??? (Floor)

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Font TeamMeat qmark.pngFont TeamMeat qmark.pngFont TeamMeat qmark.png

Stage's starting room
(chapter 4.5)
Table dividing line 1.png
 
Normal and hard modes only 13
 
Normal and hard modes only 9
Added in  Afterbirth

???, referred to as Blue Womb or Dead Womb in the OST, is a new chapter added in Afterbirth. It is unlocked by defeating Mom's Heart for the 10th time.

It is accessed by defeating Mom's Heart or It Lives! within 30 minutes. Leaving and re-entering the Boss Room after the timer has reached 30 minutes will make the entrance to the Blue Womb disappear.
If the player is fast enough, both Boss Rush and Blue Womb can be completed in a single run.

It contains the following:

  • 4 golden chests in the main room.
    • Unlike the ones in The Chest The Chest, these are just regular golden chests and don't guarantee an item drop.
  • 2 locked treasure rooms, both of them offering two choices of items as if More Options More OptionsMore Options Icon.pngTwo items spawn in every Treasure Room. Only one can be taken; the other will disappear. was active.
  • A shop that always contains 6 items, even if Shop Upgrade Lvl. 4 has not been unlocked.
  • A 2x2 boss room that contains Hush.
    • The door leading to the boss room might blend in with the northern wall, but will slide away upon approaching it.

It is advised to enter the Blue Womb only with very powerful items and/or a set of good dodging skills, because Hush ranks amongst the most difficult bosses of the entire game.

After Hush is defeated, one of two things will happen:

  • If this is the first time Hush has been defeated, a giant golden chest will appear in the middle of the room. Jumping into it ends the run and gives ending 17.
  • If Hush has been defeated before, a trapdoor and a beam of light leading to Sheol Sheol or Cathedral Cathedral will appear.
    • If Hush has been defeated before but Sheol and The Cathedral have not been unlocked, the giant golden chest will appear instead.
    • Added in Afterbirth † Additionally, an exit will spawn in the corner of the room, containing a Portal leading to The Void The Void.

Bosses

Boss Hush.png
Hush

Notes

Trivia

  • The displayed name of the chapter is ???, but the chapter is referred to as Blue Womb by the achievement, using the same logic as the character ???.
  • The character ??? and the Blue Womb have the same unlock requirements.
  • Blue Womb is unique as the only chapter that can be optionally done between mandatory chapters.
  • Blue Womb is the smallest chapter, only containing 5 normally accessible rooms.
  • In Isaac's last will, the Blue Womb is referred to as "some barren place".

Music

The Blue Womb's music is called Mater Prope or Nativitate. These names are in Latin, and translate to "Birth" and "Almost Mother" respectively.

The tracks that play during the battle against Hush are called Ascension (the ??? boss fight music; played during Hush's first phase, which is similar to Blue Baby) and Morituros (during the second phase).

Binding of Isaac: Afterbirth OST

Bugs

Bug Bug! Attempting to open the door leading to Hush's room while holding a golden key will cause Isaac to walk through the door without opening it, immediately beginning the Hush fight.


Mom's Heart  Unlocks Mom's Heart Unlocks Mom's Heart  Unlocks
Added in Afterbirth †
A NooseA NooseDefeat Mom's Heart 3 timesA QuarterA QuarterDefeat Mom's Heart 8 timesA Fetus in a JarA Fetus in a JarDefeat Mom's Heart 9 times??????Defeat Mom's Heart 10 timesEverything Is Terrible!!!Everything Is Terrible!!!Defeat Mom's Heart 5 timesIt Lives!It Lives!Defeat Mom's Heart 11 timesWire Coat HangerWire Coat HangerDefeat Mom's Heart 4 timesIpecacIpecacDefeat Mom's Heart 6 timesExperimental TreatmentExperimental TreatmentDefeat Mom's Heart 7 timesRubber CementRubber CementDefeat Mom's Heart 2 timesDarkness FallsDarkness FallsDefeat Mom's Heart 11 timesSolar SystemSolar SystemDefeat Mom's Heart 3 timesSuicide KingSuicide KingDefeat Mom's Heart 11 timesDemo ManDemo ManDefeat Mom's Heart 9 timesLost BabyLost BabyDefeat Mom's Heart on hard mode as IsaacCute BabyCute BabyDefeat Mom's Heart on hard mode as MagdaleneCrow BabyCrow BabyDefeat Mom's Heart on hard mode as EveShadow BabyShadow BabyDefeat Mom's Heart on hard mode as JudasGlass BabyGlass BabyDefeat Mom's Heart on hard mode as CainWrapped BabyWrapped BabyRemoved in Afterbirth † Defeat Mom's Heart on hard mode as Azazel
Added in Afterbirth † Defeat Mom's Heart on hard mode as Lazarus
Begotten BabyBegotten BabyRemoved in Afterbirth † Defeat Mom's Heart on hard mode as Lazarus
Added in Afterbirth † Defeat Mom's Heart on hard mode as Azazel
Dead BabyDead BabyDefeat Mom's Heart on hard mode as ???-0- Baby-0- BabyDefeat Mom's Heart on hard mode as The LostGlitch BabyGlitch BabyDefeat Mom's Heart on hard mode as EdenFighting BabyFighting BabyDefeat Mom's Heart on hard mode as Samson
Goat Head BabyGoat Head BabyDefeat Mom's Heart on hard mode as LilithBlue WombBlue WombDefeat Mom's Heart 10 timesSuper Greed BabySuper Greed BabyDefeat Mom's Heart on hard mode as KeeperBlue BomberBlue BomberDestroy 10 tinted rocks and defeat Mom's Heart 11 times Pokey MansPokey MansDefeat Mom's Heart 11 timesSmelterSmelterDefeat Mom's Heart or It Lives! on hard mode as ApollyonBurning BasementBurning BasementDefeat Mom's Heart 11 timesMarrowMarrowDefeat Mom's Heart or It Lives! on hard mode as The Forgotten
SmallIsaac.pngChaptersSmallIsaac.png
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Optional Chapter 5 Chapter 6 Endgame
Normal mode only
Hard mode only
Stage The Basement icon.png Stage The Caves icon.png Stage The Depths icon.png Stage The Womb icon.png Stage Sheol icon.png
Sheol


Stage Cathedral icon.png
Cathedral
Stage Dark Room icon.png
Dark Room


Stage The Chest icon.png
The Chest
The Basement The Caves The Depths The Womb
Added in Afterbirth †
Stage The Cellar icon.png Stage The Catacombs icon.png Stage Necropolis icon.png Stage Utero icon.png ??? Stage The Void icon.png
The Cellar The Catacombs Necropolis Utero ??? The Void
Stage Burning Basement icon.png Stage Flooded Caves icon.png Stage Dank Depths icon.png Stage Scarred Womb icon.png
Burning Basement Flooded Caves Dank Depths Scarred Womb
Greed mode only
Added in Afterbirth † Greedier mode only
Stage The Basement icon.png Stage The Caves icon.png Stage The Depths icon.png Stage The Womb icon.png Stage Sheol icon.png The Shop Ultra Greed
The Basement The Caves The Depths The Womb Sheol The Shop Ultra Greed
The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth The Binding of Isaac: Rebirth
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Characters Characters MainPageBabies.png Co-op Items Items Item Pools Item Pools Monsters Monsters Objects Objects
Pickups Pickups Pills Pills Rooms Rooms Seeds Seeds Transformations Transformations Trinkets Trinkets