download to Australian customers only on November 23, 2007.
Shivering Isles and
Knights of the Nine expansions shipped together in the packaged release of Oblivion's Game of the Year edition.
Concept art Much of the distinctive look of
Shivering Isles is credited to concept artist
Adam Adamowicz. The landscape of the Isles is divided into two main areas:
Mania and
Dementia. The land of Mania is characterized by vivid colour and fantastical flora, while Dementia is filled with bogs and agonistically twisted trees and roots. Adamowicz had a major influence on the style of other
Bethesda Softworks game titles such as
Fallout 3 and
The Elder Scrolls V: Skyrim. The portal to the Shivering Isles was also designed by Adamowicz, and bears his signature style. ==Reception and legacy==