9. Corpse Party: Tortured Souls
This one is short and sweet; although, sweet might not be the best term.
You can probably infer from the gruesome title that this show is the kind of gore anime that will make you spew up your lunch if you're not careful. Still, if you like a cheeky slice of blood and guts, then this is one hell of an experience that you don't want to miss out on.
Based on the survival horror games created by Team GrisGris, this short series follows a group of young students who accidentally travel to the deadly Heavenly Host Hotel after attempting to perform a charm together. They're then brutally hunted down by the dead spirits of murdered students and must fight to survive.
Corpse Party: Tortured Souls is unrelenting in its violence. It has attained a reputation for being one of the most gruesome shows in anime, with tongues being cut out, people being smashed against walls and all kinds of disgusting treats.
It's only four episodes long, meaning you can finish it in one sitting. Thus, if you need something short to watch this Halloween, then you'd be right on the money with this video game adaptation.