Nightmare Fuel / Nioh 2

Where's Guts when you need him?!

The first game was replete with horrific Yokai trying to kill you, and the sequel follows in its footsteps with more hideous freaks out of Japanese Mythology.

• See the page picture? That...thing? That's Mezuki. He's the first boss. The first mandatory boss of the game is a zombified equine horror that swings around a huge serrated cleaver like a throw pillow, spits the wailing spirits of the damned at you to attack, and demonstrates one of the nastiest abilities the bosses of this game has to offer: Dark Realm, the ability to flood the entire arena with miasma, severely limiting your stamina regeneration while giving him an all-but-infinite supply of Super Armor while it's active. Not to mention, when it does this, its right arm expands to a hideous, misshapen size, with Amrita glowing through tears in its skin.
  • Oh yes, and its boss theme? Calling it 'menacing' is a severe understatement.
• Turns out there is one more Yokai like Mezuki, and that's the quite similar Gozuki.
• Quite possibly the most horrifying Yokai in the entire series is the newcomer Mitsume Yaruza. Where to even begin with this thing: eight twitching heads scattered at odd intervals over its form, three glowing eyes leaving five of said heads Eyeless Faces, a body mutated into a lump of gangrenous flesh scuttling around on four arms twisted around into spider-like legs...it's like the Guardian from The Evil Within 2! To make matters worse, they're minibosses, making them incredibly hard to defeat on top of looking utterly terrifying.
• Waira, snake-like Yokai with unnaturally human faces and wicked scythes for arms.
• Even Gaki, The Goomba of the game, are the stuff of nightmares: squat, emaciated little goblins with skeletal faces and bulging red eyes. They used to be humans that sinned in life and were punished with eternal starvation, and now they roam the land not particularly caring what they snack on in their desperation to ease their hunger. The player is on the menu, obviously, but they're not adverse to diving on Gaki you've just killed and chowing down: let them have a taste of flesh, and they morph into larger, and appropriately stronger, versions of themselves.
• Nuppeppo, a new Yokai added in the first DLC pack. These things look like walking tumors, with lumps of flesh instead of eyes and a nose. They also have a circular Belly Mouth lined with teeth like a lamprey's, which they can use as a Vacuum Mouth to suck the player in and chew them to death. To add insult to injury, they're a surprisingly fearsome Lightning Bruiser enemy-type with hard-to-read attacks that gives players more reasons to fear them than just their disturbing appearance.
• The "Darkness In The Capital" DLC's portrayal of Yokai is pretty frightening compared to what we usually see. In this series, most powerful Yokai are humans twisted by Amrita, but in the second DLC many of them seem to be actual, literal demons crawling up from hell. They don't even die normally, instead being pulled out of reality once they're defeated. That's not even getting into the Lightning Gods of Yome who are easily one of more disturbing backstories we get.