Doki Doki Hazbin Hotel
Most mods install on top of a fresh copy of DDLC, free from ddlc.moe. Follow the author's instructions, and keep a clean copy of the game.
About this mod
The bros of the Doki's were just chillin' that day, Later Satori and Elijah decide to perform a spell read from 4chan, only to get shocked when the spell actually works. Now they've entered Hell and go on a heroine adventure. NOTE: This was made pre-show airing, so expect dated info to be used here