Board Thread:General Discussion/@comment-131.164.214.210-20130429074220/@comment-8126685-20130430005722

No, you wouldnt have to start over as your games is saved; I would sell your copy for the GOTY edition, although I must warn you-on Ps3 version vapirism can't be cured. But other than that you should be fine; Shivering Isles is the best add-on in my opinion, so enjoy my friend.