Please don't list this on a work's page as a trope. Examples can go on the work's YMMV tab.
Nightmare Fuel: The Binding of Isaac
Say hello to The Husk, one of the new bosses in Wrath of the Lamb!
We don't have high octane nightmare fuel [sic] on this one.
Simply saying "ALL OF IT" will suffice.
-A troper on the discussion page.
Indeed, for a game which basic premise is mother trying to kill her son, The Binding of Isaac is pretty unsettling.
However, a lot of the game's horror can count as Tear Jerker. Isaac is abused and destitute, always unloved, always hated, in a house with an overly religious- and also homicidally, sociopathically insane- mother who hears voices.
The designs for bosses in Wrath of the Lamb are horrifying. The new bosses seem to be the old ones... After you killed them. Most of them look absolutely horrible, Peep looks the worst by far. He seems to have collapsed on the inside and is bleeding from his eyesockets.Here is the poster.◊
The freakin' trailer. If the enemies looked creepy in 2D, imagine how horrifying they are in 3D! Or, don't imagine anything and just see it by yourself... If you dare.
The teaser for the remake is even worse - now everything is not only 3D, but creepy, rubbery puppets: Link Here. Their use of a photorealistic cat's head for Guppy's severed head is jarring and somehow adds a surreal edge to the horror.
A Trailer for the Sheol update has been released, and yes, it is exactlyashorrific as you'd expect it to be.
The secret boss of the Halloween update. What appears to be the Headless Horseman, represented as a jawless rotted head charging about the screen while its body acts like the second phase of Pestilence.
The True Final Boss of Sheol simply smiles before fighting you. It's unnerving.
What's worse is his nonsensical battle cries, which for the most part are distorted demonic speech that can't quite be understood... but other times, can be clearly discerned as Isaac's name. Why does the Devil know Isaac by name?
If that's true, then what about the times where he lacks a head?
Additional Paranoia Fuel - note the fact that when you fight Greed, he has a noose around his neck - One of these cadavourous shopkeepers got so mad or bored that he cut himself down and now wants to kill his customers. Now think that any single one of those shopkeepers could be him before you enter...
Take note of where you fight him. In secret rooms... and in shops.
Imagine your head being slowly transformed into a tumorous mass filled with flies, all while still conscious. You'll want to put those poor Mulligans and Hives out of their misery as quickly as possible.
And The Wrath of the Lamb? Has an upgrade that turns you into one.
Also from Wrath of the Lamb - The ones that have bombs painfully wedged into their skull and forced to charge at the player. Just imagine it for a second - Imagine you got possessed and used as a completely unwilling Action Bomb.
It is implied that a lot of the monsters are Isaac's lost siblings. How the hell did they end up so horribly disfigured and WHY are they there?
Well, considering the things that appear IN HIS MOTHER'S WOMB and in the general areas of the basement: maggots, mutated flies, what is most likely a nest of aggressive parasites, the devil, evil arcana, blood all over the place, Issac's mother, the karaken, a dedric prince, and randomly appearing flames it seems likely that Isaac was either the firstborn and other kids came after the problems, or Issac is just as tough as the person who defeated a knife wielding maniac with no weapons.
Considering the large amount of Devilish upgrades he gets, he might as well turn up to become The Antichrist.
The wiki even says "Makes Isaac's head look undead or soulless."
Most of the bugs of the game just fiddle with mook and boss behaviour, or lock you out of certain things. Some other bugs, however, are genuinely terrifying. One of the most persistent bugs happens after clearing a level, when, after the game apparently freezing, replaces the bad dream intermission scene with a version completely in black and white, a la Sin City. Guaranteed to make you defecate bricks the first time you see it. Even more disturbingly still, no one really knows if it is a bug, an intentional feature, or both.
Glitched Isaac. Before it was fixed, it could pop up after blowing up a blue rock. It's a copy of Isaac, riding a pony, inside of a Book of Shadows's shield. It floated around the room, and its body contorted and spun at lighting speeds while its head stared constantly at the camera. And besides that, it did absolutely nothing.
In many of the secret rooms that you either find randomly from an explosive enemy or through a power-up, you'll find a single, desiccating corpse with a fly or two. In front of the corpse is sometimes a pile of coins, sometimes another power-up, but all the corpse does is sit there, rotting. Did he die from being walled up in Mom's basement? Is he the remains of one of Isaac's attempts at escape? What's worse, sometimes the corpse has no face.
For those who don't want to follow the link, a teratoma is a tumor with teeth, eyes, arms, legs, and maybe even internal organs. Oh, and they're generally there from birth. And the Teratoma is in the Womb...