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This article contains info on upcoming content. This information was obtained from teasers or unreleased demos and is not representative of the final product. This article will need to be checked for quality and updated once it is released.
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This article is incomplete. Please help to improve it, or discuss the issue on the talk page.
Issues: As this is information relating to unreleased content, there may be more information planned to be released by the developers in the following months. |
The following information/confirmations of The Binding of Isaac: Repentance, an upcoming DLC set to be released in 2019, has been collected:
August
August 30th (Reveal)
A "title reveal" for a new expansion was released by Nicalis on Youtube.
The trailer revealed the title of the expansion and its logo - strikingly similar to that of The Binding of Isaac: Antibirth, a fan-made expansion of the game that received critical acclaim from the community but despite popular demand seemed to have little chance of being brought to the official game. Additionally, it was announced on Twitter that Repentance would be available for play at the PAX West 2018 Convention.
August 31st
The demo version of Repentance playable at PAX confirmed suspicions that the expansion would indeed be a port of Antibirth. Original content from the mod that led to this conclusion as well as brand new content in Repentance that were discovered in the demo included:
- The "Downpour" floor from Antibirth, as well as a brand new sewer-themed floor "Dross" (assumed to be an alternate floor of Downpour)
- New items, such as:
- Giant Cell
- Vade Retro
- Spin to Win
- Tropicamide
- Vasculitis
- Returning Items from Antibirth:
- New enemies:
- A Dross variant of Squirt
- A green fly (later seen in Kil's gameplay footage).
- A Downpour variant of Pacer that has a chance to be spawned from Blurbs upon death.
- New bosses:
- A new boss in the "Dross" floor (Name Later To Be Confirmed As Clog)
- As well as recurring enemies and bosses from Antibirth:
- Blurb, revealed in this image.
- Bubbles
- Wraith
- Prey
- Small Leech
- Willo
- Tidal Gaper
- Polty (Confirmed by images in a Google Drive in this Reddit post)
- Returning Bosses
- Baby Plum, as revealed in this tweet by a PAX player.
- Wormwood
- Lil Bub (Originally named Beelzeblub in Antibirth)
- Returning Obstacles from Antibirth:
September
September 1st
Edmund McMillen officially discloses details of the Repentance expansion pack on Twitter.
- The Repentance DLC is officially announced to include the Antibirth mod alongside a ton of other new content - Edmund affirms it is "the FINAL (for real this time) DLC for isaac".
- Edmund will be working with the full team of Antibirth developers (Public Entertainment Networked Interactive Software - also known as P.E.N.I.S), Kilburn, LeatherIceCream, and NotYourSagittarius, on the Repentance DLC, which will also be published by Nicalis.
- Repentance, as a substantial addition to the game, will cost money.
- Repentance has no set release date yet - however, remaining Booster Packs are being worked on and expected to release within the next 2 months on console.
- Repentance will feature a new cutscene(s) & lore in the Isaac story.
- Repentance's soundtrack will be fully composed by original Isaac: Rebirth music composer Ridiculon (in name of cohesiveness) and not Antibirth soundtrack composer Mudeth, contrary to expectation of a full port of the mod's content - Mudeth adds that he will finish working on his own soundtrack nevertheless, but that it will have to be modded in instead.
Tyrone Rodriguez posted a tweet with "#IsaacRepentanceDev" hashtag of a gif showing off a new item, as well as new visual shaders in the Burning Basement.
September 3rd
Tyrone Rodriguez posted a tweet with the "#IsaacRepentanceDev" hashtag showing a new gif.
This gif shows Apollyon in Downpour with Curse of Darkness active. Some noticeable changes include:
- The return of the Antibirth item Lodestone.
- A new version of the item tracker, with smaller item icons compared to the original Afterbirth version.
September 4th
Video footage of _Kilburn playing the Repentance demo on the last day of PAX West was recorded and uploaded to YouTube by a member of the community, although it ended up being taken down by that user on June 23rd, 2019, for unknown reasons, since _Kilburn claimed that he has nothing to do with the user deleting all of their videos. However, the video was quickly discovered on another website then reuploaded to Youtube on the same day by another user.
- A mechanic of the Dross floor is demonstrated - there are rooms with rushing water that will actively affect Isaac's movement
- New item revealed:
- Plum Flute
- New enemies:
- Previously described green variant of an Attack Fly that moves in a single file along with other green flies.
- Variant of Mulligan that chases the player and periodically spits out poison gas.
- A round Dip variant in Dross that does short rolls randomly around the room, spawned by Dross Squirts upon death and Clog.
- A humanoid enemy in Dross that floats and chases Isaac. Surrounded by Attack Flies.
- Video footage of Clog's attacks and tactics in his battle.
- As well as more recurring enemies from Antibirth:
Tyrone Rodriguez posted a tweet with the "#IsaacRepentanceDev" hashtag showing a new gif of Lilith in Burning Basement fighting Baby Plum, a boss from the Antibirth mod.
September 6th
Tyrone Rodriguez posted a tweet with the "#IsaacRepentanceDev" hashtag showing a new gif.
This gif shows Cain in Downpour firing a total of 2 large tears in a shape of fists. This gif reveals:
- An Antibirth item called Knockout Drops, which had also been seen in the list of picked up items in the previous gameplay.
- A new tear visual, possibly a synergy with My Reflection and Pupula Duplex.
September 10th
Tyrone Rodriguez posted a tweet with the "#IsaacRepentanceDev" hashtag, this time showing a clear gif of Clog on the boss title screen.
September 19th
Edmund McMillen posted a couple of status report tweets where he announced Antibirth content and the new paths are being currently ported and polished, and that new content for the DLC is planned once that task is complete.
September 20th
Edmund McMillen made a tweet response, confirming that online co-op won't be added to the game.
October
October 8th
Edmund McMillen made a tweet about the status of Repentance and his other projects.
October 9th
Tyrone Rodriguez posted another tweet with the "#IsaacRepentanceDev" hashtag showing a new gif.
This gif appears to show Eve in Dross, attacking some of the new enemies.
- This reveals the attacks of the floating enemy that has Attack Flies surrounding it. It appears to cough up small gas and will release a large cloud of poison to push the Attack Flies far away, similar to The Duke Of Flies, although the Attack Flies appear to return to floating around it.
- The gameplay also reveals the Antibirth version of HUD
- A new rune that can be seen dropping next to Eve at the end of the video.
- Eve appears to have a new hair sprite for her Whore of Babylon state.
- Possibly a new sprite for
Clicker. - Finally, the tears fired by Eve appear to be shaped as a round circle instead of a pixel polygon.
November
November 8th
Edmund McMillen posted another status report tweet.
November 15th
Edmund McMillen posted a status report tweet talking about the first expected release date of Repentance,"the first half of next year".
January
January 11th
Edmund McMillen posts an image on twitter that is quickly deleted.
January 21st
In a Twitter Q&A, Edmund McMillen confirmed that The Witness will be in the game, although it'll probably have a name change. Two returning characters from the Binding of Isaac: Antibirth, Bethany and Jacob & Esau, are most likely being added in to the game. Addtionally, Edmund confirmed that true local co-op could be added in as well. Finally, Edmund clarifies while that a couple of redundant items got cut most of the changes to items are just edits.
February
February 13th
Edmund McMillen confirmed in another AMA that cut content from Antibirth would not be included in Repentance, but that unfinished content may still be finished and included.
February 18th
Edmund McMillen posted a tweet once again reconfirming that the DLC would be delayed, while also including a grayscale picture of what appears to be Isaac fighting a new monster in the Basement.
- Interestingly, this monster had been teased in a tweet Edmund had posted back in January that he quickly deleted soon after posting.
February 26th
Tyrone Rodriguez posted a tweet with the "#Isaacrepentancedev" hashtag, showing a new gif.
This appears to show Magdalene in the Mines floor from Antibirth. Some noticeable changes in this gif include:
- The room features a Bomb Grimace, a type of Grimace originating from Antibirth. It spits out a Red Bomb, which Magdalene uses to break rocks and access the Silver button to clear the room.
- Minecarts are used in this room, carrying Constant Stone Shooters.
- There is an unknown item in the item hud that appears to be a bloody PHD.
- Magdalene is holding the Broken Padlock, a trinket originating from Antibirth.
February 27th
Kilburn posted a screenshot on twitter.
Though in the format of a meme, this screenshot showcases shadows on item pedestals, a returning feature from Flash.
March
March 4
Edmund McMillen responds to a tweet in an AMA about rebalancing in Greedier Mode.
March 16th
Edmund McMillen responds to a tweet saying that Repentance will be present at PAX, later clarifying in another tweet that he means the PAX that will be held in August.
March 20th
Edmund McMillen tweets that the team is aiming to release Repentance sometime this year, with more teases to be released after Bum-bo. He also states in another tweet that Jacob's Ladder from Antibirth will be renamed in order to avoid naming conflicts with the already existing 
Jacob's Ladder.
April
April 13th
Edmund McMillen posted a tweet showing a new gif.
This shows Isaac in Scarred Womb. Some noticeable changes in this gif include:
- Isaac is carrying Mom's Bracelet, an item originating from Antibirth.
- The tear sprite for
Lost Contact appears to be rounder. Meaning the tears are now round circles instead of being pixel polygons as stated before. - Champion monsters appear to be recolored in a different manner, similar to Antibirth's champion colorings.
- The ground sprites for Freds, Para-Bites, and Scarred Para-Bites dynamically change their color to match the floor.
- This can be seen when one of them pops out of the ground over blood - the color changes to red.
- The Para-Bites themselves flash when taking damage, not the ground surrounding it.
May
May 9
Edmund McMillen posted a status update tweet about Bum-Bo and Repentance's expected release times, and about other games he is developing. This twitter post states that Repentance is expected to be released late Q4 of 2019.
May 27
Edmund McMillen posted a tweet showing a new gif.
This shows Isaac in Flooded Caves in a fight with Big Horn. Some noticeable changes in this gif include:
- Big Horn's ingame appearance appears to have been completely redesigned.
- Pits are now properly layered under the water effect instead of on top of it.
- Big Horn's hands splash the water when they slam down.
- Big Horn's shadow balls have their own sprites instead of being Little Horn's orbs but resized.
- The colors of the Flooded Caves have been changed, and the water now has a reflection effect similar to Downpour.
- Isaac is carrying Sulfur, an item originating from Antibirth.
- The Troll Bombs and Mega Troll Bombs appear to have a new lit fuse animation that originated from Antibirth as well.
- Marked appears to be able to synergize with Brimstone and familiars such as Brother Bobby. Marked also has a visible line showing the path tears will take.
- Tear Delay can now have decimal values.
June
June 14
Edmund McMillen had a twitter Q&A where he revealed that Edith, the unused Antibirth character, would not be in Repentance [1]. Other details revealed include possible respriting for bosses [2], changes to bosses and enemies [3], and that Antibirth characters will most likely have gameplay changes [4].
July
July 3
Tyrone Rodriguez posted a tweet showing a new gif.
This appears to show Isaac in Dank Depths. Some noticeable changes in this gif include:
- A new Buttlicker variant.
- Isaac is carrying Devil's Crown, a trinket originating from Antibirth. Interestingly, it is also in the item hud. This seems to imply that trinkets, including those that have been gulped or smelted can now also appear in this hud.
- Isaac has Freezer Baby, a familiar originating from Antibirth.
- There is an unknown item in the item hud that appears to be a ring or a dreamcatcher.
- The indicator for the angel / devil deal is apparently summarized. This could be a unique visual synergy with Duality.
- The Dank Depths floor appears to have a more detailed backdrop with tar colors.
- The Book of Belial has a new animation when being used.
- Lasers have a new animation and become bigger with a higher damage stat; in a similar manner to the original Flash game.
Edmund McMillen also had a twitter Q&A where he revealed that some Four Souls enemies may get added [5]. He also revealed that Delirium and The Void will likely recieve some minor tweaks [6]. The Red Key from Antibirth may be added to Repentance [7].
July 27
Edmund McMillen had a twitter Q&A where he revealed that Repentance would include Hornfel, and a new boss named Singe.[8]
August
August 9
Tyrone Rodriguez posted a tweet announcing that Repentance would be at PAX West. He also announced that they will be doing a live stream of the demo with Kilburn. In this tweet, he also shows a new gif.
This appears to show Magdalene in the Catacombs fighting The Wretched. Some noticeable changes in this gif include:
- fill this out pls
 The Binding of Isaac: Rebirth
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