This is very easy compared to the game and other DLCs. You won't even need this guide. The executioner features an action that allows for hidden items to be found by pressing
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The DLC takes place in 3 locations; manor, basement of manor and final area. Once you got to the next area, you can not go back. However, if you miss one a new game+ will keep your stats for this achievement. You will need to play through at least twice if you are going for all the achievements but a third is highly recommended.
#1 As soon as you enter the manor, the file will be in front of the doors on the floor
#2 To the left of the previous letter, enter the only available door on this floor. Inside is a save mirror and a store. Check the sink under the save mirror.
#3 SCAN STORY RELATED Go upstairs and enter center door. Scan the room to reveal the statue and check there.
#4 SCAN Back downstairs, go through the door on the left. Inside the dining room is a picture on the left that SCANNING will reveal the letter.
#5 SCAN Entering the right side of the manor, there will be a point where you need to teleport. After doing so, SCAN the piano to reveal the next letter.
#6 SCAN After opening the upstairs doors, make your way around the hallway until you find the apparition of your daughter. Not far from hear is a bedroom and scanning will reveal the next letter.
#7 SCAN In the upstairs hall, there is also a bathroom. Scan there to find the letter.
Point of no return- once you enter the center hallway, there is no going back
#8 In this really long hallway, it will be hard to miss this one.
#9 In the basement now, enter the save/store room to the left. Check the shelf inside.
#10 SCAN Go through the door to the left that has now opened. Inside this room enter another door to the left and SCAN the pile of bodies. If you reached the hot mashers, you went too far.
#11 You will enter a room full of spinning spikes. Check the floor near two stationary spike traps; near where you daughter was walking.
#12 SCAN Back in the center area, the second door should now open. Go straight into the room in front of you and scan the body.
#13 Hard to miss this one. As you enter the next area, you will see your daughter again and at her feat will be the letter.
#14 you will enter the final save/store room. Check the desk in the back of the room to find this.
Done! I told you this one was easy.