Trenches (UP)

This has changed as per new update, once you go through the door after collecting the key you will have a doll in front of you on the ground, from here go immediately to your right, then left (from here there is only one way to go) at the end there will be a picture, don't think you have to interact with it but interact with the picture just in case.
I only found this information because there was a comment on the youtube guide.

Hope this helps people

This 100% walkthrough guide will show you how to unlock all 11 achievements in Trenches within 8-10 minutes. Trenches is a first person horror game, where you'll need to navigate a maze of trenches from WW1.

00:00 - Introduction
00:57 - Road To Nowhere
02:55 - Hangman
03:33 - Cradle Will Fall
03:54 - Path-Finding
04:17 - Bunny
04:55 - The Woman Statue
05:21 - White Lady
05:36 - Cutting The Wire
06:24 - Play Me A Song
06:51 - Getting Dirty
07:22 - Need A Hand?

From collecting the map, head back down the alley, then take a right and then a left. Move around in this initial area (before going down the left of the alley), and this will unlock after a few seconds.