Hey Guys & Gals!
This is my 100% Achievement/Trophy Guide walkthrough (& All Collectibles) for 11-11 Memories Retold and is divided into 2 parts.
So this is a timed achievement that basically happens at the end of chapter 1-5.
You will know the point because Harry will have just been smashed underground AFTER going through the Vimy battlefield.
The next scene, Major Barrett appears standing on the trench with a gun pointed to Lothar (Kurts companion)
when the option comes up on screen.
If you prefer a video guide, head to 1:14:55 in my Part 1 video to see exactly where.