Chapter 11 You will be back at your house this is one of Six ending and you need to do all six for separate achievements.
For this ending first, you want to grab the bobby pin out of the garbage and head into the house head upstairs and grab the screwdriver from the from the table next to your room and head back downstairs and into the kitchen and then into the bathroom you will notice a trap door in the floor, use the screwdriver to open the trap door and head inside you will find Someone down there after a conversation head back up to the second floor and use the bobby pin on you sister door when your inside here room you will unlock the loop.