I am fascinated by games with 2D art that still manage to give you a good scare. I guess what I find interesting is if a game can manage to translate the scares and audio design which we know from 3D environments and movies. I have never really played any though. I would love to hear some suggestions, especially with Halloween coming soon!
All three Yomawari games have a really great atmosphere. Most of the scares are done with the audio. I think the first two games are often on sale on Steam.