I'm not going to tell you how to unlock it, but there's a secret "Extras Menu" that will get more stuff added to it as the game's development carrys on.

THIS IS SO UNDERRATED BRUH

This looks promising! Just know that Castle stops recommending decks about a month after they are released, so you might want to update both this deck and another deck with the same stuff but privated so when you finish you can release the private deck and it’ll be recommended more than this one.

Added power, power usage, time progression, new camera sounds, doors and camera system decrease power quicker. Main menu select sound changed.

Added more to Night 1. (Alpha version cams, and a honkable poster)

Btw, I am still working on this, but I think it will be hard to do because everything that I've learned about Castle was on my own. So it may be hard to get the animatronics to work. But I will still update this and hopefully get it to a "working game" status. Thx for the nice comments guys.