Sacrifice Room



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 brown chest or a golden chest. The chance is determined by the seed, meaning Isaac must damage himself on the spikes a set number of times for a chest.

The chances for the generation of either a Dice or Sacrifice Room: (1/7 (~14%) base chance, plus an independent 1/4 chance for a total of 5/14 (~36%) if Isaac’s total health is equal to or greater than his total Heart Containers) Has a 1/50 base chance to be a Dice Room, plus an independent 1/5 chance for a total of 27/125 (~22%) if Isaac has 2 or more keys; otherwise a Sacrifice Room is chosen.

Sacrifice Rooms were reworked, with a wide variety of possible rewards.

Rewards
The payouts only depend on the number of sacrifices made. The number of sacrifices is reset to 0 when the player goes to the next floor.

Notes on Rebirth Sacrifice Rooms (non-revamped)

 * Only one chest can be received per Sacrifice Room.
 * Taking damage down to half a red heart will always drop a chest. (Because ??? has no red health, 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 the.
 * Dying in a sacrifice room with the Missing Poster will reveal puzzle pieces used to unlock the.

Notes on Afterbirth Sacrifice Rooms (revamped)

 * If a player receives both of the "You feel blessed!" effects, they will stack for a 65% Angel Room Generation Chance.
 * The amount of health the player 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.
 * The player's Luck stat does not affect the payout probabilities.
 * If Uriel or Gabriel spawn, they can be despawned by exiting and reentering the room. However, they will not drop the Key Pieces unless defeated.
 * Angels drop nothing if the player already has their corresponding Key Piece.
 * Angels can normally fly over spikes, but they take damage from Sacrifice Room spikes.
 * Dying in a Sacrifice Room while holding Missing Poster will unlock (except during a Challenge or Victory Lap).
 * The Wafer, Cancer, and Percs reduce the spikes' damage to half a heart, allowing the player to make more sacrifices.
 * If using the  seed, the Dark Room teleport can escape the infinite Basement levels.
 * Even if The Negative isn't unlocked, the player can still teleport to the Dark Room.
 * This allows players to challenge The Lamb without facing Satan, Mom's Heart/It Lives, or even Mom.
 * Dying and respawning does not affect the number of sacrifices made, so can be used on low health in an attempt to acquire soul hearts.

Trivia

 * It is possible to use a Sacrifice Room to access the Dark Room while in Endless Mode. This can be used to start a Victory Lap while the  seed is active.
 * Because of the way Sacrifice rooms are generated, it is best to have less than 2 keys to prevent a Dice Room from replacing it and to have total health greater than or equal to your total heart containers when entering a new floor if you want to maximize your chances of generating a sacrifice room.