Sacrifice Rooms are special rooms that contain a set of spikes in their center.
Isaac can damage himself on the spikes for a chance to spawn a
Chest or a
Locked Chest. The chance is determined by the seed, meaning Isaac must damage himself on the spikes a set number of times for a Chest to spawn.
Sacrifice Rooms were reworked, with a wide variety of possible rewards (shown below).
The base chance of a Sacrifice Room being generated is 1/7 (~14%). If Isaac's total health is equal to or greater than his total red heart containers, an additional 1/4 chance applies for a total of 5/14 (~36%).
Sacrifice Rooms are mutually exclusive with Dice Rooms. If a Sacrifice Room is to be generated, it has a 1/50 base chance to be replaced by a Dice Room, plus an additional 1/5 chance for a total of 27/125 (~22%) if Isaac has 2 or more keys.
Contents
Rewards
[]
The payouts only depend on the number of sacrifices made. The number of sacrifices is reset to 0 when Isaac goes to the next floor.
№ of sacrifices on Current Floor | Chance | Reward |
---|---|---|
1st / 2nd | 50% | Nothing |
50% | 1 Penny | |
100% ![]() |
1 Bomb (Only if the first floor boss has been defeated in less than one minute and Isaac has no bombs, to help obtain ![]() | |
3rd | 33% | Nothing |
67% | "You feel blessed!" (increased chance to receive an Angel Room over a Devil Room for the current floor)
| |
4th | 50% | Nothing |
50% | 1 random ![]() | |
5th | 33% | 3 ![]() |
67% | "You feel blessed!" (Same conditions as 3rd sacrifice but providing a stronger modifier.) | |
6th | 33% | Teleport to the Devil/Angel Room. (If the floor's Devil/Angel Room has not been spawned yet, an Angel Room is guaranteed to spawn — even if a Devil Deal has already been taken.) |
67% | 1 random ![]() | |
7th | 33% | 1 random Angel Room item. ![]() ![]() ![]() ![]() |
67% | 1 ![]() | |
8th | 100% | ![]() ![]() ![]() |
9th | 100% | ![]() |
10th | 50% | 7 ![]() |
50% | 30 ![]() | |
11th | 100% | ![]() |
12th and onwards | 50% | Nothing |
50% | Teleport directly to the ![]() |
Layouts[]
Notes[]
- The sacrifice rewards are determined ahead of time, not when Isaac steps on the spikes.
- Received items/trinkets can be changed, however. If Isaac checks the items and resets (such as with the
Glowing Hour Glass), he can find that item on the same floor, then redo the sacrifice to force a different item to spawn.
- Resetting will reset Isaac's number of sacrifices to what it was prior to his reset unless stated otherwise.
- Received items/trinkets can be changed, however. If Isaac checks the items and resets (such as with the
- Spikes in a
Sacrifice Room will deal damage even when flown over, so Isaac can use them even with Flight.
- Isaac must take damage on the spikes for the rewards to pay out. Invulnerability, shields, and effects that block damage (
Holy Mantle,
Wooden Cross, etc.) will not trigger a sacrifice.
The
Callus prevents the Sacrifice Room from functioning.
- Sacrifice Rooms do not naturally appear in the
Chest,
Dark Room, or
The Void.
Sacrifice Rooms won't teleport Isaac to the
Dark Room during a challenge or daily challenge that does not end there, thus nothing will happen from the 12th sacrifice onward.
If more than one Sacrifice Room is created on one floor with
Red Key or equivalent effects, each Sacrifice Room has its own sacrifice counter. For example, doing 3 sacrifices in one room, then 3 in another gives Isaac the 1st to 3rd effects from both rooms, instead of 1st to 3rd, then 4th to 6th. Additionally, performing more sacrifices in the first room again will count up from 4th; the count is not reset by using another room.
Sacrifice Rooms generated by using
Red Key in the
Dark Room will, when used enough times, teleport Isaac to a new instance of the Dark Room. This effectively generates a new floor.
Entering a Sacrifice Room while holding
Flat File will cause the spikes to be retracted into the ground. Dropping the trinket and re-entering the room will cause the spikes to reappear.
Notes on Rebirth Sacrifice Rooms[]
- Only one chest can be received per Sacrifice Room.
- Taking damage down to half a red heart will always drop a chest. (Because
??? cannot have Red Heart containers, dropping down to half a heart does not guarantee a drop.)
- Dying on the spikes guarantees a chest, which can be useful if Isaac is low on health and has more lives from something like
Dead Cat.
- Dying in a Sacrifice Room with the
Missing Poster will reveal puzzle pieces used to unlock the
The Lost.
Notes on Afterbirth Sacrifice Rooms[]
- If Isaac receives both of the "You feel blessed!" effects, they will stack for a 65% Angel Room generation chance.
- The amount of health Isaac has left after taking a sacrifice does not affect the payout probabilities.
Losing red hearts due to the spikes will reduce the chance for a
Devil Room to appear.
- Isaac's Luck stat does not affect the payout probabilities.
- If
Uriel or
Gabriel spawn, they can be despawned by exiting the room.
- While
Uriel and
Gabriel can normally fly over spikes without taking damage, they will take damage from Sacrifice Room spikes.
- Dying in a Sacrifice Room while holding
Missing Poster will unlock
The Lost (except during a Challenge or Victory Lap).
The Wafer,
Cancer, and the Percs pill reduce the spikes' damage to half a heart, allowing Isaac to make more sacrifices.
- If using the
BASE MENT
seed, theDark Room teleport can escape the infinite
Basement floors.
- Even if
The Negative isn't unlocked, Isaac can still teleport to the
Dark Room.
- This allows Isaac to challenge
The Lamb without facing
Satan,
Mom's Heart/
It Lives, or even
Mom.
- This allows Isaac to challenge
- Dying and respawning does not reset the number of sacrifices made, so
Dead Cat can be used on low health in an attempt to acquire soul hearts.
Unlockable Achievements[]
Bugs[]
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Unlocked | ![]() Boss Room |
![]() Mini-Boss Room |
![]() Curse Room |
![]() Sacrifice Room |
![]() ![]() Closet |
![]() ![]() Grave Room |
Locked | ![]() Treasure Room |
![]() Shop |
![]() Library |
![]() ![]() Planetarium |
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Slotted | ![]() Arcade |
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Barred | ![]() Challenge Room |
![]() Boss Challenge Room |
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Double-locked | ![]() Vault |
![]() Dice Room |
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Double-boarded | ![]() ![]() Clean/Dirty Bedroom |
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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 |