I only played the first Amensia game. I felt it was kind of a weird fit. It was a horror game in that you were in a horror environment with entities that were scary. But the lack of consequence for death made it feel kind of gamey. Horror is hard to get right. The amnesia monsters are horrifying, yes, but in the context of a horror game, not especially memorable in my opinion. One thing I think the resident evil series has done well especially in number 7 and the number 2 remake, is realize that players won't be scared for the whole game. In the first half of these games, you tend to be weak and there are genuinely frightening moments. Towards the end you're pretty desensitized to the nature of that game's fucked up shit, and you just want to mow them down or get by the efficiently.

My absolute favorite horror moment is in the original Silent Hill. You enter this giant hospital and you know its going to be a huge daunting task if its full of monsters, but its not. So you go through the elevator to floor one. It's empty. Floor 2 is empty. The final floor, floor three... is empty. So returning the the elevator you're feeling like you missed something and then, ta-dah, the elevator eerily has acquired a bloody fourth floor button letting you know you're about get shat on.