Don't Knock Twice

MISSABLE

There area total of 13 Russian stacking dolls scattered around the game that you need to find and destroy. They do not need to be found in one playthrough, and you can start another playthrough to get the ones you missed (although they all reappear so you will have to know which ones you are missing). When you find one, you can either pick it up and throw it to break it (just make sure it breaks as sometimes they just land without breaking) or hit it with an axe. You will know it was destroyed as it will disappear into a misty cloud. You can find them located as follows:

1) At the very beginning of the game, look to the left of the desk with the laptop on it behind some boxes on the ground.
2) After you exit the house into the courtyard area, head to your right to find a gate and a lamp to you can light. Under the lamp is a pot you can pick up and the doll is under it.
3) In the room with the staircase & fireplace, head to the other side of the fireplace and open the closet door there. The doll will be on top of some boxes on the left side.
4) In Chloe's room's closet, look to the right in the back of it to find a doll on top of a box
5) When you enter the pentagram room, instead of going down the stairs, turn to you rright and go down the walkway there until you find a desk with a doll on it
6) In the room with the pentagram, look into the room to the left of it where the statues are and walk up to the woman in the middle. Turn to your right and walk straight ahead behind the statue of the guy on the ground to some shelves and on one of the lower ones you will find another doll.
7) After finishing the water portion of the pentagram, a door behind it will open. Enter the hallway and pick up the flamethrower on the shelf and continue down the hallway until you reach a bunch of vines/leaves blocking your path. Use the flamethrower on them to destroy it and then look a little further ahead on the ground to your left behind a post to find a doll
8) In the kitchen, head over to the stove and do a 180. The doll will be on a shelf under the center island there.
9) In the upstairs hallway there is a cabinet that is padlocked shut. Grab an axe and hit the lock off of it. Inside the the left hand side is a doll.
10) In the bathroom (first room on left at the top of the steps), go over to the toilet and the doll is in the bowl next to it
11) After you cross the bridge in the basement area, go around the corner to find a padlocked cabinet. Use the axe to open it and the doll is on the right side of it
12) After hitting the key on the piano to open the secret wall, go into the small bathroom and look on the dresser in the back left corner for a doll
13) Grab an axe and head to the game room. Break off the handle to the door in the corner by the windows/pool table and then follow the path into the crawl space to find a doll on the ground in the back right corner

After you destroy the final one, the trophy will pop.

The video in The Servant's Curse shows the location of all of the dolls.