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(except in Repentance)Double Locked Room (in Repentance)Dice Room door lockedDice Room door

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

Effects[ | ]

Dice room example

In addition to whatever else the room holds, there will always be a symbol of one of the sides of a six-sided die in the 5x5 center of the room. The amount of pips shown will be between one to six, chosen randomly. When Isaac crosses the die, 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 die numbers and effects are:

  • ⚀ 1 pip - Rerolls Isaac's currently held collectibles into items from the Treasure Room item pool, like the Collectible D4 iconD4 would. Activated collectibles can be changed into passive ones, but passive collectibles cannot turn into activated ones.
    • (in Afterbirth † and Repentance) Rerolls each of Isaac's passive items into a random item from the pool of the room where it was acquired.
    • (in Repentance) Rerolls both Isaac's active and passive items.
    • (in Repentance) Only rerolls the items of the character that stepped onto the dice in co-op.
      • Meaning that Character Tainted Forgotten iconTainted Forgotten has to be thrown on the button in order to take effect.
  • ⚁ 2 pips - Rerolls all pickups in the room, like the Collectible D20 iconD20 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 RoomDevil Room, Angel RoomAngel Room, Black MarketBlack Market, or Crawl SpaceCrawl 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 Collectible The D6 iconThe D6 would. Does not reroll item pedestals in the Devil RoomDevil Room, Angel RoomAngel Room, LibraryLibrary, Black MarketBlack Market, or Crawl SpaceCrawl Space.
    • (in Afterbirth † and Repentance) 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 Collectible Forget Me Now iconForget Me Now.
  • ⚅ 6 pips - Combines the effects of the 1-, 3-, and 4-pip rooms. (Rerolls all held items (including active), pickups, trinkets, and pedestal items like the Collectible D100 iconD100.)
    • (in Repentance) Rerolls all held items for all characters in co-op.

Layouts[ | ]

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.


Notes[ | ]

  • Collectible Dad's Key iconDad's Key, (except in Rebirth)Get out of Jail Free CardGet out of Jail Free Card, and (in Afterbirth † and Repentance)Collectible Mr. ME! iconMr. 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 VaultVault, 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 WombWomb/UteroUtero II can allow the player to defeat Boss Mom's Heart ingameMom's Heart (or Boss It Lives ingameIt 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 Character Samson iconSamson by finishing the first floor and using a 5-pip Dice Room.
  • It is possible to unlock Character Magdalene iconMagdalene or Character Cain iconCain In the 1-pip or 6-pip dice room, if Isaac's new items bring his heart containers containers to 7, or his coins to 55, respectively.
  • 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 Collectible The D6 iconThe 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.
  • (except in Rebirth) Dice Rooms don't re-roll starter challenge items or remove blindfold on challenges.
  • (in Afterbirth † and Repentance) 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.
  • (in Repentance) If Jacob and Esau activate a 6-pip room, the items held by both characters will be rerolled, but only the items of the character that step on a 1-pip room will be rerolled.
  • (in Repentance) Any rooms generated by Collectible Red Key iconRed Key that contain an item pedestal will not be affected by a 4-pip room.
  • (in Repentance) In the Mirrored World, the second Dice Room may be different.
  • If Tainted Lazarus activates a 1-pip room, only the state that activated the room will have the items rerolled, leaving the other form's items untouched.

Gallery[ | ]

Bugs[ | ]

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 (except in Rebirth)Collectible Mom's Box iconMom's Box passive of doubling trinkets but you keep the speed boost from Collectible A Pony iconA Pony.


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