Sanitarium is a graphic quest with an isometric camera view and horror elements. The main character gets into a car accident and loses his memory. In a vain attempt to remember his identity, he begins a journey into frightening parallel dimensions, where the world around him is twisted by anger and madness: in one of them, children worship the plant-like alien Mommy, another was a victim of a flood, and the only piece of land turned out to be a circus of freaks. These worlds allegorically lead the hero to an insight into the whole truth regarding his past and fears deeply hidden in the subconscious.