Nightmare Fuel / The Binding of Isaac: Antibirth

You've braved the Scarred Womb. You've conquered the Blue Womb. Welcome to Corpse, a rotten, dead womb.

It's a Binding of Issac mod, what would you expect?

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• The music that plays after killing Mom's Heart in the Mausoleum, "Spinning Intensifies". It sounds like Lavender Town, HILL Act 1, and the Reverse Song of Healing all rolled into one. It's almost as if the game is telling you "you've made a horrible, horrible mistake" — not completely unfounded, since you just killed your mother, and this is a grave reminder that she's dead.
• Once you hear this music, you have no choice but to get into the new floor, Corpse. It's the Womb chapter, but after the destruction of Mom's heart. As a result, the entire level is dead and rotting, and is teeming with enemies that are either rotting away (with visible skeletons) or feasting on the decaying meat. And let's not even get started on the music that plays, which feels like something out of a Creepypasta. Doubles as Nausea Fuel, even by this game's standards. It really puts the Scarred Womb to shame.
• The Final Boss of the Corpse, The Witness. It's implied to be an undead Mama Grudy that witnessed Isaac killing his mother.
  • In the versus screen, The Witness's boss portrait has it looming over Isaac, instead of the "facing Isaac from the side" view of every single other boss.
  • The Fridge Horror implication that The Witness represents the fact that Isaac, after killing his mom, was mentally scarred by not just having to kill his own mother to survive, but that she spent her last moment of life staring at him in silent judgement for it.
• If you thought the orignal music for Sheol and Dark Room was creepy, listen to Mudeth's Shadowdance and Morphine.
  • Thanks to the volume 3 update, we now have themes for Satan and the Lamb. Spectrum of Sin for the former and Fintnah for the latter.
• Ending 1x, the ending unlocked for beating The Witness. Issac's mother wakes up from the dead, causing Isaac to panic, and wakes up. When he wakes up, he's still in the basement.
• The new items naturally do not skimp on the Body Horror, but the absolute crowner is probably The Intruder. It's a little spider familiar that wedges itself into Isaac's face, with its legs poking out of his eye sockets. It also has a chance of making Isaac's head explode upon taking damage, spawning friendly spiders and freeing it to jump at enemies, which is actually less horrifying to look at.
  • An honorable mention for the most nightmarish item is "2Spooky". Silly name aside, the item causes Isaac to turn blood-red, and gives him a screaming face with hellish pupils. Hell, its effect is to make any enemies in a short range gain a fear effect, making it nightmare fuel In-Universe.
  • It Hurts, while not as horribly disfiguring as some of the other item options, tends to give players sympathy pains whenever it's picked up. All the item does initially is stitch Isaac's mouth shut, which is pretty tame by this game's standards. Here's the fun part: when Isaac takes damage, he cries even harder than usual and gets a Tears Up, because crying out in pain from taking damage tears open the stitches.
  • Mucormycosis (a decently useful item in its own right) really brings the Nausea Fuel with its visual effect, which gives Isaac a rampant, sickly purple fungal infection growing all over his eyes and under his eyelids. Oh, and as with a lot of other items, it's based on a real-life medical condition that really can get that bad, to the point that people have had their entire faces amputated because of it.
  • Damocles. All item pedestals are doubled, spawning an extra item for every item spawned. After you get hit, at any time without warning, the sword may fall, instantly killing Isaac regardless of his health. The more hits Isaac takes, the more likely it becomes for the sword to fall.
  • Akeldama. Its visual effect features Isaac with his torso split open and his guts hanging out. The item causes a trail of reddish brown tears to follow Isaac, as if he were dragging his intestines around. Yikes.
• The Whipper is an enemy that has a robe and a whip and, well, whips at you, and crossing the same horizontal or vertical axis from a distance will have it dash at you before attacking. While its attack pattern is manageable, what makes it verge into Nightmare Fuel territory is this creepy wide mouth that looks unnerving in appearance, and it's even more so when it opens its mouth while attacking. It isn't too dangerous, just as long as you keep your distance in the process of attacking it from the sides. By the way, it deflects bombs.
  • The Snapper is a variant of the Whipper that has a huge orange eye in the center. Unlike the Whipper, instead of a normal whip, it possesses a long, fleshy tendril that trades off attack width for longer range, and just like the Whipper, it dashes at you upon entering the same horizontal and vertical axis as you. Oh, and if you thought you were safe while hovering over rocks, the Snapper can attack through walls with its tendril.
    • The Scourge is implied to be a boss version of the Snapper, given that it has an eye that looks very identical to that of the Snapper's eye and that it also wields Combat Tentacles.
  • If the standard Whipper was not creepy enough, the Lunatic is way more terrifying, both in appearance and behavior. It looks horribly mutilated, as its lower jaw is torn off. If its appearance wasn't scary enough for you, then what it does will do the trick. It is far more aggressive and deadly than its standard counterpart and will constantly lash his whip while chasing after you at high speeds and savagely maul your player character.
• Thought Delirium's original theme was creepy? Well thanks to the volume 3 update, Mudeth has now made Terminal Lucidity with haunting breathing that is likely coming from Isaac as he slowly dies.
• Speaking of monsters, the Screamers are tall grey humanoid creatures that will slowly walk around. Once Isaac gets too close, the Screamer will well... Scream at him that will paralyze you. And that's before it gains an speed boast with an aura that slows you down if you are in it. Oh and not only are Screamers tanky, they're appearances aren't just limited to Mausoleum but also in Sheol and Cathedral. Fun! I wasn't planning on sleeping anyways..
• As you make your way through Corpse, you can see shadows that loom over you. At no point do you figure out what they are or why they're here.