Binding of Isaac: Rebirth Wiki

Each floor of the game is made up of a number of Rooms. The number of Rooms on each floor generally increases as the game progresses.

Normal Rooms[ | ]

Normal Rooms make up the majority of the Rooms on a floor. These Rooms typically contain enemies and may drop a pickup or chest after all enemies are killed. Many Rooms also contain various pickups, chests, items, and obstacles.

Isaac cannot leave a Room with enemies until they are all killed or until a door is opened with an explosion. If Isaac is currently holding an active item, completing a Room with enemies will add one charge.

Rooms can come in various sizes; while normal-sized Rooms are the most common, double and quadruple-sized Rooms can also appear.

(except in Rebirth) L-shaped triple-sized Rooms, narrow hallways, and tiny Rooms can also appear. Additionally, completing a quadruple-sized Room or an L-shaped Room will add two charges to Isaac's active item.

  • The last wave of Boss Rush adds only one charge.

Sometimes rooms can be "flooded" with water, blood, or lava, depending on the Chapter. Flooded rooms allow for unique interactions with some Items, such as (in Afterbirth † and Repentance)Collectible Jacob's Ladder iconJacob's Ladder, and enemies.

Normal rooms have occurrence weight assigned to them. Some rooms occur very rarely. Usually, those rooms contain numerous or rare pickups or chests — sometimes even items.

(except in Rebirth) Closets[ | ]

Closets are rare, small, dead end Normal Rooms. They will often contain a unique arrangement of items, objects, or pickups.

Special Rooms[ | ]

Boss RoomBoss Rooms[ | ]


Boss Rooms contain one of the many Bosses, with victory granting Isaac an item from the Boss pool, hearts (depending on difficulty), and a trap door leading to the next level. It always spawns in the room that's as far from the starting room as possible.

Mini-Boss RoomMini-Boss Room[ | ]

Mini-Boss Rooms are identical in appearance to normal Rooms and contain one of the Seven Deadly Sins.

  • Mini-Boss Rooms are iron barred shut upon entering and are unable to be escaped and opened, even by explosions, until the Mini-Boss is defeated.
  • Mini-Boss Rooms have a map icon but don't have a special door.
    • The map icon is only revealed once the room is entered, or if Isaac has an item that reveals map icons like Collectible The Compass iconThe Compass.

Treasure Rooms[ | ]

Normal/Golden Treasure RoomTreasure Rooms[ | ]


A Treasure Room, or Item Room, is guaranteed to appear on all floors from BasementBasement 1 to DepthsDepths 2. From Basement 2 and on, this Room requires a key to enter. The Room contains one item from the Treasure Room item pool. Various obstacles may be present, and occasionally (except in Rebirth) FlyFlies or (in Afterbirth †) Greed GaperGreed Gapers/(in Repentance) BulbBulbs will be present. This Room has a small chance to contain two items from the treasure pool that can both be collected, and a very small chance of containing no item pedestal at all, instead containing one poop pile, 3 Attack FlyAttack Flies, and various pickups, including one trinket.

(in Repentance) On DownpourDownpour / DrossDross, MinesMines / AshpitAshpit, and MausoleumMausoleum / GehennaGehenna, Treasure Rooms will always contain at least two items, with one of them being hidden, similar to Curse of the BlindCurse of the Blind.

(except in Rebirth) Golden Treasure Rooms always require one key to open in Greed Mode.

  • (in Afterbirth † and Repentance) Golden Treasure Rooms appear in Greedier mode as well, acting the same way and requiring a key to open.

(in Afterbirth † and Repentance) Golden Treasure Rooms can generate in the WombWomb/UteroUtero if the (in Afterbirth † and Repentance)Bloody CrownBloody Crown trinket is equipped when the floor is generated.

(in Repentance) Golden Treasure Rooms can generate in SheolSheol with the (in Repentance)Wicked CrownWicked Crown trinket equipped, and can generate in the CathedralCathedral with the (in Repentance)Holy CrownHoly Crown trinket equipped.

(except in Rebirth) Silver Treasure Rooms[ | ]

Silver Treasure Room opened

Silver Treasure Rooms are Rooms found in Greed Mode. They always contain one item from the Greed "Boss" Item Pool, and require no keys to open, being open from the start of the floor.

(in Afterbirth † and Repentance) Appears in Greedier Mode as well, acting exactly the same way.

(in Repentance) Devil Treasure RoomDevil Treasure Rooms[ | ]

Devil Treasure Room door locked
Devil Treasure Room door

When carrying the (in Repentance)Devil's CrownDevil's Crown trinket, any newly found or not walked into Treasure Room becomes a Red Treasure Room, which contain items from the Devil Room pool for the price of heart containers. The prices are the same as normally required in regular Devil Deals.

(in Repentance) PlanetariumPlanetariums[ | ]

Planetarium door locked
Planetarium door

Planetariums are similar to Treasure Rooms, but only contain one powerful celestial item belonging to the Planetarium (Item Pool), items exclusive to Planetarium Rooms. Planetariums have an additive and higher chance of spawning if the player avoids walking into Treasure Rooms.

ShopShops[ | ]

(in Repentance)Shop door locked
(in Repentance)Shop door

(except in Repentance)Locked Door

Shops require a key to open. They sell various items and pickups in exchange for coins. Shops start at level 0 and only sell 2 things, but Shops at higher levels sell more things. They can be upgraded through the Donation MachineDonation Machine, which can be commonly found in the Shops and sometimes in an Arcade.
Shops also have a chance of being replaced by a miniboss Room containing GreedGreed or Super GreedSuper Greed.

(in Afterbirth † and Repentance) Shops can generate in the WombWomb/UteroUtero if the (in Afterbirth † and Repentance)Silver DollarSilver Dollar trinket is equipped when the floor is generated.

(in Repentance) The Shop spawned on the first floor is free to enter.

(in Repentance) Shops can generate in SheolSheol with the (in Repentance)Wicked CrownWicked Crown trinket equipped, and can generate in the CathedralCathedral with the (in Repentance)Holy CrownHoly Crown trinket equipped.

(in Repentance) Has a new Door, no longer sharing a Door with Libraries.

ArcadeArcades[ | ]

Arcade Door

These Rooms are locked and require one coin to be opened. Arcades can only spawn on even floors (Basement II, Caves II, Depths II, Womb II, etc) if the previous floor was completed with 5 or more coins. Arcades can contain machines, beggars, and other objects.

(in Repentance) Arcades will spawn on the first floor of the alternate chapters (DownpourDownpour I, MinesMines I, MausoleumMausoleum I, CorpseCorpse I).

Challenge Rooms[ | ]

Normal Challenge RoomChallenge Room[ | ]

Challenge Room

Challenge Rooms will only generate if Isaac has full health upon entering the first floor of a Chapter. Challenge Rooms can only be entered if Isaac's total health (red, black, and soul hearts) is equal to or greater than his number of heart containers. Upon picking up its contents, Isaac has to fight three waves of enemies.

Boss Challenge RoomBoss Challenge Room[ | ]

Boss Challenge Room Door

Boss Challenge Rooms will only generate if Isaac has full health upon entering the second floor of a Chapter. They also can only be entered if Isaac has one or less red heart. Its contents are similar to the Normal Challenge Room, but upon picking up its contents, Isaac has to fight two waves of Bosses instead of normal monsters.

(in Repentance) Boss Challenge Rooms now can only be entered normally if Isaac's total health (red, black, and soul hearts) is equal to or less than 1 full heart, but now always contain an item from the Boss Item Pool.

Curse RoomCurse Rooms[ | ]

Curse Room Door

Curse Rooms are special rooms with spikes on the door that hurt Isaac when entering and exiting the Room. Curse Rooms can contain various things, ranging from enemies, red chests, to even pedestal items from the Curse Room Item Pool. However, Isaac doesn't take damage upon entering the room if he has flight (still takes damage upon exiting).

Sacrifice RoomSacrifice Rooms[ | ]

(in Repentance)Sacrifice Room door

Sacrifice Rooms are special rooms that have a chance to spawn a ChestChest or other preset rewards after Isaac damages himself on the spikes featured at the center of the Room. Sacrifice Rooms have a higher chance to spawn if Isaac has more health to sacrifice (if Isaac's total health (red, black, and soul hearts) is equal to or greater than his number of heart containers).

(except in Rebirth) Sacrifice Rooms now can pay with a much wider variety of rewards.

(in Repentance) Has a new bloody door, replacing its old, generic one.

Secret RoomSecret Rooms[ | ]

Secret Room Door

Secret Rooms must be bombed into, and are usually surrounded by 3 or 4 Rooms. Secret Rooms usually contain ShopkeeperShopkeepers and various pickups.

Super Secret RoomSuper Secret Rooms[ | ]

Secret Room Door

Super Secret Rooms must be bombed into, and are only located next to one other non-special Room. They tend to spawn closer to the Boss Room. Super Secret Rooms can contain a variety of pickups.

(in Repentance) Ultra Secret RoomUltra Secret Rooms[ | ]

Secret Room Door

Ultra Secret Rooms are very secret rooms, found when venturing one Red Room outside the normal map using the Collectible Red Key iconRed Key, Crystal KeyCrystal Key, Cracked KeyCracked Key, Soul of CainSoul of Cain, or by teleporting to it with XVIII - The Moon?XVIII - The Moon?. These map-expanding items allow you to create Red Rooms, and if correctly found, one of those new Red Rooms will have a Secret Room passageway to the Ultra Secret Room already opened. The Ultra Secret Room itself contains KeyKeys, key blocks, and/or ShopkeeperShopkeepers, and one item from the Ultra Secret Room item pool for its pedestal rewards.

LibrariesLibraries[ | ]

(in Repentance)Library door locked
(in Repentance)Library door

(except in Repentance)Locked Door

Libraries require a key to be entered and can contain book items, cards, runes, and trinkets.

(in Repentance) Has a new Door, no longer sharing a door with Shops.

Devil RoomDevil Rooms[ | ]

Devil Room

These Rooms allow the player to make deals with the Devil by trading health for items. Devil Rooms can also contain Red ChestRed Chests, Black HeartBlack Hearts, spikes, or monsters along with its signature devil statue. They may also have Fire PlaceFire Places or Red Fire PlaceRed Fire Places which have a chance to drop Coins, Red HeartRed Hearts, and more when extinguished.

Devil Rooms have a chance to contain Boss Krampus ingameKrampus rather than any items, if Krampus is unlocked.

Angel RoomAngel Rooms[ | ]

Angel Room

Angel Rooms contain an angel statue and one or more items to choose from, Soul HeartSoul Hearts, or Eternal HeartEternal Hearts. The Angel Room has a chance to replace the Devil Room if certain conditions are met. They may also have Blue Fire PlaceBlue Fire Places or Purple Fire PlacePurple Fire Places, which have a chance to drop Soul HeartSoul Hearts when extinguished.

(in Repentance) Can now have a ConfessionalConfessional in them.

VaultVaults[ | ]

(in Repentance)Vault door locked
(in Repentance)Vault door

(except in Repentance)Double Locked Room

Vaults require two keys to open and can contain various things, ranging from items to Donation MachineDonation Machines.

  • (in Repentance) Has a new Door, no longer sharing a Door with Dice Rooms.

Dice RoomDice Rooms[ | ]

(in Repentance)Dice Room door locked
(in Repentance)Dice Room door

(except in Repentance)Double Locked Room

Dice Rooms require two keys to open. Depending on the number of pips imprinted on the face of the large red die embedded in the floor, stepping onto the center of the die activates an effect.

  • Dice Rooms, when spawning, replace a sacrifice room that also could have spawned on the floor. They have a higher chance of spawning over a sacrifice room spawn if you have 2 or more keys.
  • (in Afterbirth † and Repentance) Dice Rooms now have a small image in the corner of the large red die that also tells the effect of stepping on it.
  • (in Repentance) Has a new Door, no longer sharing a Door with Vaults.

Clean BedroomClean Bedrooms and Dirty BedroomDirty Bedrooms[ | ]

Double Boarded Room

Bedrooms require two bombs to open. Bedrooms contain a bed that can be used once to restore all of the player's health, or if they have no red hearts, they give you 3 soul hearts (in Rebirth)and add one charge to their active item.

Depending on if the Bedroom is Clean or Dirty (the main difference being the state of the bed and wall color), bombing the center of the carpet will reveal a crawl space (Clean) or a trapdoor (Dirty) leading to the next floor.

Crawl SpaceCrawl Spaces[ | ]

Secret Trap Door

These Rooms are entered through Trapdoors with ladders in them. They can rarely be found under destroyed rocks. They can also be found using Collectible We Need To Go Deeper! iconWe Need To Go Deeper!, Rune of EhwazRune of Ehwaz, or under a Clean Bedroom's rug. These Rooms are viewed from the side, rather than the top like the rest of the Rooms in the game. Crawl Spaces usually contain an item or various pickups. Rarely, the Crawl Space will lead to a Black Market.

Black MarketBlack Markets[ | ]

Black markets are accessed through Rare Crawl Spaces. These Rooms are 2 Rooms wide and have shop items that can all be bought for 1 heart container, like devil deals. Black Markets also have a trapdoor to the next floor and various machines or beggars.

(in Repentance) Angel Room Shops[ | ]

Angel Room Shops are special holy shops, accessed if Isaac has Collectible The Stairway iconThe Stairway. The Stairway will spawn a ladder in the starting room of each floor that leads to each floor's Angel Room shop, a Shop that sells Angel deal items, has angel-related pickups, sometimes includes a coin beggar or a ConfessionalConfessional, and always includes an angel statue. This ladder disappears upon leaving the room.

(in Repentance) Secret Shops[ | ]

Secret Shop Trapdoor

Secret shops are accessed by buying a Collectible Member Card iconMember Card, opening up a 'special' Shop Trapdoor that leads to the floor's underground shop. Secret shops have a wider variety of items and pickups, sold at various expensive prices.

(in Repentance) Red RoomRed Rooms[ | ]

Red Room Door outline
Red Room Door opened

Red Rooms are special rooms created when using the Collectible Red Key iconRed Key (and Red Key wisps spawned with (in Repentance)Collectible Book of Virtues iconBook of Virtues), Crystal KeyCrystal Key, Cracked KeyCracked Key, or the Soul of CainSoul of Cain. The Red Key Rooms don't open without these items, and are spawned into existence at the closest red outline door when the item is used. The new Red Room can be a normal Room on this floor, or any special Room, aside from extra Ultra Secret Rooms and Boss Rooms. Red Rooms can't spawn where there aren't 4 connections out of the Room, not spawning if a touching room contains a bottomless pit on one wall, already is a secret room, or is a thin closet/hallway room. While inside a Red Room, the music of the floor will be slightly distorted.

Red rooms can only be spawned in an 13x13 radius from the the center room of the map, or six rooms from the center room in any direction; any farther will lead to entering an I AM ERROR Room.


I AM ERROR Rooms have a small chance of being reached upon using Telepills, and can be reached with other items such as Collectible Undefined iconUndefined and (in Repentance)Collectible Red Key iconRed Key. Every I AM ERROR Room contains a trapdoor to the next floor along with various pickups or items. The only way out of an I AM ERROR Room is through the trapdoor or by teleporting out.

Using Collectible Teleport 2.0 iconTeleport 2.0 when all other rooms have been explored guarantees to be teleported in an I AM ERROR room.

The I AM ERROR Room is a running gag within games that is a reference to the "I AM ERROR" easter egg in Zelda II: The Adventure of Link (1987)

Boss RushBoss Rush[ | ]

Boss Rush Door

If the player manages to beat Boss Mom ingameMom in under 20 minutes from the start of the run (visually indicated by the clock icon that appears during the cutscene between floors), a crack will open in the wall of the Boss Room upon defeating her, allowing entry to a large Room with 2 or 4 item pedestals in the center or the corners, often blocked by rocks or spikes. Taking one of the presented items will destroy the others and begin the Boss Rush.

  • (in Afterbirth † and Repentance)Collectible Mama Mega! iconMama Mega! can be used to open the Boss Rush entrance in the Mom Boss Room even after the 20 minute deadline, allowing access to the Boss Rush Room.
  • (in Afterbirth † and Repentance) The Collectible Broken Shovel 1 iconBroken Shovel opens the Boss Rush Room, even after the 20 minute deadline. The Trapdoor to the next Floor is also closed until Boss Rush is completed.
  • (in Repentance) Mausoleum Mom also spawns the Boss Rush Room if defeated within 25 minutes.

Mega Satan Arena[ | ]

Mega Satan Door

This long Room is only found in the starting Room of ChestChest and Dark RoomDark Room. Opening this door requires an item such as Collectible Dad's Key iconDad's Key or the two key pieces from Angels. Once the Room is entered, Isaac will have to face off against Mega Satan Head ingameMega Satan.

(except in Rebirth) ??? Entrance[ | ]

Blue Womb Door

If the player manages to beat Boss Mom's Heart ingameMom's Heart or Boss It Lives ingameIt Lives in under 30 minutes (visually indicated by the clock icon that appears during the cutscene between floors), a crack will open in the wall of the Boss Room upon defeating it, containing a room with a Trapdoor to (except in Rebirth)??????.

(in Repentance) Mother Arena[ | ]

Mother Trapdoor

Mother's arena is accessible by a large pit in the ground in the Boss Room of (in Repentance)CorpseCorpse II. Dropping down into the pit leads to Mother's unique transforming boss room.

(except in Rebirth) Greed Exit Rooms[ | ]

Greed Exit Door opened

Exit Rooms are Rooms with the defining feature of having a Trapdoor/exit to the next Floor.

Greed Exit Rooms start metal barred and unbombable, like miniboss rooms, but will be unbarred and accessible once ten waves of enemies are defeated.

  • Greed Exit Rooms have a special door, having a special black exit doorway in the main greed room, but having a normal floor colored doorframe when in the room itself.

Exit Rooms may contain pickups, chests, and enemies.

(in Afterbirth † and Repentance) Greedier Exit Rooms[ | ]

Greedier Exit Rooms are almost exactly the same as the Greed Mode Exit Room, except they take 11 rounds to open.

(in Repentance) Alternate Path Exit Rooms[ | ]

Downpour entrance door
Downpour entrance door locked
Mines entrance door
Mines entrance door locked 2
Mines entrance door locked 1
Mausoleum entrance door
Mausoleum entrance door locked

When unlocked, these Rooms appear attached to a Main Path Boss Room once the Boss is defeated (or appear at the end of Alternate Path Chapter). These Rooms contain an entrance to the Alternate Path Floors. These Rooms have different requirements to open them, based on the Chapter they are barring entrance to:

  1. In floors 1-2, the door requires a key to unlock the entrance to Downpour or Dross.
  2. In floors 3-4, the door requires two bombs to unlock the entrance to Mines or Ashpit.
  3. In floors 5-6, the door requires sacrificing two hearts to unlock the entrance to Mausoleum or Gehenna (except on Depths II and its variants, where this door doesn't appear).

(in Repentance) A Strange Door Exit Room[ | ]

A Strange Door locked

When unlocked, this room appears above the starting room of the second floor of Chapter 3, containing a trapdoor leading to a special version of the second floor of Chapter 3.5. This door can only be opened by obtaining and sacrificing either Collectible The Polaroid iconThe Polaroid, Collectible The Negative iconThe Negative, or (except in Rebirth)Faded PolaroidFaded Polaroid.

(in Afterbirth † and Repentance) Grave Rooms[ | ]

Grave Rooms are Rooms that appear in the Dark RoomDark Room which only contain 1-3 Dirt Patches. Character The Forgotten iconThe Forgotten is unlocked by reaching this room and digging with (in Afterbirth † and Repentance)Collectible Mom's Shovel iconMom's Shovel.


(in Repentance) Mirror RoomMirror Room[ | ]

Mirror Door

The Mirror Room is a single special room found on the second floor of Chapter 1.5, containing a single mirror on either the left or right doorway location. This mirror can be broken by explosions, but also can be entered to explore the Mirrored World, a replica of the current floor, to find (in Repentance)Collectible Knife Piece 1 iconKnife Piece 1. The mirror can only be entered by Character The Lost iconThe Lost, Character Tainted Lost iconTainted Lost, Character Tainted Forgotten iconTainted Forgotten, and Character Tainted Jacob iconTainted Jacob's ghost form. All other characters must touch the white fire which always generates on the second floor of Chapter 1.5 in order to temporarily become The Lost if they want to enter the mirror.

(in Repentance) Mine Cart RoomMine Cart Room[ | ]

Mineshaft Door locked
Mineshaft Door opened
Mineshaft Door blocked

The Mine Cart Room is a single special room found on the second floor of Chapter 2.5 only if Isaac already has (in Repentance)Collectible Knife Piece 1 iconKnife Piece 1. It contains a Yellow Button, a single minecart, a blocked door at the top of the room and occasionally some enemies.

There are 2 other Yellow Buttons located randomly on the same floor and pressing all 3 repairs the minecart's track allowing access through the blocked door. Alternatively having Flight and 2 bombs also allows access through the door. The area past the blocked door contains (in Repentance)Collectible Knife Piece 2 iconKnife Piece 2 and a chase sequence with (in Repentance) Mother's ShadowMother's Shadow. The door is permanently blocked after leaving the sub-area.

Notes[ | ]

  • In regular Rooms with unreachable enemies, the doors will automatically open after a while to prevent Isaac from becoming unable to progress. See here for the specific details.
    • This will not occur if Isaac has flight or if there is a boss or miniboss in the Room.
    • This will not occur in Rooms with Pressure PlatePressure Plates that do not have enemies or only have indestructible enemies such as Wall HuggerWall Huggers or Stone GrimaceStone Grimaces.
  • Rooms that have obstacles in the middle covered by pits can often drop the room reward in the place of the destroyed obstacle. Because of that, it is advised avoiding touching that obstacle if you really need consumables/pickups.

Gallery[ | ]