SO first it's pretty easy Pick up the flashlight, Then after the ayuwoki busts the door down Get killed by him, The point is if you dont die or respawn ONCE then you get the good ending but if you do die or restart you get the bad ending

This one is a little harder to do (By that I mean Alot) you have to not die or respawn Not even ONCE then you get the good ending after going through the game

So You Need to play through all chapters with NO FLASHLIGHT. And Have less than 6 deaths and do this under 90 minutes, You can pick up the candle though. Once you get to chapter 3 You will go up a staircase and hear a ringing with a bright orange light, Its a portal. Walk Into it and Then there will be a flashlight in there. THEN you can pick it up. There will Be the Shepherd of The Void who has rats coming out of him, Follow him and he will lead you into the void. Then You Have gotten the void ending.

So just play the game normally Then once you get to the floating objects room in chapter 3, go to the VENT rather then going upstairs for good and bad then you will be transported to the OG mansion just escape from there, dying wont affect this

https://www.youtube.com/watch?v=uBwQH6JNwKI