Call of Cthulhu
49 Achievements
12-15h
The Thing on the Doorstep
Banish the Dimensional Shambler using only one dagger
35.1%
How to unlock the The Thing on the Doorstep achievement in Call of Cthulhu - Definitive Guide
To kill the Shambler you have to stab the painting, not the creature. In the gallery, there are numerous cases with daggers in them. With your back to the Shambler painting go to the far right-hand room and take the knife from the right-hand case on the far wall. Pierce will says, "This dagger looks different." Run up to the painting and stab it with A.
For clarification, with your back to the painting turn right in the area with the statues and left into the room with the weapon cases. I'm sure someone will post a video, this will have to do until them :]
EDIT: I added a short clip showing the location of the dagger.
Luckily, its very short and very easy..
You have to find a certain dagger to defeat it with .. you can find a drawing of which one you need behind the shambler painting.
So once you interact with the painting, you'll start with the painting behind you, if you look straight ahead you see two rooms you can enter.. go in the right room, the back right corner is where the dagger is.. run back to the painting, press A and job done.
Best advice I can give is dont stop too look where it is, its loud and it sounds close but keep running..
If you want to see where and how it exactly unlocks, then go to 1:14:15 in my playthrough 1 video.
Hope this helps
Playthrough 1
Playthrough 2
For this achievement, you must use a specific knife to defeat The Shambler. You can see a sketch of the knife on a scrap of paper behind the painting. The knife is in the display case furthest to the right against the back wall as you face away from the painting. See the video below for its location.
Missable!
At the end of chapter 6, you’ll inspect a painting and the Sambler will appear on this room and you will have to cut the painting with a certain dagger to proceed. Only one dagger will actually cut the painting, but many daggers can be picked up. For this trophy, you need to pick up the right dagger on the first try.
Starting from the painting and facing away, the dagger you want to use is located on the right room, on the bottom right corner of the room. Your character will say this dagger looks special or something along this line, so you know it’s the right one. If you pick up another dagger, go right to the Shambler so it kills you and you can retry.
What to do with him? Stick it to the picture. And in general, you can run away from a tramp...