I was also going to suggest The White Chamber, but I was beaten to it.

Takeshi no Chosenjo is something I still need to attempt to play at some stage. Mostly because it’s a game that was deliberately created to be really really bad.

The original Clock Tower for the SNES was an interesting diversion for me.

Elvira creeped me out when I was younger. Some of the death scenes in that game were pretty graphic for a 1990-era game. It’s just a pity that it’s so difficult to track that game down. Log in to see images!