Sheogorath, the Daedric Prince of Madness, seeks a mortal champion to save his realm from annihilation at the hands of the mysterious Jyggalag and the Greymarch. Face new challenges and dangers, and fight with exciting new weapons, spells and armor, in a world split between Mania and Dementia in the official expansion to Elder Scrolls IV: Oblivion?the 2006 Game of the Year?and survive to claim the greatest prize of all in The Elder Scrolls IV: Shivering Isles!