Waking up in a cramped white box, you don't remember who you are or how you got here. Together with you is a mysterious man, calm and indifferent to your horror. There are only cold walls around, and not a drop of water, not a piece of food... Five days. Five days of hopelessness, hunger and madness. Can you remember your past, get out of the box and stay human?

[From itch.iop]