You're kidnapped and awaken in some kind of underground complex. Who kidnapped you, and why? As you progress through the game, you realize that you're given a limited amount of time to escape. Thirty-one days. You need to find a way out while trying to survive in a dark and mysterious environment.

EXPLORATION AND SURVIVAL

Explore the underground, solve puzzles. Scavenge for resources to survive. Ammunition is scarce and enemies are tough, make your shots count. Find better weapons. Stock up on healing items. Search for batteries to keep your flashlight running. Manage inventory in real time. Find upgrades for your jacket.

FACE MONSTERS AND COME OUT CHANGED

Survive against the monstrosities lurking underground. Use stealth, crouch to reduce noise, and stay out of the enemies' line of sight. Aim for the head. Manage your stamina carefully. Turn the tide of battle by entering GRIT mode. Use GRIT to slow down time, enhance defensive and offensive abilities, change your shove into a powerful kick that launches enemies, and execute them when they're down. It is limited, use it sparingly.

WHAT IS THE PURPOSE OF ALL OF THIS?

Why were you kidnapped? Why were you given a chance to escape? Why are there monsters? Where are you? Are you being watched? Who's behind all of this? Piece together the story through dialogue, notes, and environmental storytelling. Uncover the conspiracy and discover the truth.