When you start the game, you can skip talking to your family and head straight into the house, unless you still haven't gotten the other achievements about talking to your family.

Once you enter the house, immediately go to the 3rd door to your right in the hallway. There, you will meet the rental dental man so you can skim through his dialogue.



After you speak to him, walk to the right side of the bed and search the drawer with the vase on it so you can obtain a key.



Get the cross from the same room and grab the mini stool right at the bathroom door.



Then walk all the way back to the entrance door that locked you in to grab the items in the drawer by it.



Now enter the 1st door to your right and search the 1st pillow on the long couch.



Then leave the room and go to the 1st door to your left and search the top cupboards infront of the fridge.



Leave the room again and enter the 2nd door at the left side of the hallway. There you can use the key to open the wardrobe drawers.



Leave the room and enter the last room at the left side of the hallway to get the picture of the angry man.



Now go to the very end of the hallway and move towards the picture to your left. That is the last item to unlock the secret door to the labyrinth.



You can just walk back to the newly emerged door and enter it.

Once you're in the mirror maze area, simply follow the path till you find the 1st cross. It's only one way so you won't get lost.



Then keep moving forward till you find 2 entrances next to each other.



Enter the first entrance and keep following it till you find the 2nd cross.



If you're still confused simply enter the 1st entrance, walk forward then follow the path: Right - Left - Right - Right - Left - Left - Right - Right. And you'll find the cross.



After you obtain the cross go back to the area with the 2 entrances again and enter the 2nd entrance.



Keep following the path until you find yet another set of 2 entrances. Here, simply ignore the 1st one as it is a dead end, and just enter the 2nd entrance.



Keep walking and you'll find the last cross easily. Continue through this path and you'll eventually find the door that will take you to the last part of the game pretty fast.

When you enter the door, you'll find yourself in some sort of rock space. Simply move forward till your character has a question mark over her head then interact with that area to place down your gathered items.



Continue walking in a circle and keep placing your items down to make the exorcism circle. Then walk to the middle of the circle and you'll see a question mark. Simply interact and you'll have your achievement !!



Disclaimer: This guide is what worked for me to finish the game in under 10 minutes, so if it doesn't help you then you should try to explore other methods that match your playing style !!!