Alone in a large dark house, you have to survive as long as possible before being inevitably defeated by the ghastly presences haunting the place. You'll be chased by shadow puppets, you cannot damage them, but they will damage you on contact. You'll need light to see them. Each shadows comes from a puppet somewhere in the house, you can destroy the shadow by destroying its puppet. Once destroy, it'll turn into a blue light puppet that heals you on contact before disappearing. When you shoot at a shadow, it'll emit a small particle that will moves toward their puppet, giving a hint on where to find them.