Binding of Isaac: Rebirth Wiki

(in Repentance)

Red Redemption is challenge #44. The goal is to defeat Boss Mother secondphase ingameMother. This challenge is unlocked by unlocking Character Tainted Jacob iconTainted Jacob.

Level generation in this challenge works very differently than normal. Tainted Jacob begins in a starting room without doors, and other rooms are generated in small clusters that are disconnected from each other and must be located by using the Collectible Red Key iconRed Key. Each floor generates like a Curse of the LabyrinthCurse of the Labyrinth floor with one ShopShop, two Boss RoomBoss Rooms, and two Treasure RoomTreasure Rooms, each connected to a group of normal rooms. Defeating either Boss will spawn a trapdoor that leads to the next chapter. Chapter 4, however, will not have special rooms other than the single Boss room where Mother resides. All rooms may be from any floor in the current chapter (for example, in Chapter 1, rooms may be from the BasementBasement, CellarCellar, Burning BasementBurning Basement, DownpourDownpour, or DrossDross). This applies to both pre-generated rooms and new rooms made using the Red Key.

The Collectible Red Key iconRed Key also works differently than normal. It starts in Jacob's consumable slot and can be used any number of times with no recharge. The Red Key can not be used to create a door to the I AM ERRORI AM ERROR room.

After using the Red Key 20 times on a single floor, Dark EsauDark Esau will spawn. The Red Key's charge bar displays how many uses it has left until this happens, rather than the item's actual charge. Another Dark Esau will spawn every 5 additional uses of the Red Key, as long as Jacob is not in his The Lost form. If he is, no more Dark Esaus will spawn.

Sacrifice RoomSacrifice Rooms will grant Tainted Jacob rewards as usual, but they will not teleport him to the Dark RoomDark Room.

Collectible Knife Piece 1 iconKnife Piece 1 and Collectible Knife Piece 2 iconKnife Piece 2 are not required to finish the challenge, however, Knife Piece 1 can still be encountered in an item room.

Strategy[ | ]

  • Try to avoid depleting Collectible Red Key iconRed Key's charge without covering a lot of ground. Each red room entered will be able to check the adjacent three rooms to see if they are normal rooms, so spacing apart paths of red rooms in straight lines, at least two rooms apart, will grant the most information per use of the key.
  • This challenge is like Blackjack, as it's preferable to visit as many rooms as possible, as they give you consumables or even extra items while making sure you don't go over the allotted amount of uses of the Red Key given per floor before Dark Esau spawns.
  • Most special rooms have at least one normal room next to them that are free to go into. Mapping abilities will show you the locations of either the special rooms or the clusters of rooms where they can be found, allowing you to minimize aimless wandering and potential Dark Esau encounters.
    • Collectible The Compass iconThe Compass, Collectible Crystal Ball iconCrystal Ball, and Collectible Treasure Map iconTreasure Map are the most useful items for this purpose, allowing an optimal route to be planned on every floor to visit as many rooms as possible to get more items and therefore a greater chance of winning.
    • Collectible Book of Secrets iconBook of Secrets is also useful to help find regular rooms, item rooms, shops, and boss rooms.
    • Collectible Sol iconSol acts like a weaker version of The Compass for the purposes of this run, as it reveals one boss room, and beating the boss will show the rest of the rooms on the floor.
    • Many cards can help reveal parts of the map, so items that increase the amount of cards found such as Collectible Deck of Cards iconDeck of Cards are useful. Obtaining XXI - The WorldXXI - The World or XIX - The SunXIX - The Sun will identify all rooms for a floor, while IV - The EmperorIV - The Emperor, IX - The HermitIX - The Hermit, and XVII - The StarsXVII - The Stars cards will locate a specific important room via teleportation, and Collectible Blank Card iconBlank Card will allow the reuse of these cards. Similar utility could be gained from Collectible Rune Bag iconRune Bag to obtain the Rune of AnsuzRune of Ansuz, but they will be considerably scarcer compared to cards.
    • It is very risky to take unidentified Pills during this challenge, as getting an Amnesia will make it much harder to find your way around.
  • Due to the fact that starting items in this challenge cannot be changed, rerolling your character through the use of the Collectible D4 iconD4, the Collectible D100 iconD100, or other means such as a Dice RoomDice Room is safe to do, unlike using the Collectible Clicker iconClicker
  • Any means of teleportation works surprisingly well in this challenge: random teleportation will NOT teleport you to any red room, including already opened ones. This will almost guarantee that you will teleport into either special rooms themselves (treasure, shop, boss, etc) or rooms adjacent to them, saving lots of red key charges in the progression. Collectible Teleport! iconTeleport! and Collectible Teleport 2.0 iconTeleport 2.0 both work, while Broken RemoteBroken Remote is the most efficient while in combination with certain active items that can be infinitely used (like Collectible Guppy's Paw iconGuppy's Paw).
  • If you are okay with Dark Esau chasing you, you can use it 5 more times before another one spawns, as well as an extra means of damage for the boss of the floor.
  • Do not transform into other characters during this challenge, as this will remove the Red Key and eventually make you unable to progress through floors.
  • Using Collectible Mama Mega! iconMama Mega! is a potential full clear of a floor, but is risky if Jacob has turned into his The Lost form, especially in CavesCaves, where mushroom explosions may kill you on the room instantly.
  • Crystal KeyCrystal Key is very useful in this challenge because it has a chance to open red rooms after a room is completed, saving Red Key uses.
  • If possible, try not to let Dark Esau spawn on the last floor, otherwise you'll have to fight Mother while he annoys you. Since Mother is a bullet hell boss, you'll have a hard time surviving.
  • Most types of special rooms can be encountered as red rooms, so if you are willing to explore (considering the risks it implies), you might find very useful stuff such as more Treasure RoomTreasure Rooms, ShopShops, etc.
  • If Collectible Anima Sola iconAnima Sola is used, the Red Key fully recharges, allowing infinite uses without having to worry about Dark Esau.
  • The familiar Collectible Lil Portal iconLil Portal proves itself to be very useful in this challenge, since making this familiar consume four pickups will make it spawn a portal to a random uncleared room of the main map, saving Red Key charges. These portals still persist at the same spot and will bring you to the same room, therefore also allowing quick travel after exploring the floor. When all main rooms of the floor are cleared, the familiar's next portals will simply throw you back out upon trying to enter them.
    • Note that the rooms which the portals take you to are determined upon their generation, so it is recommended that you clear every main room you can currently get to before creating the next one to bring you to a different part of the main map, in order to avoid creating unnecessary portals.

Notes[ | ]

  • Secret rooms of any type will not be generated in this challenge.
  • Unlike usual, The Boss RoomBoss Rooms might be connected to more than one non-red room.
  • Although you cannot get Angel RoomAngel Rooms or Devil RoomDevil Rooms from bosses, it's still possible to encounter them as red rooms.
  • Collectible Birthright iconBirthright will split all Dark EsauDark Esaus in two. However, it does not split Dark EsauDark Esaus that spawned prior to pickup.
  • Planetarium can be generated in this challenge.

Reward[ | ]

  • The Hermit
    The Hermit - Complete Red Redemption (challenge #44).

Trivia[ | ]

Bugs[ | ]

Bug Bug! Being revived by Missing PosterMissing Poster / Broken AnkhBroken Ankh or transformed into Collectible Esau Jr. iconEsau Jr. removes the Red Key and does not allow you to open new rooms, soft-locking you.
Bug Bug! Exiting and continuing a run while more than one Dark EsauDark Esau is present removes all but one. This can be repeated for every new Dark EsauDark Esau keeping the total count at one while enabling the player to continue using the Collectible Red Key iconRed Key.