If you’re fond of the unusual, than you’re going to love the cheerfully violent Happy Wheels, because this is the strangest game I’ve ever played. It’s a browser-based pseudo-platformer with a very active community of players who use its level editor to craft custom levels. Some are better than others.
It’s not necessarily a horror game, but I remedied that little issue by playing — mostly dying, actually — on maps inspired by games like Dead Space and Limbo. Won’t you join David and I for some good wacky fun?