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The Binding of Isaac: Antibirth
An unofficial, fan-made expansion.
Created 7 years ago

This is an official post by the Antibirth team. Proof here.





Five years ago, a young boy took his first trip down into the basement, facing the endless threats below to escape from the murderous delusions of his loving mother. Three years later, he found himself facing the same predicament but with an even greater plague of horrors and peril. Very shortly afterward, a modest few among us decided that even this was not enough. In the two years since then, fate has worked tirelessly to place by far the most fearsome challenge yet in his path. This time, Isaac will face our free and fan-made The Binding of Isaac: Rebirth expansion, Antibirth. So what exactly is in store for him?


  • 2 new characters with unique playstyles
  • 90+ new collectible items to help Isaac fight
  • 18+ new trinkets to swap and strategize with
  • 80+ new enemies to face one after another
  • 16+ new bosses to kill or be killed by
  • 4000+ new rooms to explore and survive
  • A new secret final chapter for Isaac to endure
  • Bigger and greater secrets than ever before
  • Several new or enhanced features for local cooperative play
  • A nearly full and original new soundtrack, evocative of classic Isaac


The Binding of Isaac has had one of the most involved and robust communities of fans around since its initial release and has inspired countless players and developers with its peculiar sensibilities and creative blend of roguelike flavor. As its zealous modding community has proved, it's only natural that many among us would feel the urge to try to help carry the torch and make it partly our own, but Antibirth was the first and is presently the only Isaac mod to reach deep into the core of Rebirth to enable the depth and scope of a full expansion, aspiring even to the size of the official DLC, Afterbirth. If you've become as enraptured with Isaac as the rest of us and you still want more, we're here to provide our absolute best, and more of it than you've ever dreamed of, all for free.

With the nature of this mod's downloads, some antiviruses may act up when attempting to download Antibirth. The downloads from antibirth.com are completely safe to use - you should be able to download this mod without any issues.

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downloads
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what is the destination folder?
i can't see myself and enemies in the downpour who can help?
do other mods work together with this mod?
what folder do I put it in I tried resources, but it isn't working.
please help me out with this i really wanna try this mod

When you don't have enough money for repentance
ahuevo es mejor que el real muchas grasias manito
the antibirth always made me wanna get this mod along with the binding of isaac
Haven't installed it yet but I know its good
Still the best existing isaac mod even after repentance came out
i need this mod on the 3DS edition
guys im the real Lazarus ill give u pills if you like and subscribe can we get 42,069 likes on this video for free fortnite bobux?
How do i install this on a macbook pro?
You can't, its only for windows. But you can use "wine" and some other sites to make you Mac kinda like windows. :/
Isaac: Mom, can we have TBOI Repenetance DLC at home?

Mom: No, we have TBOI Repenetance DLC at home

TBOI Repenetance DLC at home:
" an unofficial fanmade expansion "

not anymore lmao
you should probably get that checked out, you ass is supposed to stay on
Because repentance has double the content from antibirth, and it's official now.
repentance is out no more requiring this mod because its literally official now
but,this mod is free repentance is payd
Repentace has A LOT more content
yeah, repentance has like MUCH more content.

I've been excited to try antibirth for years and finally got the chance, it's amazing, couldn't ask for a better mod, lots of fun!
I somehow ,have like 2 copies of a file named isaac-ng I can't delete either of them help me pls
Antibirth crashes anytime I try to launch it, I put it in the Rebirth folder and launch it from there, what do I do?
Ok for anyone reading, someone said "You need to copy every files in Steam/Steamapps/The Binding Of Isaac/ressources/packed , and paste them in [...]/The Binding Of Isaac/Antibirth/ressources/packed
If you don't understand just watch a tutorial.
I hope it helped you ", hopefully he helped you.
This actually worked! Thank you so much!
no its not, you'll downloading it from the oficial website
I dOn'T tRuSt mEdIafIrE", "iT's An eXe, sO iT's vIrUs", BRO, JUST STFU AND DOWNLOAD THE MOD
I think people need to stop thinking with the stomach. This mod is getting an official DLC, so why the hell would the creator do something like putting a virus in the thing? That doesn't make any sense at all.
Is Afterbirth + needed as I only have Afterbirth and this mod looks great!
does it work with afterbirth or just rebirth?
my antibirth just crashes whenever i click to run it, help me!
You need to copy every files in Steam/Steamapps/The Binding Of Isaac/ressources/packed , and paste them in [...]/The Binding Of Isaac/Antibirth/ressources/packed
If you don't understand just watch a tutorial.
I hope it helped you
coud you make a antibirth + pjs
Noice, i always wanted to play with som' guys
when i downloaded this it would no let me play rebirth
April 10, 2022 - 2 years ago
Hey! We have a new Discord server. You can find more information in the announcements channel there. See you there!