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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 994

- 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!

ok,i create a run,i click "play" and TBOI antibirth opens.
what i i have to do to use my custom 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.
I downloaded the newest custom challenge creator. The program opened normally but when I clicked on "play" it just opened Afterbirth+ without any of my modifications or customizations. Please help - what am I not doing or missing?
Why do my game crash every time i make a custom challenge?
plz answear fast!
if you get an app called wine bottler it will open the file just fine but you need to direct it to the binding of Isaac steam folder.
Man I can't start normal runs anymore this shit is broken
my isaac rebirth wont start anymore
Yes because that's the launcher for AFTERBIRTH.
Doesn't work... the last update was 2015 and I'm in 2017 with it not working...Please update or make a newer version!
It worked on a cracked version of afterbirth+ but it didn't work anymore when i bought the game on steam with afterbirth and +
did you change the location of where you steam game is located?
when i use the play option it wont use the challenge i set, please help
can you plz add the new items added in the first booster pack
and if possible plz allow hush and delerium goals sense they have completion marks
can you remove items from the run without starting over?
Yes, just click on the item and press delete on your keyboard
how do you start the challenge you make I tried and I cant.
January 20, 2017 - 5 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.