Shivering:Xbox 360 Achievements
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Shivering Isles adds 250 Gamer Points (from 10 achievements) that can be collected by Xbox 360 players when they complete certain objectives. These are in addition to the 1000 Gamer Points available in the core game of Oblivion. None of the other official mods have added any achievements or gamer points.
A single character can only receive one of the two achievements "Duke/Duchess of the Mania" and "Duke /Duchess of Dementia." If you want to unlock both achievements without playing through Shivering Isles again you can simply save before doing one, then reload to unlock the other.
[edit] Shivering Isles Achievements
Total: 250 Gamer Points

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