Shadows of Yesterday

From publisher blurb:

The Shadows of Yesterday is a one-shot survival horror scenario set during World War I.

Some wounds never fully heal; you can’t remember how long you’ve been here in the hospital, but the nurses say that you were injured during a battle. They say you’re lucky to be alive. You remember the mud and the blood, the trenches and the whistle and roar of incoming artillery… But there’s something else, something terrible and elusive that lurks at the edge of your memory. Your war may be over, but the horror has only just begun.