Left all alone in a desolate WW1 bunker with only one bullet remaining in the barrel, it's up to you to face the oppressing terrors in the dark. Keep the lights on at all costs, persevere, and make your way out alive. In the shoes of the French soldier Henri Clément, you are armed with a revolver gun, a noisy dynamo flashlight, and other scarce supplies to scavenge and craft along the way. With randomization and unpredictable behavior, no play-through is the same. Hunted by an ever-present threat reacting to your every move and sound, you must adapt your play-style to face hell. Every decision will change the outcome of how the game responds.