Horror games as good as Amnesia?

[patchesthedrow]

The first playthrough of the We Don't Go the Ravenholm level of Half-Life 2 comes to mind. Doom 3 was legitimately scary for quite a length of the game. The darkness was more annoying than anything else for sure, the sound and environmental effects were killer.
I really feel that the game lost its potency the moment you started walking around with a rocket launcher. They were trying to go for a shoot 'em up and a horror game at the same time. If they just focused on one more than the other, I think the game would have been much better.
But seriously...the darkness really was annoying.