Hi, I managed to get all the endings by some sheer luck as well as trial and error lmaoo! Endings 5,6,7 were the most difficult for me bc I think I had a bias towards Las the entire time.
Ending 7: Happens in Cycle 3. You have to refuse Shadow 3 times,and be really dismissive. Go to tv room: 'Leave me alone with the names', don't go with him: 'no', go to the curtain during hide and seek, don't let him touch you if he asks (may need to play beer pong in a previous/this cycle to unlock and let the skeleton keep his arm over your shoulder).In the basement, refuse to go with him to his world
Hope this helps x