Devil Room
Devil Rooms primarily allow Isaac to make Deals with the Devil, but they can also contain a variety of enemies, pickups, or even a boss battle against
Krampus. A Devil Room has a chance to appear in a
Boss Room after the boss occupying it has been defeated. If certain criteria are met, a Devil Room can be replaced by an
Angel Room.
In Greed Mode, Devil Rooms are guaranteed to appear upon completing the optional 11th wave of a floor
Optional 12th wave for Greedier Mode.
Possible Contents
- 1-3 Deals with the Devil
- 3
Red Chests
- 2
Black Hearts
-
Krampus
1 Angel Statue
2 Deals with the Devil and 1
Devil Beggar
4 Deals with the Devil
5 Red Chests
3 Devil Beggars
2 Deals with the Devil and 1
Black Sack
2 Runes
Additionally, 2 Red Fire Places may spawn,
as well as Urns. Spikes may spawn instead of or in addition to any items/pickups.
Some regular enemies can appear as well, including:
1
Mom's Hand, 2
Nulls, 1
Imp, or
1
Mom's Dead Hand.
If Isaac is holding
Number Magnet: 2
Begottens, 3 Nulls, 2 Imps, 1
Evil Twin, 1
Black Maw, 3
Black Globin's Heads, 3
Wizoobs, 4
Soul Suckers, or 1
Bloodshot Eye may spawn.
If a Devil Room appears upon defeating Mom's Heart
or
It Lives!, it will only contain a trapdoor to
Sheol.
Deals with the Devil
A Devil Room has a high chance of spawning items that will be put up for sale. Unlike Shops, where Isaac pays with money, to make Deals with the Devil Isaac has to trade Red Heart Containers as payment. All items normally cost either 1 or 2 Red Heart Containers, and their prices roughly correspond to their power.
When playing as
Keeper, the character's coin heart containers are used to trade for Devil Deal items, with items costing the same number of coin heart containers as red heart containers with a different character.
Instead of coin heart containers, Devil Deal items must be bought using coins. One-heart and two-heart deals cost 15 and 30 cents, respectively. Paying cents for Devil Deals will still remove the Angel room appearance chance in the same way when other characters pay with heart containers.
- The same cost for deals are applied with any character who collected
A Pound of Flesh.
- The same cost for deals are applied with any character who collected
See the following item pool for a comprehensive list of items offered and their health price: Devil Room (Item Pool)
Notes
- If Isaac does not have Red Heart Containers upon entering a Devil Room, all items will cost 3
Soul Hearts.
If Isaac is presented with 2+ items to buy, but only has enough Red Hearts to buy one, the price of the other(s) will change to 3 Soul Hearts upon spending your Red Hearts.
Additionally, if Isaac only has one Red Heart, deals that normally cost 2 Hearts will change to one Red Heart and two Soul Hearts.
- If Isaac does not have enough Soul Hearts for this type, he will still be able to take the Deal. However, if Isaac has no health at all (e. g. he is defying death with
Berserk!), he will not be able to take the Deals.
- If Isaac does not have enough Soul Hearts for this type, he will still be able to take the Deal. However, if Isaac has no health at all (e. g. he is defying death with
If Isaac has less than 3 Soul Hearts, but at least one
Bone Heart, he can take a three-Soul-Heart Deal and stay alive because of the bone hearts.
- Two-heart deals can be taken even if Isaac does not have enough Red Hearts to afford them, as long as he has one Red Heart to spend.
- Spending all of his Heart Containers will not kill Isaac as long as he has
Soul Hearts,
Black Hearts, or
Bone Hearts remaining.
- If taking a Deal leaves Isaac with no health remaining, he can still survive if he picks up a Soul Heart, Black Heart, or Bone Heart while holding the item in the air. Also, if he has an active item that grants Soul/Black Hearts, he can take a Deal and then use the active item, leaving him alive with whatever the item gave him.[1] The same is true for consumables that give hearts (e. g.
Dagaz).
If Isaac takes a Deal for an item that grants an
Eternal Heart through the use of
Chaos, it will not keep him alive.
- If taking a Deal leaves Isaac with no health remaining, he can still survive if he picks up a Soul Heart, Black Heart, or Bone Heart while holding the item in the air. Also, if he has an active item that grants Soul/Black Hearts, he can take a Deal and then use the active item, leaving him alive with whatever the item gave him.[1] The same is true for consumables that give hearts (e. g.
The temporary heart container granted by
XI - Strength cannot be used to purchase a devil deal. However, if Isaac has no other heart containers to spend, then it can be used this way. This also works if the devil deal costs 2 hearts, but Isaac only has 1 before activating the Strength card.
III - The Empress? also worked this way in early versions of Repentance.
As of V1.7.9b, temporary heart containers can be used for devil deals with no restrictions.
Some items may cost Soul Hearts even if Isaac still has Red Hearts.
- An item's price may change from Red Hearts to Soul Hearts if Isaac visits the Devil Room before obtaining enough Soul Hearts and returning to the Devil Room.
Angel Rooms
- Refusing to make Deals with the Devil will give Isaac the chance of an
Angel Room replacing the
Devil Room on subsequent floors. If any Deal with the Devil is taken, Angel Rooms will not spawn for the remainder of the run.
Trading Heart Containers for items in a
Black Market counts as taking a Deal with the Devil for
Angel Room generation purposes.
- Only the act of paying health (Red Hearts or Soul Hearts) for an item in a Devil Room counts as a Deal with the Devil. Taking
Black Hearts, opening
Red Chests, and taking items that weren't paid for (such as those obtained from
Red Chests,
Krampus,
Beggars,
Pandora's Box, or made free by using
Credit Card) do not count as Deals taken, allowing Isaac to still see Angel Rooms.
If the first offered Devil Room is not entered at all, the next offer is guaranteed to be an Angel Room. If the player uses the
Joker it will take you to the Angel Room without removing the guarantee.
Conditions to Make Devil Rooms Appear
A Devil Room can only open on floors between the second floor of Chapter 1 and Chapter 4.
There is only a 1% base chance for the Devil Room door to open. This chance can be modified in various ways:
Condition | Chance |
---|---|
![]() ![]() |
+6.9% |
Blowing up at least one ![]() |
+10% |
Having ![]() |
![]() ![]() |
Having a second ![]() |
![]() ![]() |
Having ![]() |
![]() ![]() |
Holding ![]() |
![]() ![]() |
Blowing up at least one ![]() ![]() ![]() ![]() ![]() |
+35% |
Taking no Red Heart damage against the boss | +35% |
Taking no Red Heart damage for the entire floor | +99% |
![]() ![]() |
+40% |
![]() ![]() ![]() |
+15% |
![]() ![]() |
+10%, up to +80% |
Holding ![]() |
![]() ![]() |
Having ![]() |
Guaranteed |
![]() ![]() |
Guaranteed (always Angel Room) |
Previous Devil Room door seen two floors ago | x0.5 |
Previous Devil Room door seen less than two floors ago | x0.25 |
For example, if Isaac has avoided taking Red Heart damage and has blown up a Shopkeeper, he will have a (1+35+99+10)% = 145% base Deal with the Devil chance which will be displayed 100%, which will then go down to 36.25% once he sees the Devil Room.
Notes
- If the player enters a Devil Room without the entrance door appearing (by teleporting in), the chance to receive a Devil Room will not be reduced. Because of this, if a Devil Room is seen this way and the player does not want to enter it again, intentionally taking red heart damage will reduce the chance of seeing it after the boss fight, which can prevent the penalty from seeing the Devil Room door from applying to the next floor.
- The chance that the Devil Room or Angel Room door will remain open after re-entering the Boss Room is based on the current Deal with the Devil chance, which gains the x0.25 multiplier from seeing the Devil Room door less than two floors ago. Due to its high chance of disappearing, it is recommended to go directly into the Devil Room when offered,
unless it's the first time one is seen and the player wants to get a guaranteed Angel deal.
- On XL floors, the Devil Room door can only appear after completing the second Boss Room.
- On XL floors, not seeing a Devil Room will count as not seeing a Devil Room for two floors, and seeing it will count as not seeing a Devil Room for one floor.
- Taking
Soul Heart,
Black Heart,
Eternal Heart,
Bone Heart, or
Rotten Heart damage does not decrease the chance to open a Devil Room; only
Red Hearts count.
- Taking red heart damage from a
Devil Beggar,
Blood Donation Machine,
IV Bag,
Blood Rights,
Razor Blade,
Shard of Glass or
Sharp Plug does not decrease the chance to open a Devil Room.
Sacrifice Rooms also count as self-damage and do not lower the Devil Room chance.
The Bad Trip pill effect or damage from
Curse Room doors still counts as Red Heart damage.
Losing a Bone Heart container as
The Forgotten counts as Red Heart damage.
This includes losing a Bone Heart through self-damage.
Tainted Magdalene's leaking Red Hearts being damaged does not count as Red Heart damage, regardless of the damage source.
- Taking red heart damage from a
- Killing
Devil Beggars,
Shell Game Beggars, or
Key Masters does not increase the chance of opening the Devil Room.
- There are additional ways to enter a Devil Room on any floor:
-
Red Chests have a chance of teleporting Isaac into the Devil Room upon being opened.
- Using
Joker will teleport Isaac into the room.
Using
Teleport 2.0 after all other rooms on the floor (excluding the
I AM ERROR room) have been visited.
-
Teleport!,
Undefined, and Telepills cannot transport Isaac to the Devil Room.
If a deal would deal lethal damage to
The Soul, quickly switching to
The Forgotten will keep him alive. This can even be done to take 3-heart deals for one soul heart.
- If The Soul has no Hearts, switching to The Soul is disabled until another Soul or Black Heart is acquired.
- The same can be done "in reverse" - take a deal as The Forgotten and quickly switch to The Soul. However, this will usually cause a softlock unless
Birthright is obtained since switching to The Forgotten will be disabled while he has no Hearts, and The Soul is chained to The Forgotten and thus is incapable of traversing rooms.
The Lost can take all Deals with the Devil for free.
The Lost,
Tainted Lost, and
Tainted Jacob in ghost form are allowed to take one of the offered Deals for free; the others will vanish afterward.
- The same applies to any character turned into ghost form via
Soul of the Lost or by touching a
White Fire Place.
- The same applies to any character turned into ghost form via
??? pays for Devil Deals with Soul Hearts for prices equal to their Red heart equivalent; ie, one or two Soul Hearts depending on the item, rather than the normal three. No other character has this effect, including
Tainted ???.
The rock behind the Devil can rarely be a Tinted Rock.
An Angel statue can rarely substitute the Satan statue and can be awoken with an explosion as usual.
- Angels spawned in this way do not drop Key Pieces, however.
- The highest possible Devil Room chance without Goat Head is 204% in Afterbirth, or 326.9% in Repentance.
It is possible to have a guaranteed Deal Chance without Goat Head or Eucharist if enough
Satanic Bible wisps are produced and all chance-increasing effects take place. However, this is extremely difficult to achieve since only up to 8 Satanic Bible wisps can exist simultaneously (certain items such as
Jar of Wisps ignore this).
- Teleporting into a deal without beating the floor boss can generate a different deal than the one you'd receive after beating it. This can be observed by having a
Red Chest teleport or using a
Joker while holding on to a
Glowing Hourglass, using it to undo the teleport and then accessing the deal after defeating the floor boss, even if the deal door does not open by itself.
- This can be observed even in the starting floor of the game. It however no longer happens after Womb 2.
- Once a deal has been generated in any manner, it can not be changed or influenced.
- For example collecting
Eucharist after a Devil Deal door had opened, will not result into changing the current floor deal to an Angel Deal even if the Devil Deal was not visited.
- For example collecting
- It is possible to "undo" a deal door opening after beating the floor boss with
Glowing Hourglass (provided the natural chance for the deal was not 100%) by entering the deal door and using the hourglass inside the room. If that happens, the game considers the current deal as not having opened at all, and will not apply a deal chance penalty for the next floor. This can be useful if the deal did not offer anything the player wanted.
- This can be repeated as many times as necessary until the door closes by itself, and as long as Isaac directly visits the deal and does not leave it himself but only by using the hourglass.
Gallery
Unlockable Achievements
- Azazel - Make 3 Deals with the Devil in one run.
- Krampus - Take 20 items from Devil Rooms.
Trivia
- In the original The Binding of Isaac, the Devil Rooms were somewhat less forgiving; if Isaac had an Eternal Heart, taking a Devil Deal would remove it.
- Furthermore, if Isaac has at least one Soul Heart and one Red Heart Container, and he takes a Devil Deal, Isaac would die. Isaac's last will will show a pentagram or a goat head as a result.
- Purchasing something worth two Red Heart Containers with one Red Heart Container and at least one Soul Heart will also remove the Soul Heart. Strangely, this will not kill Isaac, but the next hit he takes will, similar to
The Lost.
References
![]() ![]() | ||||||
---|---|---|---|---|---|---|
Unlocked | ![]() Boss Room |
![]() Mini-Boss Room |
![]() Curse Room |
![]() Sacrifice Room |
![]() ![]() Closet |
![]() ![]() Grave Room |
Locked | ![]() Treasure Room |
![]() Shop |
![]() Library |
![]() ![]() Planetarium |
||
Slotted | ![]() Arcade |
|||||
Barred | ![]() Challenge Room |
![]() Boss Challenge Room |
||||
Double-locked | ![]() Vault |
![]() Dice Room |
||||
Double-boarded | ![]() ![]() Clean/Dirty Bedroom |
|||||
Hidden | ![]() Secret Room |
![]() Super Secret Room |
![]() Crawl Space |
![]() Black Market |
![]() I AM ERROR |
![]() ![]() Ultra Secret Room |
Post-boss | ![]() Devil Room |
![]() Angel Room |
![]() Boss Rush |
![]() ![]() Blue Womb Entrance |
![]() ![]() |
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