So I play through the game 3 times, which wasn't bad at all. Seeing the different guardians, and stuff was cool, so I did it. But for the ending I was expecting Mantorok maybe to be revived and come and destroy everything. Heh. Though the ending did set up a sequel, maybe.
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Don't get me wrong though, Eternal Darkness is what I think is one of the greatest games I've ever played.