Shivering Isles features more than 30 hours of new gameplay and allows you to explore an entirely new plane of Oblivion – the realm of Sheogorath, the Daedric Prince of Madness. Shivering Isles adds to the existing world of Oblivion so you can continue playing with your existing saved game or character, or create an all new character just to explore the new content. New creatures, weapons, armor, ingredients, branching questlines, and more await in the land of Mania and Dementia.