1: complete all the other endings and start up a new save (99% sure about this one...)
10: Do all the complicit options (follow whatever makes pale visitor the happiest), don't take the cigarettes and when the visitors come, go outside with him. choose "what I felt for you" then "I want to kill you" !! :3 the rest is linear
11: Do whatever up until you're free to roam the house, go into the closet, click the top left boxes and take the camera, on the next visitor check tell him to take a photo, when he offers you food vomit