What curiousBystander said is correct, but there's one other thing to know. There is an ending that you can get permanently locked out (though you're not likely to do it by accident). It works like this:If I want to savescum bunch of endings without ng+, when should I make a back up save? How many endings are there actually? I could google it of course, but I'd rather ask here and not risk google spoiling stuff.
- Normally, you can pick any ending you like from the final room, except one, call it ending S for special
- If you trigger event A, you can ONLY pick ending S from the final room
- After triggering event A, you can then trigger event B, which will revert things to normal (can pick any ending except S)
- If you trigger event B, you cannot go back, you're permanently locked out of ending S
Behind that boss's chamber is a hidden area. At the bottom of it is a door. Opening that door will trigger event A and lock you into ending S.