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Secret Room Door.png Secret Room Secret Rooms are rooms that are not normally visible on the map and are usually accessed by bombing a wall leading to them. Regular Secret Rooms are usually located next to 2 to 4 rooms, while Super Secret Room Super Secret Rooms can only be next to one room; they are placed on one of the dead ends generated on the map, similar to other Special Rooms. 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 Shopkeeper. Secret Rooms stay open after bombing them.

Variations[]

The following room maps were made using Basement Renovator[1] for cleaner viewing; note that all Urns you see will be Mushrooms when encountered in-game.

Possible Layouts[]

ID Weight Contents Image preview
0 1.0 1 Shopkeeper Shopkeeper, 2 Fire Place Fire Places, and 1 Secret Room item. SecretRoom 0.png
1 1.0 1 Shopkeeper, 2 Fire Places, and 3 random Coins. SecretRoom 1.png
2 1.0 1 Shopkeeper, 2 Fire Places, 4 Rocks and 6 random Coins. SecretRoom 2.png
3 1.0 1 Shopkeeper, 2 Fire Places, 4 Rocks, and 9 random Coins. SecretRoom 3.png
4 1.0 1 Shopkeeper, 4 Rocks, and 1 Slot Machine.png Slot Machine. SecretRoom 4.png
5 1.0 1 Shopkeeper, 5 Mushrooms, 4 Cobwebs, and 3 random Pickups. SecretRoom 5.png
6 1.0 1 Shopkeeper, 2 TNT TNT, 4 Rocks, and 1 Chest Chest. SecretRoom 6.png
7 1.0 1 Shopkeeper, 2 Mushrooms, and 3 random Pills. SecretRoom 7.png
8 1.0 1 Shopkeeper surrounded by 4 Cobwebs, and 3 random Coins. SecretRoom 8.png
9 1.0 1 Shopkeeper, 2 Fire Places, 4 Rocks in each corner, and 3 random Bomb Bomb pickups. SecretRoom 9.png
10 Removed in Repentance
1.0
Added in Repentance
0.75
1 Shopkeeper, 2 Fire Places, 2 Red Fire Places, and a Lil' Battery Lil' Battery. SecretRoom 10.png
11 1.0 1 Shopkeeper, and 2 random Key Key pickups. SecretRoom 11.png
12 1.0 4 Shopkeepers, 1 Red Fire Place, and 2 random Bomb pickups. SecretRoom 12.png
13 1.0 1 Key Master.png Key Master, 2 Mushrooms, and 1 random Key pickup.
Removed in Repentance This is the only Secret Room that doesn't have a Shopkeeper.
SecretRoom 13.png
14 Removed in Repentance
1.0
Added in Repentance
0.5
3 Shopkeepers, and 1 Golden Poop Golden Poop. SecretRoom 14.png
15 1.0 1 Shopkeeper, 20 Mushrooms, and 1 Double Bomb Double Bomb. SecretRoom 15.png
16 Removed in Repentance
1.0
Added in Repentance
0.25
1 Shopkeeper, 2 Fire Places, and 1 Corny Poop. SecretRoom 16.png
17 Added in Afterbirth Removed in Repentance
1.0
Added in Repentance
0.25
1 Shopkeeper, 2 Fire Places, 2 Rocks, and 2 Reward Plate Reward Plates. SecretRoom 17.png
18 Added in Afterbirth 1.0 1 Shopkeeper, 2 Fire Places, 20 Cobwebs, 4 Spider Spiders, and 4 random pickups. SecretRoom 18.png
19 Added in Afterbirth Removed in Repentance
1.0
Added in Repentance
0.5
2 Shopkeepers in the upper 2 corners, with 4 more plus a Secret Room item on the other side of several gap in the floor. There are four obstacles that have equal, independent chances of being Blocks, Fire Places, Rocks, and/or Spikes; if they are Rocks, they can be bombed to bridge the gap and allow access to the room's center. SecretRoom 19.png
20 Added in Afterbirth Removed in Repentance
1.0
Added in Repentance
0.25
1 Shopkeeper, 2 Fire Places, and 1 Reward Plate. SecretRoom 20.png
21 Added in Afterbirth 1.0 1 Shopkeeper, 2 Fire Places, and several Rocks and Key Blocks blocking access to 2 rewards in the upper corners. The rewards have equal, independent chances of being Chests, Locked Chest Locked Chests, Added in Afterbirth Grab Bag Grab Bags, Secret Room items, and/or random pickups. SecretRoom 21.png
22 Added in Afterbirth 1.0 3 Shopkeepers, 2 Fire Places, and 1 Nickel Nickel. SecretRoom 22.png
23 Added in Afterbirth † 1.0 1 Shopkeeper, 2 Fire Places, 1 Grab Bag, and 1 Shop Restock Machine.png Shop Restock Machine. SecretRoom 23.png
24 Added in Afterbirth † Removed in Repentance
1.0
Added in Repentance
0.25
1 Shopkeeper, 2 Blocks, and 10 Mushrooms. SecretRoom 24.png
25 Added in Afterbirth † Removed in Repentance
1.0
Added in Repentance
0.5
1 Shopkeeper, 2 Fire Places, and 2 Grab Bags. SecretRoom 25.png
26 Added in Afterbirth † Removed in Repentance
1.0
Added in Repentance
0.5
1 Shopkeeper, 2 Fire Places, 2 Poops, 6 Mushrooms, and 1 Troll Bomb Troll Bomb which will blow up 3 of the Mushrooms and the Shopkeeper. SecretRoom 26.png
27 Added in Afterbirth † Removed in Repentance
1.0
Added in Repentance
0.25
1 Shopkeeper, 2 Fire Places, and 2 Reward Plate Reward Plates. SecretRoom 27.png
28 Added in Afterbirth † 0.1 1 Shopkeeper, 2 Fire Places, 2 Chest Chests, 1 Poop surrounded by 3 Fly Flies, and 1 Secret Room item. SecretRoom 28.png
29 Added in Afterbirth † 0.1 5 Shopkeepers, and 1 Secret Room item behind 4 Blocks and 4 Purple Fire Places. SecretRoom 29.png
30 Added in Repentance 0.1 1 Shopkeeper, 2 Fire Places, 2 Poops, and 1 Mega Battery Mega Battery. SecretRoom 30.png
31 Added in Repentance 0.25 1 Shopkeeper, 4 Fire Places, 44 Rocks, and 1 Rainbow Poop Rainbow Poop. SecretRoom 31.png
32 Added in Repentance 1 1 Shopkeeper, 2 Poops, 10 Mushrooms, and 5 random Coins. SecretRoom 32.png
33 Added in Repentance 0.5 2 Shopkeeper, 4 Fire Places, 2 Rocks, and 4 Spiked Rocks which surround 1 random Card. SecretRoom 33.png
34 Added in Repentance 0.5 1 Shopkeeper, 2 Fire Places, 4 Mushrooms, and 1 Secret Room item surrounded by 4 Spikes cardinally and 4 Spiked Rocks diagonally. SecretRoom 34.png
35 Added in Repentance 1 1 Shopkeeper, 3 random Coins, along with 1 Chest Chest and 1 Locked Chest Locked Chest each in the upper corners that are both blocked by 2 Spiked Rocks. SecretRoom 35.png
36 Added in Repentance 1 2 Shopkeepers, 1 Spiked Rock in each corner, and 1 random Chest that is surrounded by Rocks, which can be destroyed with 1 nearby TNT TNT which is itself behind Spikes on each side. SecretRoom 36.png
37 Added in Repentance 0.5 One Rotten Beggar.png Rotten Beggar, 4 Mushrooms, and 3 random Coins. SecretRoom 37.png
38 Added in Repentance 0.5 1 Shopkeeper, 2 Fire Places, 1 Block in each corner, and 1 Wooden Chest Wooden Chest. SecretRoom 38.png

Starting from the second floor of Chapter 2 onward, Greed Greed and Super Greed Super Greed have a chance to replace Secret Rooms.

Added in Repentance Alternate Variations[]

Secret Rooms in alternate chapters (Downpour Downpour, Dross Dross, Mines Mines, Ashpit Ashpit, Mausoleum Mausoleum, Gehenna Gehenna and Corpse Corpse) differ from the standard layouts. Each alternate floor has 11 unique layouts (12 in Downpour Downpour). Regular Secret Room layouts cannot appear on these floors.

Super Secret Rooms[]

Secret Room Door.png

Super Secret Room Super Secret Rooms are only located next to one other room, and this room can't be a Special Room; in other words, it is placed on one of the floor's dead ends, like any other Special Room. 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. Isaac can find a Womb Womb-themed Super Secret Room in Depths Depths).

Super Secret Rooms are most likely to be found either at the end of a series of rooms that lead to a dead-end, and is particularly likely to appear near the Boss Room Boss Room, as they are the second room type to be placed on a map during Map Generation, and are therefore placed far away from the room Isaac starts in.

Possible Layouts[]

ID Weight Room theme Contents Image preview
0 1 Womb Womb 8 random Red Heart Red Hearts. Only Red Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will create 2 Red Hearts rather than Soul Hearts). SuperSecretRoom 0.png
1 1 Cathedral Cathedral 1 Eternal Heart Eternal Heart. Only Eternal Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will drop 2 Eternal Hearts rather than Soul Hearts). SuperSecretRoom 1.png
2 1 Sheol Sheol 1 Red Chest Red Chest. SuperSecretRoom 2.png
3 1 Necropolis Necropolis 1 Fortune Telling Machine.png Fortune Telling Machine. SuperSecretRoom 3.png
4 1 Cellar Cellar 1 random trinket. SuperSecretRoom 4.png
5 1 Basement Basement 5 random Pills. SuperSecretRoom 5.png
6 Added in Afterbirth 0.5 Library Library 1 Black Heart Black Heart. Only Black Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will drop 2 Black Hearts rather than Soul Hearts). SuperSecretRoom 6.png
7 0.1 Dark Room Dark Room Removed in Afterbirth 1 Black Heart. SuperSecretRoom 7 Rebirth.png
Added in Afterbirth 1 Nulls Nulls in each corner, and 5 random Pills/Runes. SuperSecretRoom 7 Afterbirth.png
8 Added in Afterbirth 0.5 Burning Basement Burning Basement 1 Shopkeeper Shopkeeper, 2 Bomb Chest Bomb Chests, 3 TNT TNT, 13 Fire Place Fire Places, and 5 Red Fire Place Red Fire Places.
Added in Repentance All Fire Places in the room will be extinguished if this room appears in Downpour Downpour or Dross Dross.
SuperSecretRoom 8.png
9 Added in Afterbirth 0.1 Flooded Caves Flooded Caves 1 Black Poop Black Poop surrounded by 6 retracting Spikes. SuperSecretRoom 9.png
10 Added in Afterbirth 0.5 I AM ERROR I AM ERROR room Can contain any of the following: Mom's Hand Mom's Hand, Rag Man Rag Man, random pickups, Chest Chests, Cards, trinkets, Pills, and/or items. SuperSecretRoom 10.png
11 Added in Afterbirth 1 Womb Womb 4 Red Poop Red Poops, and 3 Double Heart Double Hearts. SuperSecretRoom 11.png
12 Added in Afterbirth † 0.1 Cathedral Cathedral 3 Soul Heart Soul Hearts, 2 Blue Fire Place Blue Fire Places, and an Angel Statue which will summon an Angel if blown up, who will then drop a Key Piece upon death. SuperSecretRoom 12.png
13 Added in Afterbirth † 0.1 Sheol Sheol 3 Black Heart Black Hearts, and 2 Black Globin's Head Black Globin's Heads. SuperSecretRoom 13.png
14 Added in Afterbirth † 1 Shop Shop 1 Beggar.png Beggar, and 1 Blood Donation Machine.png Blood Donation Machine. SuperSecretRoom 14.png
15 Added in Afterbirth † 0.1 Womb Womb 1 Red Poop surrounded by 3 Fly Flies, and a random number of various types Red Heart Red Hearts, except Double Heart Double Hearts. SuperSecretRoom 15.png
16 Added in Afterbirth † 0.1 Cathedral Cathedral 1 Rainbow Poop Rainbow Poop surrounded by 3 Fly Flies, and 2 Eternal Heart Eternal Hearts. SuperSecretRoom 16.png
17 Added in Afterbirth † 0.1 Sheol Sheol 1 Added in Afterbirth Black Poop Black Poop surrounded by 3 Fly Flies, and 6 Red Chest Red Chests. SuperSecretRoom 17.png
18 Added in Afterbirth † 0.1 Shop Shop 2 Fortune Telling Machine.png Fortune Telling Machines and 3 Slot Machine.png Slot Machines. SuperSecretRoom 18.png
19 Added in Afterbirth † 0.1 Basement Basement 1 Red Poop Red Poop surrounded by 3 Fly Flies, and 9 random Pills. SuperSecretRoom 19.png
20 Added in Repentance 0.5 Library Library 1 Battery Bum.png Battery Bum, 4 Urns, 2 Cobwebs, and 3 random Coins. SuperSecretRoom 20.png
21 Added in Repentance 0.5 Burning Basement Burning Basement 1 Bomb Bum.png Bomb Bum, 3 Rocks and 3 Fire Places in each corner, and 4 random Bomb Bomb pickups. SuperSecretRoom 21.png
22 Added in Repentance 0.25 Basement Basement 1 Shopkeeper Shopkeeper, and 4 Greed Gaper Greed Gapers. SuperSecretRoom 22.png
23 Added in Repentance 0.5 Corpse Corpse 1 Spiked Rock in each corner, and 3 Rotten Heart Rotten Hearts. SuperSecretRoom 23.png
24 Added in Repentance 0.5 Arcade Arcade 5 Micro Battery Micro Batteries. The middle one has a 50% chance to be a Lil' Battery Lil' Battery. SuperSecretRoom 24.png
25 Added in Repentance 0.25 Dank Depths Dank Depths 1 pickup which has an 83% chance to be a Golden Key Golden Key and a 17% chance to be a Golden Bomb Golden Bomb, surrounded diagonally by 4 Skulls. SuperSecretRoom 25.png
26 Added in Repentance 0.01 Ashpit Ashpit 8 Urns, and 1 lit Giga Bomb Giga Bomb that explodes shortly after. SuperSecretRoom 26.png
27 Added in Repentance 1 Corpse Corpse 1 Rotten Beggar.png Rotten Beggar, and 1 Blood Donation Machine.png Blood Donation Machine. SuperSecretRoom 27.png
28 Added in Repentance 0.5 Mausoleum Mausoleum 3 Urns in each corner, and 2 Black Sack Black Sacks. SuperSecretRoom 28.png
29 Added in Repentance 0.25 Gehenna Gehenna 4 Spikes, and 1 Golden Battery Golden Battery. SuperSecretRoom 29.png
30 Added in Repentance 0.25 Chest Chest 1 Mega Chest Mega Chest, and 2 random Key Key pickups. SuperSecretRoom 30.png
31 Added in Repentance 0.5 Cellar Cellar 4 Rocks, and 2 Wooden Chest Wooden Chests. SuperSecretRoom 31.png
32 Added in Repentance 1 Cathedral Cathedral 1 Confessional.png Confessional. SuperSecretRoom 32.png

Added in Afterbirth Greed Mode Layouts[]

Greed Mode has its own set of Super Secret Room layouts.

ID Weight Room theme Contents Image preview
0 1 Womb Womb 5 Red Heart Red Hearts. Only Red Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will create 2 Red Hearts rather than Soul Hearts). SuperSecret Greed0.png
1 1 Arcade Arcade 5 Penny Pennies. SuperSecret Greed1.png
2 1 Catacombs Catacombs 3 Key Keys. SuperSecret Greed2.png
3 1 Burning Basement Burning Basement 3 Bomb Bombs. SuperSecret Greed3.png
4 1 Cathedral Cathedral 2 Soul Heart Soul Hearts. Only Soul Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. VI - The Lovers VI - The Lovers will create 2 Soul Hearts rather than Red Hearts). SuperSecret Greed4.png
5 1 Library 1 Black Heart Black Heart. Only Black Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will create 2 Black Hearts rather than Soul Hearts). SuperSecret Greed5.png
6 1 Chest Chest 1 Chest Chest; small chance to spawn another type of Chest instead. SuperSecret Greed6.png
7 1 Chest Chest 1 Bomb Chest Bomb Chest. SuperSecret Greed7.png
8 1 Sheol Sheol Removed in Repentance 1 Red Chest Red Chest. SuperSecret Greed8 Afterbirth.png
Added in Repentance 2 Red Chests. SuperSecret Greed8 Repentance.png
9 1 Basement Basement 4 random Pills. SuperSecret Greed9.png
10 1 Library Library 2 random Cards. SuperSecret Greed10.png
11 1 Cellar Cellar 4 Lil' Battery Lil' Batteries. Added in Repentance Each battery has a 50% chance to be a Micro Battery Micro Battery instead. SuperSecret Greed11.png
12 1 Dark Room Dark Room 2 random Runes. SuperSecret Greed12.png
13 0.5 Sheol Sheol Removed in Repentance 2 Red Chest Red Chests. SuperSecret Greed8 Repentance.png
Added in Repentance 3 Red Chests. SuperSecret Greed13 Repentance.png
14 1 Cellar Cellar 2 random trinkets. SuperSecret Greed14.png
15 0.5 Cellar Cellar 1 random trinket. SuperSecret Greed15.png
16 1 Clean Bedroom Clean Bedroom 1 bed. SuperSecret Greed16.png
17 1 I AM ERROR I AM ERROR room 1 trapdoor to the next floor. SuperSecret Greed17.png
18 0.5 Basement Basement 17 Poop Poops. SuperSecret Greed18.png
19 0.25 The Shop The Shop 1 Golden Bomb Golden Bomb. SuperSecret Greed19.png
20 0.5 The Shop The Shop 1 Golden Poop Golden Poop. SuperSecret Greed20.png
21 0.25 The Shop The Shop 1 Golden Key Golden Key. SuperSecret Greed21.png
22 1 Secret Room Secret Room Removed in Repentance 1 Greed Mode Treasure Room item.
Added in Repentance 1 Greed Mode Secret Room item.
SuperSecret Greed22.png
23 1 Chest Chest 2 Locked Chest Locked Chests. SuperSecret Greed23.png
24 1 Cathedral Cathedral 1 Eternal Heart Eternal Heart. Only Eternal Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will create 2 Eternal Hearts rather than Soul Hearts). SuperSecret Greed24.png
25 1 Womb Womb 1 Half Red Heart Half Red Heart. Only Half Red Hearts can be created in this room, regardless of what item is used to create said Hearts (e.g. V - The Hierophant V - The Hierophant will create 2 Half Red Hearts rather than Soul Hearts). SuperSecret Greed25.png
26 Added in Repentance 0.1 Arcade Arcade 1 Golden Penny Golden Penny. SuperSecret Greed26.png
27 Added in Repentance 0.5 Necropolis Necropolis 1 Greed Mode Secret Room item surrounded by pits and 2 spike rocks that can fill up pits when destroyed from a certain direction. SuperSecret Greed27.png

Added in Repentance Ultra Secret Rooms[]

Ultra Secret Room Ultra Secret Rooms are special rooms that are not connected to any other room on the map directly. They are not revealed by most mapping effects (The Mind The Mind, etc.) and can only be revealed on the map with Cracked Orb Cracked Orb, Book of Secrets Book of Secrets wisps, and Rune Shard Rune Shard. They can be accessed directly by opening Red Room Red Rooms adjacent to them using Red Key Red Key or Red Key wisps, Crystal Key Crystal Key, Cracked Key Cracked Key, and Soul of Cain Soul of Cain: entering a Red Room next to the Ultra Secret room will reveal its position and automatically open the doorway leading into it. It can also be entered by teleporting to it using XVIII - The Moon? XVIII - The Moon?; when teleported into, a pathway of Red Rooms back to the rest of the level will be opened automatically. Ultra Secret rooms contain items from the Ultra Secret Room item pool.

Ultra Secret rooms are most likely generated in spots that connect to the highest number of non-red rooms through its adjacent red rooms (different squares in L rooms count as 2). There is about a 20% chance that it will select the next most likely spot and another 20% for the one after and so on. Which means it has about an 80% chance to select the 1st spot, 16% chance for the 2nd, 3% for the 3rd and less than 1% for the 4th.

Ultra Secret Rooms can't be connected to Secret Rooms or Super Secret Rooms (as of 1.7.5), and can't be in a location where any of its adjacent red rooms are invalid, such as next to a Boss Room Boss Room (Boss Rooms in The Void The Void can have red rooms next to them, but the Ultra Secret Room will never be connected to one), next to the sides of narrow rooms, or any room that can't have a red room opened on that specific side, however locations on the 13x13 border where a red room would normally open to an I AM ERROR I AM ERROR room are allowed.

ID Weight Room theme Contents Image preview
0 1 A map without an USR No USR Spawn.jpg

Notes[]

  • Generally, the best strategy for finding Ultra Secret Rooms is by checking the location that connects to the highest number of non-red rooms, and if it's not there, checking the spot with the next highest number.
  • If the only remaining valid locations are connected to a single non-red room, it's just as likely for the Ultra Secret Room to be connected to the side of a single room as it is connected to a corner.
  • The doors of the Ultra Secret Room are opened automatically only when approached from the outside. If other rooms exist adjacent to it, the doors will not open from inside the Ultra Secret Room without bombing them or returning from the outside.
    • Red Key or Cracked Keys must be used before the bombs, as otherwise explosions won't have an effect.
  • In the Mirrored World, the Ultra Secret Room will be empty, same as any Special Room.
  • It's possible for the Ultra Secret Room to not generate if there are no valid locations.

Layouts[]

ID Weight Contents Image preview
0 ? 2 Shopkeeper Shopkeepers, 4 Poop Poops behind Key Blocks, some Cobwebs, 2 random Key Keys, and 1 Ultra Secret Room item. UltraSecretRoom 0.png
1 ? Several Key Blocks and Metal Blocks along the walls, and 1 Ultra Secret Room item. UltraSecretRoom 1.png
2 ? 2 Shopkeepers, several Key Blocks, and 1 Ultra Secret Room item. UltraSecretRoom 2.png
3 ? 1 Shopkeeper behind Key Blocks, a few Cobwebs, and 1 Ultra Secret Room item blocked off by Key Blocks and Metal Blocks. UltraSecretRoom 3.png
4 ? 1 Shopkeeper, a few Cobwebs, and Rocks in the shape of a Key, with 1 Ultra Secret Room item inside the Key's 'loop'. UltraSecretRoom 4.png
5 ? 2 Shopkeepers, a few Cobwebs, several Urns, 3 random Coins, and 4 Greed Gaper Greed Gapers guarding 1 Ultra Secret Room item. UltraSecretRoom 5.png
6 ? 10 Shopkeepers, 2 Fire Place Fire Places, a Rock, some Cobwebs, and 2 Ultra Secret Room item. UltraSecretRoom 6.png
7 ? 2 Shopkeepers, some Cobwebs, a Rock, 10 Key Keys, and 2 Key Ring Key Rings. UltraSecretRoom 7.png

Notes[]

  • 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 Isaac can place a bomb. Secret Room entrances are never found in front of gaps, obstacles, or spikes. Each rooms adjacent 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.
  • 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. Added in Afterbirth †Dog Tooth Dog Tooth will play a howl sound effect when Isaac enters a room adjacent to a Secret Room or Super Secret Room, and Added in Afterbirth †YO LISTEN! YO LISTEN! will hover over Secret Room entrances.
  • Teleportation items can randomly teleport Isaac into Secret Rooms, and XVIII - The Moon XVIII - The Moon will always teleport Isaac to the Secret Room.
  • Secret Rooms are revealed on the map with Blue Map Blue Map, Book of Secrets Book of Secrets, Crystal Ball Crystal Ball, The Mind The Mind, Spelunker Hat Spelunker Hat, XIX - The Sun XIX - The Sun, or XXI - The World XXI - The World, but Isaac will still need to open their entrance.
  • Added in RepentanceRed Key Red Key can be used to find Secret Rooms. The lack of Red door frame means a Secret Room could have generated on the other side.
  • Added in RepentanceStar of Bethlehem Star of Bethlehem sometimes reveals Secret Rooms as it can travel through them.
  • If Greed Greed or Super Greed Super Greed spawn inside a Secret Room, Isaac won't be able to exit it (like a Mini-Boss Room Mini-Boss Room), but once the fight ends, all the exits of the Secret Room will be accessible.
    • An exception to this is that Challenge Room Challenge Rooms and Boss Challenge Room Boss Challenge Rooms will be inaccessible; the metal bars won't be removed from walls that lead to them after the fight concludes.
  • Secret Rooms can exist next to all types of rooms except Boss Room Boss Rooms, allowing certain restricted rooms to be entered.
    • Even if Isaac has 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 Room Curse Rooms without taking damage by bombing in from a Secret Room.
    • It is possible to access Challenge Room Challenge Rooms even if Isaac doesn'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.
  • Added in Repentance Secret Rooms of all types do not exist in the Ascent.
  • Added in Repentance Once Corrupted Data Corrupted Data is achieved (beating Delirium Delirium as Tainted Eden Tainted Eden), items that spawn Secret Rooms room have a chance to be randomized as if affected by TMTRAINER TMTRAINER.
  • 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 Boss Room takes the dead-end room that would require the most rooms walked through, and the Shop 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 that Isaac hasn't unlocked yet.

Trivia[]

  • In the original The Binding of Isaac, Secret Rooms worked differently; if the player left a room after opening a Secret Room entrance, the entrance would disappear. To access the room again for any purpose, the player needed another Bomb Bomb to reopen the entrance.
  • Prior to V1.7.5, Ultra Secret Rooms used the Angel Room Item Pool. This was meant as a placeholder.

Seeds[]

PC Normal mode only 927Q 481S (Secret Room above Treasure Room 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)

PC Added in Repentance Hard mode only 419H 1DQM (Take the Red Key Red Key in the Curse Room Curse Room left of the starting room, then use it on the right-hand wall of the Curse Room to reveal a Red Room Red Room which opens the Ultra Secret Room)

Bugs[]

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! Added in Afterbirth Teleporting to the Super Secret Room in Greed or Greedier Mode, when the room is generated behind a still-locked Treasure Room, can trap Isaac inside.
Bug Bug! Added in Repentance Certain secret rooms result in a crash (observed on seed Hard mode only THWM 9284, Dank Depths II)
Bug Bug! Added in Repentance If the Ultra Secret Room only connects to curse rooms, being teleported to it will result in no doors opening, resulting in a softlock. This likely happens because the game only tries to open doors that don't force you to go through the curse room, but since it's the only path, no doors open.

References[]


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