Brain Dead 13 follows the story of a young computer expert who visits a mysterious castle to repair a computer. However, things take a turn for the worse when he soon finds himself in a desperate situation. With no clear escape route, the player must rely on their wits and judgment to navigate through the treacherous terrain.
The gameplay revolves around the player's ability to control the character's movements, making choices that will determine his fate. The game is heavily influenced by interactive movies, where the player's decisions will often lead to death if they make an incorrect choice. This adds a layer of tension and unpredictability to the experience.