Chest (Floor)

This article is about the floor. For the object, see Chests. For other uses, see Chest (Disambiguation).

The Chest is one of five final levels in The Binding of Isaac, alongside the Dark Room, The Void, the Corpse, and Home.

The Chest can be accessed with three methods: Touching the chest dropped by Isaac while having The Polaroid (always dropped by Mom after beating Isaac five times) equipped, or, while in the Cathedral, by using Telepills or another item that acts like Telepills, and being sent to the I AM ERROR room, or finding a Black Market on the Cathedral and going into the beam of light.

Like the Cathedral before it, the Chest consists of only one floor. In the Chest, it is not possible to bomb doors open to skip rooms. The Chest's rooms are usually devoid of Rocks and other obstacles and are mainly filled with bosses and mini-bosses. The boss of the floor is always ???.

The first room in the Chest will automatically contain 4 golden chests. These special chests always contain treasure room items. Rarely, these chests can also be Mega Chests or Eternal Chests. Additionally, all brown and golden chests spawned in the Chest will always contain Treasure Room Items. This means that a lot of different items can be found in the Chest when clearing rooms with items or effects that raise the chance of spawning chests. This can be useful when trying to complete the collection page. Destroying Slot Machines, Fortune Telling Machines, and all types of Beggars with the exception of the Shell Game will also spawn items.

After completing the Chest or the Dark Room for the first time, the first room of the Chest will always contain a large golden door, which can be unlocked with either the Key Pieces (combination of Key Piece 1 and Key Piece 2), Dad's Key, Get out of Jail Free Card, or Mr. ME!, allowing access to Mega Satan.

Monsters[ | ]

Entity	ID	Description
Imp	259.0	Slowly drifts towards Isaac, frequently firing 5 blood shots in quick succession towards him. Tries to avoid Isaac's shots and occasionally teleports and reappears elsewhere.
Bony	227.0	Wanders around the room and throws a bone at Isaac when he is in sight.
Death's Head	212.0	Invulnerable enemy that moves diagonally around the room, dealing contact damage. Dies when the room is cleared.
MemBrain	57.0	Slowly moves around the room, occasionally hopping and firing 8 large blood shots in all directions. Splits into 2 Brains upon death.
Dip	217.0	Slowly dashes in random directions, dealing contact damage.
Dinga	223.0	Slowly moves around the room, occasionally hopping to spawn Dips or fire 8 Brown shots in all directions. Splits 2 Squirts upon death.
Pale Fatty	208.1	Slowly walks towards Isaac. Occasionally farts and shoots 6 blood shots in all directions. Has a chance to turn into a Blubber upon death.
Attack Fly	18.0	Red fly that follows Isaac and deals contact damage.
Frowning Gaper	10.0	Walks towards Isaac, dealing contact damage. They start out with their eyes closed, but when they gain line of sight with Isaac, their eyes open and they permanently move faster. Usually turns into a Pacer or with a small chance a Gusher upon death.
Nulls	252.0	Walks towards Isaac, dealing contact damage. Upon getting near Isaac, it will open its eyes, though its speed doesn't change. Fades into and out of visibility.
Gurgling	237.0	Charges towards Isaac when he lines up with them, leaving a trail of Red Creep and shooting 6 blood shots.
Bone Knight	283.0	Moves erratically around the room, charges toward Isaac when in line of sight, and leaves behind a short-lasting trail of damaging Red Creep. Can only be damaged from behind.
Red Maw	26.1	Floats quickly towards Isaac and releases 4 blood shots in the cardinal directions upon death.
Mom's Hand	213.0	Falls from the ceiling. If it lands on Isaac, it deals damage and teleports him back to the spawn room of the floor. Entering a room containing Mom's Hand will warn Isaac with Mom's laugh.
Rotty	226.1	Slowly walks towards Isaac, leaving short-lasting Red Creep behind itself. Spawns a Bony or two Attack Flies upon death.
Spider	85.0	Erratically moves around the room. If Isaac gets close to it, it chases him, trying to deal contact damage.
Oob	224.0	When Isaac lines up with it horizontally, it charges across the room once. When Isaac is not horizontal to it, it spawns Brains.
Wizoob	219.0	Disappears, then appears near Isaac and spits a cluster of spectral tears at him.
Lil' Haunt	260.0	Floats toward Isaac and occasionally fires a blood shot at him, predicting his movements.
Slide	44.1	Quickly slides towards Isaac when he gets in its line of sight, then moves slowly back to its original position. Cannot be destroyed.
Dark Ball	404.1	Floats towards Isaac, doing contact damage.
Blue Conjoined Fatty	257.1	Slowly walks towards Isaac and occasionally farts out a homing Ipecac shot at Isaac.
Cyclopia	284.0	Walks towards Isaac, dealing contact damage and leaving behind a short-lasting trail of damaging Red Creep. Occasionally shoots a blood shot towards Isaac.
Rag Man's Ragling	246.1	Quickly leaps towards Isaac and deals contact damage. Randomly shoots two purple shots that orbit around it.
Ministro	305.0	Hops around randomly and hop towards Isaac when he gets close, occasionally spitting out a cluster of disorganized shots.
Wrinkly Baby	38.3	Dashes towards Isaac at high speed and fires three blood shots in his direction once stopped.
Grilled Clotty	15.3	Quickly and randomly wanders around the room, firing four flame shots in the cardinal directions at a slight angle.
Holy Mulligan	22.2	Wanders around the room, avoiding Isaac and spawning Angelic Baby (small) if he gets close. Spawns 1-2 Embryos upon death.
Needle	881.0	Pops out of the ground and lunges towards Isaac, dealing contact damage.

Degraded Bosses:

Name	ID	Notes
The Adversary	268.0
Baby Plum	908.0
Big Horn	411.0
Blastocyst	74.0	Medium- and large-form only
Blighted Ovum	79.2
The Bloat	68.1
Brownie	402.0
The Cage	265.0
Carrion Queen	28.2
C.H.A.D.	28.1
Chub	28.0
Conquest	65.1
Daddy Long Legs	101.0
Dangle	261.1
Dark One	267.0
Death	66.0
Dingle	261.0
The Duke of Flies	67.0
Envy	51.0
The Fallen	81.0
Famine	63.0
Fistula	71.0	Medium- and large-form only
The Forsaken	403.0
The Gate	263.0
Gemini	79.0
Gluttony	49.0
Greed	50.0
Gurdy	36.0
Gurdy Jr.	99.0
Gurglings	237.1
The Haunt	260.0
Headless Horseman	82.0
The Hollow	19.1
The Husk	67.1
Larry Jr.	19.0
Little Horn	404.0
Loki	69.0
Lokii	69.1
Lust	47.0
The Matriarch	413.0
Mega Fatty	264.0
Mega Maw	262.0
Monstro	20.0
Monstro II	43.0
Peep	68.0
Pestilence	64.0
The Pile	269.1
Pin	62.0
Polycephalus	269.0
Pride	52.0
Rag Man	405.0
Rag Mega	409.0
Reap Creep	900.0
Sisters Vis	410.0
Sloth	46.0
The Stain	401.0
Super Envy	51.1
Super Gluttony	49.1
Super Greed	50.1
Super Lust	47.1
Super Pride	52.1
Super Sloth	46.1
Super Wrath	48.1
Teratoma	71.1
Turdlings	237.2
War	65.0
Widow	100.0
Wrath	48.0
The Wretched	100.1

Bosses[ | ]


???	Mega Satan

Notes[ | ]

If Isaac gets Key Piece 1 and Key Piece 2, the key will open the golden gate to fight Mega Satan, but if Isaac uses Forget Me Now, the floor will reset and Isaac won't get both Key Pieces back, making it so that the golden gate won't open again.
It is possible to create trapdoors thanks to Reward Plate (found for example in a Secret Room). Upon entering them, the floor is restarted. If the large golden door was opened before restarting, it will be closed afterward.
- This may result in a softlock on a Daily Run to Mega Satan, if no other way of opening the door is found.
The I AM ERROR room cannot be reached by any method in the Chest and the Dark Room.
- The I AM ERROR room can be reached by leaving a Crawl Space through an unintended direction. The room will always contain a portal leading to The Void.
If a Red Chest is placed in the starting room, it will contain a Devil Deal, similar to the Dark Room.

Unlockable Achievements[ | ]

Angels - Complete Chapter 6.

Dead Boy - Complete Chapter 6 without taking damage.

Something wicked this way comes! - Defeat ??? as 3 different Characters.

Something wicked this way comes+! - Defeat ??? as 6 different Characters.

Trivia[ | ]

The Chest and its boss, ???, are based on the in-game backstory of Isaac locking himself in his toy chest and asphyxiating to death.
The sprite appearance of ??? is a reference to Edmund McMillen's Dead Baby games, which are often referenced throughout The Binding Of Isaac.
The texture of the floor may have a small chance of showing two small glowing dots that look like eyes.
The shadow cast on the floor most likely resembles Isaac's head while opening the chest.
In The Void, during Delirium's death animation, its boss room switches between different environments, and it always ends with a Chest backdrop.