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Afterbirth Custom Challenge Launcher
Make your own challenge runs!
Created 2 years ago
This is my custom challenge launcher for Afterbirth.
You can create your own challenge runs and share them with friends.


-Customize starting HP and consumables
-Choose starting trinket and card/pill/rune
-Choose starting items
-Enemy and boss health multiplicator
-Simple item pool editor
-Load/save challenge runs and share them through codes or files
-Random run generator

The item pool editor is a very simple tool which let's you change/combine item pools. For example you could make treasure rooms contain angel room items instead of treasure room items or you could make shops sell devil items AND shop items.

If you find any bugs or you have any suggestions feel free to post them and they might be fixed/included in the next version. Also I'm not a native english speaker, so if you find any GUI text which is bad english feel free to correct me.


Just download the binary and start the .exe file. The tool should automatically detect your rebirth folder. If it doesn't it will prompt you to enter the root path of your Binding of Isaac - Rebirth installation.

Modify anything you want and hit the "Play" Button to start the run.

Using this tool may override following files. So it may collide with other mods which are using the same files:



x 1029

- Added "Blindfolded" option

- Added "Deep Pockets" item

- Fixed bug where modifying itempools lead to an error message on starting the game.

- Added new items/trinkets and character unlocked by the ARG

- Minor bug fixes

- Randomized runs now randomly add items to the ban list

- Improved UI

- More "Random" buttons

- Ban items

- Choose a character for your challenge!

This is perfect for challenging challenges
Where do i find my root path to my rebirth folder?
i was wanting this a long time ago and i finnaly found it
Great to do real challenges and mostly dumbs runs!
the game just crashes even with one item
ok,i create a run,i click "play" and TBOI antibirth opens.
what i i have to do to use my custom run??
The run is your next run, so you just have to start a game and it will be using the items and health and all that in that run.
does it work with afterbirth+ for anyone else?
It doesn't work for me.
In afterbirth+ you have thing called "console"
nah man, it's an .exe file, so it will run on only if you have wine, or else just run a virtual machine, it should work just fine.
January 20, 2017 - 7 months ago

A new animated Planetarium theme (from Antibirth) is now available!

There is a new DLC search filter on the Browse Mods page.

Added the 50 new babies from Afterbirth+.

The What's New sheet will try to get your attention when there is a new site update.

Fixed some mod icons not changing after being updated.