In the first-person horror game, the action takes place in a dark industrial building with gloomy walls and a terrifying atmosphere. The protagonist of the story is Oswald Mandus, a prominent meat product manufacturer, who wakes up in the described location. Despite gaps in his memory, he realizes that something unpleasant has happened to his sons and he must help them. He is haunted by nightmares and needs to overcome his amnesia in order to understand how to save his children.
The game features puzzles and tasks that need to be solved in order to progress through the story. Oswald encounters moving objects and often comes across human-pig hybrids while solving puzzles, so it is preferable for him to move stealthily. If he is attacked, he can either escape or hide using various methods. If unsuccessful, the player immediately dies once the monster catches them. They then respawn at the nearest checkpoint, often at the beginning of the level.