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The Binding of Isaac: Antibirth Wiki
Welcome to the Official Binding of Isaac: Antibirth Wiki! A comprehensive encyclopedia for The Binding of Isaac: Antibirth that is written and maintained by the players. Make sure you familiarize yourself with the rules. -
Pickups
For changes to Rebirth pickups, see Changes. For pickups which are in the game but unobtainable, see Pickups (Unused) Antibirth adds a few new types of pickups. -
The Witness
The Witness is a new final boss introduced in Antibirth, always found at the end of the Corpse. When entering the boss room in Corpse II, the battle will not start. Instead, the room contains -
Planetarium
For a list of other rooms featured in Antibirth, check out Chapters. The Planetarium is a new unlock-able room type introduced in Antibirth that has a small chance to appear after certain criteria are -
Edith
Edith is not unlockable, because she was cut due to balancing/design issues! Edith is an unused character in the Antibirth expansion. She is unable to walk normally and instead moves around by teleporting to -
Unlockables
Unlockables are new content for the game such as items, characters, or challenges that must be unlocked. They pop up when something has been completed or achieved. -
Damocles
Damocles is a single-use active item. Bug! Double Treasure Rooms+ There's Options+ Birthright (when playing as Isaac) tend to crash the game with Damocles. Effects[] Upon use, summons a sword that hangs directly -
Items
For changes to Rebirth items, see Changes. Items are an integral part of game-play in The Binding of Isaac: Rebirth. They modify Isaac's Attributes, grant or modify Tear Effects, and much more. Antibirth -
Mausoleum
Mausoleum is a new environment added in Antibirth. It contains many necrotic-themed and psychic-themed enemies, as well as teleporters that can connect different parts of the same room or two different rooms. The -
Jacob & Esau
Jacob and Esau are unlockable characters added in Antibirth. Both Jacob and Esau are controlled simultaneously, and they have separate items, trinkets, and health bars. If one of the two characters dies, the other will -
Corpse
Corpse is a new environment added in Antibirth. Once all three knife pieces have been acquired, upon completing Mausoleum II, a red fleshy door will appear. On subsequent runs, this door will appear regardless of -
Red Key
Red Key is an unlockable active item. JABM M6NE - Curse room next to spawn -
Knife Pieces
Knife Pieces are a set of three passive items. After acquiring a Knife Piece, its puzzle will not need to be solved again in future runs, and the piece will automatically appear in the center -
Birthright
Birthright is a passive item. 9BSN 2V6M (Third Floor, in the Shop) Bug! This item tends to randomly crash the game upon pick up. Most noticed when picking up this item with the Jacob& Esau -
Perfection
Perfection is a trinket. It drops from a floor boss every three floors without taking damage, and cannot be found through other means. It will continue to be dropped by every subsequent floor boss if -
Bosses
Bosses are strong monsters found in boss rooms at the end of a floor. The boss at the end of the floor must be defeated to advance to the next floor. The boss for a -
Bird's Eye
Bird's Eye is a passive item. NTM8 X6S6 (First floor treasure room) -
Characters
For changes to Rebirth characters, see Changes. There are two new playable characters in Antibirth, Bethany and Jacob& Esau, each with a unique playstyle. -
Eye Of The Occult
Eye Of The Occult is a passive item. It appears in Devil Rooms with a cost of 2 heart containers. Effects[]+1 Damage.,+21 Range., -0.16 Shot Speed., Increases Tear Height so that shots -
Myosotis
Myosotis is a trinket. Effects[] Spawns pickups left on the previous floor in the starting room of the current floor. A maximum of 8 pickups can be spawned., A maximum of 8 pickups can be -
R Key
R Key is an activated item. Effects[] Upon use, restarts the game to the first floor, keeping all previously collected items. The game timer does not restart. Allows angels rooms to be found even if -
Monsters
For changes to Rebirth monsters, see Changes. Monsters refers to the many antagonistic creatures the player will encounter throughout the game. Antibirth adds over 80 new monsters, many of which are found in the new -
The Visage
The Visage is one of the bosses that can appear in Mausoleum. It is a more difficult version of the Mask of Infamy. Much like the Mask of Infamy, during the first stage of the -
Changes
This page documents Antibirth's changes to Rebirth's content and its expansions. The Lost[] The Lost now carries the D4, the Holy Mantle, and has spectral tears, without the need for Afterbirth and its -
Downpour
Downpour is a new environment added in Antibirth. Treasure rooms in Downpour always have two items to choose from.
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