From here, we need to create a folder that will store our custom challenges.
If you have any mods from the workshop installed, you should see them here. To find this, simply right click on the game in your steam library, click properties, and then click “browse game files.” From here, go into the folder called mods. Your custom challenge will be located in a mod folder within the Binding of Isaac mods folder. I recommend Notepad++ because it’s free and perfectly suited to our purposes. I would greatly appreciate any of these pointed out, and I will correct them. Much of the information with this guide was assembled through trial and error, and there may be inaccuracies.
Also my guide will be focused on Windows OS because Repentance is not on Mac. I will read the comments to this guide and answer what I can, but my knowledge is limited and I may be unable to answer certain questions.
I would also like to say that I have very little modding or coding experience. I used his as a jumping off point for this guide, but seeing as he is not updating it anymore and it is out of date, I have decided to carry the torch of custom challenge guides for the Binding of Isaac, because I think they are really fun. This is a guide for making custom challenges that iterates on Techpriest’s wonderful custom challenge guide.
