'Tetris Effect' is therapy for distracted, anxious minds

Can a video game be more than just a game? Can it train you to focus? To disassociate yourself from traumatic memories and heal your mind? Can it transcend your personal experience and bridge a geopolitical divide? These aren't just ridiculous claims from a marketer's fever dream -- one video game has done all of this before, reaching hundreds of millions of players: Tetris.