The thing that really freaked me out, well, two of them... there's a scene in the bathroom where the female lover is taking a bath and the water turns to blood and she get sucked down the drain, and the picture at the top of the stairs... you click it, and these handprints strain to push out of the painting... no music or sound, but it's just creepy... Oh, and one of the attic rooms, there's this scene with a baby with a Stauf doll in the crib next to it, and the doll comes to life and strangles the baby, and it has this EVIL look on its face while it's doing so.
It's funny, because at the time, this game was the most amazing thing. Acting stylized, but at the same time effective, but you go back and look at it today, and you're just like, "Man, this has the crappiest acting *ever*."