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For the character, see ???.

??? is the end boss of The Chest and added in V1.30 for the Wrath of the Lamb expansion. Along with Satan, ??? is the game's final boss.

His encounter is very similar to Isaac, except he is more powerful in that he fires more tears in retaliation.

Behavior

Phase 1

Xxx form1.png

??? will appear lying down in the center of the room, crying on the floor. He shoots 12 high-velocity tears in a radial burst, some of them being purple and slightly homing, and will retaliate with streams of tears when hit, some of which may also be homing. He will also spawn Flies continuously.

Phase 2

Xxx form2.png

At 66% of his health, a light will shine on ???, and he jumps from the ground. He will then periodically shoot 4 large purple homing tears in all directions. He will still retaliate with tears when hit and will continue to spawn Flies.

Phase 3

XXX form3.png

Triggered near 33% of ???'s health. ??? will grow angel wings, smile, and start floating. White beams will be randomly shot down from the sky (similar to Crack The Sky and White Pony), Angel Babies will start spawning frequently (up to a maximum of 6), and the same homing projectiles from before will be shot in six directions at the same time. At this point ??? will no longer retaliate with tears when hit, and will spawn Flies less frequently.

Champion Variant

Eternal ??? acts almost the same as its normal counterpart, but he teleports more randomly and frequently than Eternal Isaac. He also slowly regenerates HP during Phase 1 like Isaac.

This variant was added in Eternal Edition and exclusively encountered in Hard Mode.

Notes

  • Using The Bible during or after the fight will instantly kill the player (similar to Isaac and Satan) unless they have The Wafer item.
  • Like in the Isaac fight, using items with a high fire rate (such as Technology 2) is dangerous in this fight, as ??? will retaliate with a large amount of tears upon each hit. This also applies to effects which apply damage rapidly, such as Mom's Knife.
  • Applying slow effects such as Little Gish or Spider Bite to ??? will not affect the speed of his homing tears, but will slow all normal tears.
  • Activating Mom's Bra or triggering the special effect of Mom's Contacts will prevent ??? from spawning enemies or attacking at all—including when damaged—for the duration of the effect.
  • ??? cannot be damaged by the Crack The Sky light beams, or by his own. However, any Angelic Babies in the fight can take a small amount of damage from the light beams.

Related Achievements

Isaacs Head.jpg Isaac's Head - Defeat ??? as Isaac.
Maggys Faith.jpg Maggy's Faith - Defeat ??? as Magdalene.
Cains Eye.jpg Cain's Eye - Defeat ??? as Cain.
Judas Tongue.jpg Judas' Tongue - Defeat ??? as Jude.
Eves Bird Foot.jpg Eve's Bird Foot - Defeat ??? as Eve.
BBs Soul.jpg ???'s Soul - Defeat ??? as ???.
Samsons Lock.jpg Samson's Lock - Defeat ??? as Samson.

Trivia

  • This boss is a reference to Ending 10, where Isaac finds ??? in the giant chest.
  •  ??? Is also a reference to BlueBaby, Edmund's Newgrounds name.
  • The music for this fight is the same as the Isaac fight, My Innermost Apocalypse.
  • In the second phase, ???'s tears are incorrectly shaped on his sprite, while in the third phase, his tears are falling down correctly.

Bugs

  • Whenever he is curling up while in his third form, he might turn into Isaac for a single frame.
  • If you die after you beat him but have revive, entering the boss room will have both the boss and the chest present, but you can get to the chest to activate the ending.

Gallery

In-Game Footage

Bosses
Chapter 1
Dukeofflies full.png
The Duke of Flies
Gemini full.png
Gemini
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Monstro
Larryjr full.png
Larry Jr.
287x265-Steven Fullsize.png
Steven
220x287-Isaac Vs famine edited- noobletk.png
Famine
260x200-400px-Widow3.png
WidowDLC.png
Pin clean.png
PinDLC.png
Chapter 2
Fistula.png
Fistula
Gurdy full.png
Gurdy
Peep Full.png
Peep
Chub.png
Chub
Chad full.png
C.H.A.D.
BC Pestilence.png
Pestilence
The Husk.png
The HuskDLC.png
260x220-The Hollow2.png
The HollowDLC.png
Chapter 3
285x230-MonstroII full.png
Monstro II
Loki full.png
Loki
250x250-400px-Mom.png
Mom
Gish full.png
Gish
BC War.png
War
Mask of Infamy.png
Mask of InfamyDLC.png
Chapter 4
Scolex full.png
Scolex
Blastocyst full.png
Blastocyst
Moms Heart Full.png
Mom's Heart
250x250-ITLIVEScutout.png
It Lives
VSDeath.png
Death
250x200-Teratoma..png
TeratomaDLC.png
Lokii cutout.png
LokiiDLC.png
BC Conquest.png
ConquestDLC.png
Chapter 5
Satan Full.png
Satan


Bc isaac.png
IsaacDLC.png
Chapter 6
BC xxx.png
???DLC.png
Any Chapters
TheFallen Full.png
The Fallen*
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Headless Horseman*
Gurdjr.png
Gurdy Jr.*DLC.png
Blighted ovum.png
Blighted Ovum*DLC.png
Carrionqueen.png
The Carrion Queen*DLC.png
The Wretched.png
The Wretched*DLC.png
VS DaddyLonglegs.png
Daddy Long Legs*DLC.png
Bc Bloat.png
The Bloat*DLC.png
200x300-400px-Triachnid boss portrait.png
Triachnid*DLC.png
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