The fourth instalment of the Professor Layton puzzle adventure is a prequel to the original games. Three years before the events in Professor Layton and the Curious Village, Professor Layton receives a letter from his old schoolmate Clark, telling him that "a mysterious giant is destroying the town". The professor heads to the town of Misthallery to investigate, and is joined by Emmy, his new assistant. Features Players move the mysterious story forward by solving a multitude of brain teasers, riddles and conundrums. This game contains more puzzles than any in the series so far. Free downloadable puzzles will be available after the game's launch. Players will unlock a bonus role-playing game called Professor Layton's London Life that contains 100 hours of additional content. In the bonus role-playing game, Professor Layton and characters from the series live in "Little London". Players can customise their characters with special clothing that will help them enter certain areas of the city or perform certain tasks to help out the townspeople.