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The new expansion pack has been estimated to have an additional 30–40 hours of gameplay available to players, and the Realm of Madness is said to be 25% of the size of Cyrodiil. Besides if you've played Oblivion for 200 hours, you've gotta be sick of gray stone castles." Lead designer Mark Nelson stated that the reason for the drastic change in theme was because " People want to explore a new realm.
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The Realm of Madness is considerably different in both look and feel than anything in the land of Cyrodiil. The Isles are threatened by an event called the "Greymarch" which happens at the end of each era and a champion must save them from possible destruction at the behest of Sheogorath. The final third is divided into half of both, and is known as the Palace District. Another third (Crucible) looks like and represents Dementia.
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One third of the city (Bliss) looks like and represents Mania. Near the eastern shore of the Shivering Isles lies the capital and only city of New Sheoth. The realm is divided into two sections: Mania, which is bright, colorful and over-saturated, and Dementia, which is dark, depressing and claustrophobic. The release for PlayStation 3 came in November of that year. The game officially released for Microsoft Windows platforms on May 26 and 27 of that year, costing 2600 Microsoft Points. 3.2 Sheogorath, Jyggalag, and the Greymarchīethesda Softworks officially announced The Shivering Isles was a planned expansion for The Elder Scrolls IV: Oblivion on January 28, 2007.
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