Kakugo no Susume, known in English as 'Apocalypse Zero', is a post-apocalyptic anime series that follows the story of Kakugo Hagakure. Equipped with a powerful exoskeleton, Kakugo battles grotesque mutants in a devastated world to protect humanity. The series is renowned for its intense action, graphic content, and unique art style, making it a cult favorite among fans of the genre.