Secret Room

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Secret Room Door.png

Secret Rooms are rooms that are not normally visible on the map and must be bombed into to access. Regular secret rooms are usually located next to 2 to 4 rooms, while super secret rooms can only be next to one room. Very rarely, the regular secret room may also be located next to only one room. Entrances to Secret Rooms will never have rocks or gaps in the way. Secret Rooms usually contain at least one shopkeeper. Secret Rooms stay open after bombing them.

Possible Spawns[edit | edit source]

Seeds[edit | edit source]

 PC  Normal mode only 927Q 481S (Secret Room above Treasure Room is not attached to any others)

 PC  Hard mode only 2CC7 S7YG (Secret room is attached to only one room; located on the eastern wall in the most eastern room starting from the spawn room)

Super Secret Rooms[edit | edit source]

Secret Room Door.png

Super Secret Rooms are only located next to one other room, and this room can't be a special room (item, shop, boss, etc.). Each Super Secret room has set drops depending on the floor. Note that the type of Super Secret Room is not limited to certain floors it mimics (e.g. one can find a Womb-themed Super Secret Room in the Depths).

Possible Spawns[edit | edit source]

ID Floor layout Contents Image preview
0 The Womb The Womb 8 Red Hearts. Only red hearts can spawn in this room, regardless of any items. If you let Dark Bum Dark Bum collect the hearts, he will drop red hearts instead of soul hearts. Allow him to pick up the hearts and leave the room quickly, where he will drop the soul hearts or black hearts outside. Secretheart.png
1 Cathedral Cathedral Eternal Heart. Only eternal hearts can spawn in this room, regardless of any items used. For example, using The Jar The Jar will drop Eternal Hearts on the ground instead of regular hearts. Using VI - The Lovers VI - The Lovers or V - The Hierophant V - The Hierophant will do the same, too. Eternalheartroom.png
2 Sheol Sheol Red Chest. Secretredchest.png
3 Necropolis Necropolis Fortune Telling Machine. Secretmachine.png
4 The Cellar The Cellar Random trinket. Secrettricket.png
5 The Basement The Basement 5 pills. Secretpills.png
6 Added in Afterbirth Library Black Heart. Only black hearts can spawn in this room, regardless of items used. This applies to VI - The Lovers VI - The Lovers, and similar items. SecretLibrary.png
7 Dark Room Dark Room Removed in Afterbirth Black Heart. Blackheartroom.png
Added in Afterbirth 4 Nulls and 5 pills or runes. SecretDarkRoom.png
8 Burning Basement Burning Basement A Shopkeeper, 2 Bomb Chests, 3 TNT, and 18 Fire Places, including Red Fire Places. SecretBurningBasement.png
9 Flooded Caves Flooded Caves A black poop surrounded by 6 spikes. SecretBlackPoop.png
10 Added in Afterbirth I AM ERROR Can include any of the following: Mom's Hand, Rag Man, random pickups, chests, cards, trinkets, pills and items. Unknown Room.png
11 Added in Afterbirth The Womb The Womb 4 red poops and 3 Double Hearts. SecretOnePlusOneFree.png
12 Added in Afterbirth † Cathedral Cathedral 3 Soul Hearts, 2 Blue Fire Places and an angel Statue in the center which will drop its key piece upon death. SecretAngel.png
13 Sheol Sheol 3 Black Hearts and 2 Black Globin's Heads. SecretGlobinHeads.png
14 Shop A Beggar and a Blood Donation Machine. SecretShop.png
15 Added in Afterbirth † The Womb The Womb A red poop, 3 Black Flies and a random amount of Red Hearts and Half Red Hearts. It can also contain a random amount of any other heart types, except Double Hearts. SecretWombNew.png
16 Added in Afterbirth † Cathedral Cathedral A rainbow poop, 3 Black Flies and 2 Eternal Hearts. SecretRainbow.png
17 Added in Afterbirth † Sheol Sheol A black poop, 3 Black Flies and 6 Red Chests. SecretSheolNew.png
18 Added in Afterbirth † Shop 3 Slot Machines and 2 Fortune Telling Machines. SecretShopMachines.png
19 Added in Afterbirth † The Basement The Basement A red poop, 9 pills and 3 Black Flies. SecretBasementNew.png

Added in Afterbirth Greed Mode[edit | edit source]

In Greed Mode, Super Secret Rooms have different layouts.

ID Floor layout Contents Image preview
0 The Womb The Womb 5 Red Hearts; only Red Hearts can spawn in this room, regardless of items used. SuperSecret Greed0.png
1 Arcade 5 Pennies. SuperSecret Greed1.png
2 The Caves The Caves 3 Keys. SuperSecret Greed2.png
3 Burning Basement Burning Basement 3 Bombs. SuperSecret Greed3.png
4 Cathedral Cathedral 2 Soul Hearts. SuperSecret Greed4.png
5 Library A Black Heart. SuperSecret Greed5.png
6 The Chest The Chest A Chest; small chance to spawn another type of chest instead. SuperSecret Greed6.png
7 The Chest The Chest A Bomb Chest. SuperSecret Greed7.png
8 Sheol Sheol A Red Chest. SuperSecret Greed8.png
9 The Basement The Basement 4 pills. SuperSecret Greed9.png
10 Library 2 cards. SuperSecret Greed10.png
11 The Cellar The Cellar 4 Lil' Batteries. SuperSecret Greed11.png
12 Dark Room Dark Room 2 runes. SuperSecret Greed12.png
13 Sheol Sheol 2 Red Chests. SuperSecret Greed13.png
14 The Cellar The Cellar 2 trinkets. SuperSecret Greed14.png
15 The Cellar The Cellar A trinket. SuperSecret Greed15.png
16 Bedroom A bed. SuperSecret Greed16.png
17 I AM ERROR A trapdoor to the next floor. SuperSecret Greed17.png
18 The Basement The Basement 17 piles of poop. SuperSecret Greed18.png
19 The Shop The Shop A Golden Bomb. SuperSecret Greed19.png
20 The Shop The Shop A golden poop. SuperSecret Greed20.png
21 The Shop The Shop A Golden Key. SuperSecret Greed21.png
22 The Catacombs The Catacombs A random item from the Greed mode Treasure Room pool. SuperSecret Greed22.png
23 The Chest The Chest 2 Locked Chests. SuperSecret Greed23.png
24 Cathedral Cathedral 1 Eternal Heart. SuperSecret Greed24.png
25 The Womb The Womb 1 Half Red Heart. SuperSecret Greed25.png

Notes[edit | edit source]

  • Secret rooms are found by bombing the middle of a wall in a standard size room. For larger size rooms, divide the room mentally into the size of individual rooms to figure out where to bomb. For closet-size rooms, Secret rooms will never be found by bombing the sides but may be found by bombing the wall at the end of the closet.
  • Rooms adjacent to secret rooms will always have a clear, walkable path to the middle of the wall where you can set a bomb. Secret Room entrances are never found in front of gaps, obstacles, or spikes. All the rooms next to a Secret Room must satisfy these requirements, so if one room near a suspicious gap in the map fails these requirements, then look elsewhere.
    • Cobwebs are sometimes next to Secret Room entrances.
  • If there are no valid Secret Room locations surrounded by 3 or 4 rooms, it is possible for a Secret Room to be adjacent to only 1 or 2 rooms.
A secret room adjacent to only one room
A secret room adjacent to only one room
  • X-Ray Vision X-Ray Vision opens all available entrances to both the secret room and the super secret room. The I Can See Forever pill does the same for the floor on which the pill was used.
  • Teleportation items can randomly teleport Isaac into Secret Rooms, and XVIII - The Moon XVIII - The Moon card will always teleport Isaac to the Secret Room.
  • Secret Rooms are revealed on the map with Crystal Ball Crystal Ball, Book of Secrets Book of Secrets, XXI - The World XXI - The World card, XIX - The Sun XIX - The Sun card, Spelunker Hat Spelunker Hat, Blue Map Blue Map, or The Mind The Mind, but you'll still need to open their entrance.
  • Black Flies and Spiders can sometimes be found in the room, and you won't be able to exit the Secret Room until you clear out the enemies.
  • If Greed or Super Greed spawn into the Secret Room, you won't be able to exit it (like a Mini-Boss room), but once the fight ends, all the exits of the Secret Room will be accessible.
  • Secret Rooms can exist next to all types of rooms except Boss Rooms, allowing certain restricted rooms to be entered.
    • Even if you have no keys, it is possible to bomb into a locked special room should there exist an adjacent Secret Room. Leaving through the door will unlock the room without requiring a key.
    • It is possible to enter Curse Rooms without taking damage by bombing in from a secret room.
    • It is possible to access Challenge Rooms even if you don't meet the health requirements, but it is not possible to "steal" the items, as the hole will be blocked up as soon as the fighting stage begins. However, items can still be stolen by using Telepills or other teleportation items. The Challenge Room will not be accessible from the Secret Room if the Secret Room contained a fight with Super Greed. Boards will remain over the entrance to the challenge room even after the fight is over.
  • Super secret rooms replace the dead-end room that would require the 2nd most rooms walked through from the start room to access, and cannot be connected to the secret room.
    • For reference, the Boss Room takes the dead-end room that would require the most rooms walked through, and the Shop takes the room that would require the 3rd most. This means that the Super Secret Room is equally as far or further from the start room than the Shop. It also means the Super Secret Room tends to be close to the Boss Room. Loops and large rooms connected to more than one room on any given side can tamper with this logic, however.
  • Super Secret Rooms can have layouts from floors the player hasn't unlocked yet.

Trivia[edit | edit source]

  • In the original Binding of Isaac, secret rooms worked differently; if the player left a room after opening a secret room entrance, the entrance would close. To open the room, the player needed another bomb to open the entrance.

Bugs[edit | edit source]

Bug Bug! After defeating an Angel spawned in a Super Secret Room, the music will not return to the floor's regular music.
Bug Bug! Teleporting to the Super Secret Room in Greed or Greedier Mode, when the room is generated behind a still-locked Treasure Room, will trap the player inside.

SmallIsaac.png Rooms SmallIsaac.png

Boss Room Icon.png
Boss Room
Mini-Boss Room Icon.png
Mini-Boss Room
Treasure Room Icon.png
Treasure Room
Shop Icon.png
Arcade Icon.png
Challenge Room Icon.png
Challenge Room
Boss Challenge Room Icon.png
Boss Challenge Room
Curse Room Icon.png
Curse Room
Sacrifice Room Icon.png
Sacrifice Room
Room 1x1 small.png
Secret Room Icon.png
Secret Room
Super Secret Room Icon.png
Super Secret Room
Library Icon.png
Devil Room Icon.png
Devil Room
Angel Room Icon.png
Angel Room
Vault Icon.png
Dice Room Icon.png
Dice Room
Bedroom Icon.png Bedroom2 Icon.png
Room 1x1.png
Grave Room
Super Secret Room Icon.png
Boss Rush
Super Secret Room Icon.png
Crawl Space
Super Secret Room Icon.png
Black Market
Super Secret Room Icon.png
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