Binding of Isaac: Rebirth Wiki
Binding of Isaac: Rebirth Wiki
(→‎Bugs: added two bugs relating to jacob & esau)
Tag: Visual edit
(→‎Character Interactions: added jacob & esau to the list of unique interactions.)
Tag: Visual edit
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* {{C|Tainted Eve}} will maintain control of all of her clots after death, but they will suffer the same damage penalty. If all of Tainted Eve's clots are dead, she will gain the Sumptorium as usual, allowing for a higher overall damage output.
 
* {{C|Tainted Eve}} will maintain control of all of her clots after death, but they will suffer the same damage penalty. If all of Tainted Eve's clots are dead, she will gain the Sumptorium as usual, allowing for a higher overall damage output.
 
* {{C|Tainted Azazel}} can still make use of his unique brimstone and sneeze abilities, but the damage penalty will still apply. The sneeze will also be smaller.
 
* {{C|Tainted Azazel}} can still make use of his unique brimstone and sneeze abilities, but the damage penalty will still apply. The sneeze will also be smaller.
  +
*[[Jacob and Esau]] will have 2 ghost babies after death, Esau's ghost baby arriving shortly after Jacob's
   
 
== Isaac ==
 
== Isaac ==

Revision as of 00:39, 15 May 2021

In the Repentance expansion, a brand new Co-Op mode was added. To access it, when a new run begins, as long as Player 1 does not leave the starting room, up to three additional players may press start. When they do, a small character selection menu will pop-up, and they will spawn in as the chosen character. To use the Co-Op baby mode, Player 1 must leave the starting room.

In Repentance Co-Op, sometimes referred to as True Co-Op mode, all players share the same resource pool of coins, bombs, and keys.

Changes

Certain changes are made to the game whenever multiple player characters are present. They are:

  • When a boss is defeated, only one item pedestal will spawn. Whenever a player takes an item from it, another will spawn until all players have taken an item.
  • Players who die will turn into small ghost babies (as if taking the item Pluto) upon death. These babies cannot fly, aggro enemies, or pick up items. They can still flip switches on the ground. They have a damage value of 0.50, though some babies can acquire more. When the floor boss is defeated, all dead players will respawn with half a heart depending on what character they are playing.

General Strategy

  • Because all coins, bombs, and keys are shared it usually doesn't matter which player takes them. Take note if one player has a trinket such as Bloody Penny Bloody Penny, since the trinket effect will only trigger for the player who takes the coin. Certain trinkets will activate their effect for all players.
  • Players must carefully consider what characters they use together. Some combinations will have inherent advantages, such as one player using Isaac Isaac and one player using ??? ??? meaning neither player will be competing for health drops. Other combinations could create more difficulties with each other like multiple players using ??? and being forced to compete for a rarer resource.
  • Because there is no way of knowing what item will pop up after the current one on the Boss Pedestal, take time to consider who needs the item most.
  • Only one item will spawn in any Treasure Room, meaning players will have to choose who gets any given item.
  • Try to stay close together, as any character who wanders past the edge of the screen in a large room will drag the camera with them, putting the other players off-screen and only giving a vague directional indicator for where they are.
  • Bombs or explosive items like Ipecac Ipecac or Dr. Fetus Dr. Fetus should be handled with extreme caution, as the explosions caused by these items will damage other players.
  • Curse Rooms can be used by changing which player uses the door, spreading the damage out.

Character Interactions

  • Azazel Azazel will keep his unique Brimstone as a ghost baby, though it will have the damage penalty.
  • Lilith Lilith will be able to use her Added in AfterbirthIncubus Incubus for the current room after dying, but for the rest of the floor her baby will be unable to shoot any tears.
  • Keeper Keeper will cause all Devil Deals to be paid for in pennies. This can be beneficial to some characters, but characters like Eve Eve who may want to get rid of heart containers may suffer. He will also maintain his inherent triple shot as a ghost baby.
  • Tainted Keeper Tainted Keeper will cause all items to require pennies before being picked up, incurring the same upsides and downsides as Keeper's Devil Deal effect. Any player who kills an enemy will cause them to drop a coin that vanishes after a few seconds. He will maintain his quadruple shot as a ghost baby.
  • Tainted ??? Tainted ??? will add his unique poop counter to the normal bomb counter as long as at least one player isn't playing as him. Regular bombs will be added back to the pickup pool, and any player may pick up poop drops to refill Tainted ???'s supply.
  • Tainted Jacob Tainted Jacob's Dark Esau will only affect him as long as he is the only Tainted Jacob in the match. After he dies, Dark Esau will continue to hunt down his ghost baby but will never kill him. Dark Esau's spawning animation will deal damage to all players regardless. If Tainted Jacob entered his The Lost form prior to dying, he will be revived at the boss that way. If Tainted Jacob is dead at the start of a floor, Dark Esau will still spawn, and will try to hunt down another player, but will be unable to kill them if they aren't also Tainted Jacob. In a match with multiple Tainted Jacobs, contact with any of the Dark Esaus will kill a Tainted Jacob, Added in RepentanceAnima Sola Anima Sola will only work on the Dark Esau that belongs to the Tainted Jacob using it, and the multiple Dark Esaus may choose to pursue the one living Tainted Jacob if the others are completely dead and turned into ghost babies.
  • Tainted Eve Tainted Eve will maintain control of all of her clots after death, but they will suffer the same damage penalty. If all of Tainted Eve's clots are dead, she will gain the Sumptorium as usual, allowing for a higher overall damage output.
  • Tainted Azazel Tainted Azazel can still make use of his unique brimstone and sneeze abilities, but the damage penalty will still apply. The sneeze will also be smaller.
  • Jacob and Esau will have 2 ghost babies after death, Esau's ghost baby arriving shortly after Jacob's

Isaac

Isaac Isaac generally works well with any character, due to his neutral stats and variable game plan. If The D6 The D6 start is unlocked, stacking multiple Isaac players can be effective to improve the general quality of items picked up, as each item can be rerolled more times, or multiple boss pedestal items can be rerolled before being picked up. Isaac's D6 can also be used in place of the Added in RepentanceEternal D6 Eternal D6 to remove the danger of deleting an item altogether.

Magdalene

Magdalene Magdalene can work as both a "healer" and a "tank" character. Her high vitality means that she can block bullets or enemies from other players to protect them, while her Yum Heart Yum Heart starting item will heal all other players for half a red heart. This pairs well with characters such as Samson Samson or his tainted counterpart, or Tainted Eve Tainted Eve, due to all of them having a need for disposable red hearts. All the same, it can be useless on characters such as ??? ??? or outright backfire if another player is using Eve Eve or possesses Added in Afterbirth †Dark Prince's Crown Dark Prince's Crown, meaning players who want to play Maggie in these situations may need a new active item.

Maggie suffers from a lack of speed, so items such as Caffeine Pill Caffeine Pill could be seen as a priority for her when deciding what players get what items.

Cain

Cain Cain has a generous array of benefits by default. His Paper Clip Paper Clip starting item, if unlocked, can massively improve the entire team's item economy, allowing other players to more freely use keys for rooms like the shop. His inherent Lucky Foot Lucky Foot also means he can take pills spawned by other players, or even the pill that Lazarus Lazarus starts with to force a neutral or good effect for himself.

His biggest weakness is a lack of range and the interactions caused by missing one eye, so items like Technology 2 Technology 2 should always be given to others, while reserving range increases like Mom's Heels Mom's Heels for him will show massive benefits.

Judas

Judas Judas provides a high damage output from early on, and won't be competing for an active item. However, his extremely low HP will put him at odds with a few characters, as he will either be taking multiple HP ups or trying to gather as many Soul or Black Hearts as possible, making him a poor companion to characters like Azazel Azazel or ??? ???.

Eve

Eve Eve can be somewhat of a high maintenance character to play with. Players that prioritize staying in her Whore of Babylon Whore of Babylon state will need to either get rid of heart containers, or avoid sources of health, both while collecting Soul or Black Hearts. If not, she will need more damage ups than usual to overcome her inherently lower damage multiplier to remain effective across floors. Despite these difficulties, Eve can pair well with Samson.

Samson

Samson Samson pairs well with any character that does not need to pick up red hearts, such as ???, Azazel, or Eve. Magdalene is also another easy choice thanks to her Yum Heart starting item allowing him to always take an extra hit to build up his Bloody Lust Bloody Lust bonus. If played well, Samson can get away with less damage ups than other characters in Co-Op, as long as his HP or Tear stats are given priority.

Azazel

Azazel Azazel's inherent flight and high damage makes him a strong choice to play with. Because players can decide whether or not he will be using red heart containers, he can be used with characters that have specific health demands such as Eve, ???, or Judas. His higher damage means that other characters should get the chance to pick up a damage increasing item first, as range is Azazel's main problem early on.

Lazarus

Lazarus Lazarus suffers mainly from his below average range and his bad luck stat. Other than that, he's a somewhat neutral character. If his Anemic Anemic start is unlocked, his range will be less of an issue, and he can play recklessly to use creep to damage enemies. Lazarus serves as somewhat of a "clutch" character, being able to revive immediately after dying while remaining in the room in his Lazarus Risen form and improving several of his stats including his damage multiplier.

Eden

Because Eden Eden has entirely random stats and items, there's no consistent strategy for playing with them, since each run needs to be adapted to their needs during that specific attempt. The best overall strategy for playing with Eden is bringing a much more consistent, stable character such as Isaac that does not need incredible maintenance or has some flexibility to allow for Eden's mutations safely.

The Lost

If The Lost The Lost has their Holy Mantle start unlocked, they can be a surprisingly good partner for Co-Op. Since The Lost does not need to take any on-hit items or HP ups, they immediately become compatible with many different characters like Judas, Samson, Eve, or even ???, though these runs pose an obvious risk early on. However, playing with The Lost also makes items such as Ipecac Ipecac extremely dangerous to take due to the risk of friendly fire. Because of the ability for Dark Esau to deal damage to all players when he spawns, and the overlap in Devil Deal uses, The Lost pairs very poorly with Tainted Jacob Tainted Jacob.

Bugs

Bug Bug! When one player is using Tainted Cain and takes a boss item pedestal, all items that aren't claimed will be taken immediately.
Bug Bug! If Tainted Jacob is revived in his The Lost form and killed before the next floor starts, his ghost baby will be a floating Isaac head and turn into a floating Isaac torso when moving. This is purely cosmetic.
Bug Bug! When an active item is on a boss pedestal and a player that already has an active item picks it up, any item underneath will despawn and only the replaced active item will be on the pedestal.
Bug Bug! if Jacob & Esau is the last person to die in a co-op game, the game will not end and will instead softlock with neither of you able to leave the room.
Bug Bug! if multiple people are playing as Jacob & Esau, Esau's health will only be shown for the first player to join the game.