I will probably be running a game in that genre, but when I do a search, all I get is recommendations for novels.
OK, so the system will probably be Daggerheart. The actual setting will be Ravenloft. Yes, I realize neither of these scream Arthurian. Yes, I realize that my lack of knowledge of the genre isn't helpful. Anyway. I'm planning on running in Nidala/Shadowlands (which is described as Arthurian) and connect some other domains with similar feelings to create a cluster.
So keeping that in mind, what would you recommend. Keep in mind, I can make anything into horror, so you don't need to limit yourself to Arthurian horror ideas. Anything will do.