Creating a mod - Temperz87/ultra-mod-manager GitHub Wiki

First you will need to download an installation of UMM (an installation tutorial can be found here), and then you will need to create a new Class Library (.NET Framework) in Visual Studio (preferably using C# version 4.7.2). After that, reference UMM.dll, which should now be in ULTRAKILL\plugins\UMM. The Mod loader will look for a class that inherits UKMod, and has the attribute UKPlugin, like so. After that, head over to the docs to learn more about UKMod's and UKPlugin's.