Things that would have made Amnesia scarier

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Yeah and while we're at it, why not randomize the story, too. Just have tons of story snippets and play them in random order, Dear Esther - style. And make it so that every time you play, your character has a different name and backstory. All other characters in the story are randomly generated, too, of course, including a random face, name and body generator.

Same goes for the monsters, they are generated with random body parts like they did it in Spore. And make the order of levels random, too. And the levels themselves, have them be generated randomly like Diablo did it. Level Exit is opened by a random item, found at a random place somewhere in the level.
It's gonna be awesome. We'll call it Randomesia - the Generic Descent.