Doki Doki Rewind/Replay
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
If you want a short synopsis of what’s in store - well, first off, I’d recommend just going and playing it first, since it’ll be more fun that way and all - but, here’s a quick description behind some spoiler tags: Essentially, I’m trying to go for “Groundhog Day and Stanley Parable, with a mix of humor/drama/horror/romance,” in what is turning out to be an extremely large mod.