Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki

Removed in RepentanceDouble Locked Room.png Added in RepentanceDice Room door locked.pngDice Room door.png

Dice Rooms are special rooms that can randomize many elements of the run. Dice Rooms require two keys to be opened, unlike most other special rooms. For a Dice Room to spawn, two things must happen;


Dice room example.png

In addition to whatever else the room holds, there will always be a symbol of one of the sides of a die in the 5x5 center of the room. The amount of pips shown will be between one to six, chosen randomly. When Isaac steps on it, a certain effect will occur that randomizes a certain aspect of the run, dependent on how many pips were on the die face shown. Any given Dice Room can only give this effect once.

The dice numbers and effects are:

  • ⚀ 1 pip - Rerolls Isaac's currently held collectibles into items from the Treasure Room item pool, like the 15►D4 D4 would. Activated collectibles can be changed into passive ones, but passive collectibles cannot turn into activated ones.
    • Added in Afterbirth † Rerolls each of Isaac's passive items into a random item from the pool of the room where it was acquired.
    • Added in Repentance Only rerolls the items of the character that stepped onto the dice in co-op.
      • Meaning that Tainted Forgotten Tainted Forgotten has to be thrown on the button in order to take effect.
  • ⚁ 2 pips - Rerolls all pickups in the room, like the 15►D20 D20 would.
  • ⚂ 3 pips - Rerolls all pickups and trinkets on the entire floor. This includes shop pickups. Does not reroll pickups or trinkets in the Devil Room, Angel Room, Black Market, or Crawl Space.
    • Pickups rerolled in shops by this effect have a chance to turn into items. If these are active items, they will have no charges when picked up.
  • ⚃ 4 pips - Rerolls any item pedestals on the floor, like 15►The D6 The D6 would. Does not reroll item pedestals in the Devil Room, Angel Room, Shop, Library, Black Market, or Crawl Space.
    • Added in Afterbirth † Item pedestals located in the Shop and the Library are rerolled.
  • ⚄ 5 pips - Rerolls and restarts the current floor, which is the same effect as 15►Forget Me Now Forget Me Now.
  • ⚅ 6 pips - Combines the effects of the 1-, 3-, and 4-pip rooms. (Rerolls all held items, pickups, trinkets, and pedestal items like the 15►D100 D100.)
    • Added in RepentanceRerolls all held items for all characters in co-op.


The following room maps were made using Basement Renovator for cleaner viewing. Note that any pickups in the 5×5 center of the room will be on the die symbol, requiring Isaac to activate the room in order to obtain them unless he knocks them away with explosions of some kind. Given how hazardous some dice room effects can be, this may be the preferred way of retrieving them.


  • 15►Dad's Key Dad's Key, Added in AfterbirthGet out of Jail Free Card Get out of Jail Free Card, and Added in Afterbirth †15►Mr. ME! Mr. ME! open Dice Rooms in one use, despite the fact that they require two keys.
  • Due to how Dice Room generation works, a floor cannot have both a Dice Room and Sacrifice Room; they are mutually exclusive.
  • If a floor has two special rooms that require two keys to enter, the one closer to the start room will be a Vault, and the one further away from it will be a Dice Room.
  • It is possible to re-roll a floor into another that has a 5-pip Dice Room. Getting a 5-pip dice room in Womb Womb/Utero Utero II can allow the player to defeat Mom's Heart (or It Lives) multiple times in one run. This can be used to quickly gain progress tied to the number of Mom's Heart kills.
  • It is possible to unlock Samson Samson by finishing the first floor and using a 5-pip Dice Room.
  • A 5-pip dice room on an XL floor sends Isaac to the first floor of the chapter.
  • When shop pickups are re-rolled via a 3- or 6-pip room, the original prices will remain in place.
  • 3- or 6-pip Dice Rooms can reroll chests in Challenge Rooms or Boss Challenge Rooms into collectables. And since those rooms detect whether a chest is open or an item picked up, there won't be any monsters.
    • Using items such as 15►The D6 The D6 in the room without buying the item can cause the item to revert to a consumable.
  • There is a small chance that 1- and 6-pip rooms will not reroll every item Isaac has in his possession.
  • Added in Afterbirth Dice Rooms don't re-roll starter challenge items or remove blindfold on challenges.
  • Added in Afterbirth † Dice Rooms have a small marker indicating the effect that will be activated when the room is used. This was inspired by this Steam Workshop mod by Wofsauge.
  • Added in RepentanceIf Jacob and Esau activate a 1- or 6-pip room, the items held by both characters will be rerolled.
  • Added in RepentanceAny rooms generated by Added in Repentance15►Red Key Red Key that contain an item pedestal will not be affected by a 4-pip room.
  • Added in RepentanceIn the Mirrored World, the second Dice Room may be different.



PC 8ZCP Y8KK (1-pip room, Necropolis I, far northeast room. Good late game randomizer.)

PC R4V7 603Q (2-pip room on Necropolis II)

PC 8Q88 CP4J (3-pip room on third floor)

PC Q3TZ WQLG (Three 5-pip rooms. Two on the second floor, one in Utero 2. If played with The D6, can become Lord of the Flies and Guppy. Very good run.)

PC KTEJ KLPP (5-pip room adjacent to spawn)

PC HA1A P0SF (6-pip room on second floor)


Bug Bug! The 1-pip room may reroll your active item into a "passive" item. The 1-pip room always empties your active item slot. However 1-pip room may fail to find a replacement item which results in Isaac still having the collectible. This is because the D4 will try 3 times to get a non-active item from the item pool before giving up replacing the item.
Bug Bug! The 1-pip room will reroll your secondary active collectible without emptying the slot. This means you will keep the active ability but lose some passive abilities. For example, you will lose Added in Afterbirth15►Mom's Box Mom's Box passive of doubling trinkets but you keep the speed boost from 15►A Pony A Pony.

SmallIsaac.png Rooms SmallIsaac.png

Unlocked Added in Afterbirth Added in Afterbirth †
Boss Room Icon.png
Boss Room
Mini-Boss Room Icon.png
Mini-Boss Room
Curse Room Icon.png
Curse Room
Sacrifice Room Icon.png
Sacrifice Room
Room 1x1 small.png
Room 1x1.png
Grave Room
Locked Added in Repentance
Treasure Room Icon.png
Treasure Room
Shop Icon.png
Library Icon.png
Planetarium Icon.png
Slotted Arcade Icon.png
Barred Challenge Room Icon.png
Challenge Room
Boss Challenge Room Icon.png
Boss Challenge Room
Double-locked Vault Icon.png
Dice Room Icon.png
Dice Room
Double-boarded Bedroom Icon.png Bedroom2 Icon.png
Hidden Added in Repentance
Secret Room Icon.png
Secret Room
Super Secret Room Icon.png
Super Secret Room
Super Secret Room Icon.png
Crawl Space
Super Secret Room Icon.png
Black Market
Super Secret Room Icon.png
Ultra Secret Room Icon.png
Ultra Secret Room
Post-boss Added in Afterbirth
Devil Room Icon.png
Devil Room
Angel Room Icon.png
Angel Room
Super Secret Room Icon.png
Boss Rush
Super Secret Room Icon.png
Blue Womb Entrance
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