Corpse

Corpse is a new environment added in Antibirth.

Once all three knife pieces have been acquired, upon completing Mausoleum II, a red fleshy door will appear. On subsequent runs, this door will appear regardless of whether or not you have all three knife pieces. Stabbing the door with the knife or throwing Sharp Key at it will open it, leading to a more difficult variant of Mom's Heart. After defeating Mom's Heart, the trapdoor previously leading to the Womb will now lead to the Corpse.

Monsters

Monster	Description
Scab	Flies towards Isaac. Upon death, farts and sends out 6 blood shots in all directions.
Fissure	Jumps towards Isaac like a Trite. When it jumps, it fires a red shot towards Isaac. Occasionally, it stands still and spews a chaotic burst of red shots.
Lunatic	Moves around the room and charges at Isaac if he gets within its line of sight. Constantly lashes out with its whip.
Floating Host	Flies around the room diagonally and is normally invulnerable. Raises its head up occasionally, revealing a fleshy stem that can be damaged.
Adult Leech	Charges towards Isaac when he's in their line of sight, and burrows in the ground to either pop out the side of the wall or the ceiling.
Barfy	Wanders around the room, and slowly follows Isaac when he's in its line of sight. Occasionally spews clusters of green shots towards Isaac.
Cohort	Hops around, occasionally stopping to spew out a cluster of blood shots at Isaac. Upon death, spawns four Globins.
Coil	Creates beams of electricity to other enemies in the room. Touching the electricity damages Isaac. Cannot be killed.
Corpse Eater	Rapidly moves around the room erratically and charges at Isaac if he comes within its line of sight.
Carrion Rider	Rapidly moves around the room erratically and charges at Isaac if he comes within its line of sight. The Bony on its back shoots at Isaac.
Cyst	Attaches itself to a wall or obstacle and rolls around it while periodically firing blood shots at Isaac.
Evis	Spits outs its guts, which latch onto Isaac, dealing no damage but slowly drawing Isaac closer to it, impeding movement.
Gasbag	Continuously creates a gas cloud around them.
Mama Fly	Lays Pustules on the ground. Explodes into Small Maggots when killed.
Pustule	Grows until it bursts into Small Maggots, and leaves a small puddle of green creep.
Rotten Gaper	Chases down Isaac, and may explode into Small Maggots.
Sick Boom Fly	Flies around the room diagonally. Upon death, creates a large poison cloud.
Small Maggot	Slowly crawls around the room randomly.
Spikeball	Travels back and forth in a straight line across a room. Cannot be killed.
Stillborn	Slowly floats towards Isaac, occasionally firing blood shots. Cannot be killed and dies when the room is cleared.
Twitchy	Alternates between chasing Isaac and leaping at him.
Vessel	Walks around the room and explodes into Small Maggots upon death.
Unborn	Spins and floats around the room towards Isaac, and can teleport randomly.

Rebirth Monsters

• Lump
• Leech
• Maggot
• Charger
• Spitty
• Globin
• Brain
• MemBrain
• Camillo Jr

Bosses

Floor 1

The Scourge	Rotgut	Chimera

Floor 2

The Witness

Notes

• Unlocking the entrance to the Corpse takes away the knife.
  • Using Dad's Key allows Isaac to keep the knife.

Music

• The track that plays in the Corpse is titled Drowning.

Bugs

Bug! The I AM ERROR room of Corpse II leads Isaac to Sheol. However, the Satan fight will be empty, and no exit will be generated. If Isaac enters the I AM ERROR room there, the game will crash upon touching the trapdoor.

Trivia

• Corpse started out as a mockup for a fight against Ur-Gurdy by NotYourSagittarius. which she expanded upon later on with a set of enemies.
• Corpse is referred to on Isaac's Last Will as "Some Dead Place".
• As the name implies, Corpse takes place in the insides of Isaac's dead mother after he kills her heart.
• One of the shadows seen looming over the Corpse floor resembles what could be a giant spider with sharp-tipped legs.
• The Lumps that appear in the Corpse resemble their original appearance in the original version of the game.

Chapters
Chapter 1	Chapter 2	Chapter 3	Chapter 4
Downpour	Mines	Mausoleum	Corpse