Layton’s Mystery Journey

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Layton's Mystery Journey rom

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Layton’s Mystery Journey: Katrielle and the Millionaires’ Conspiracy is a 2017 puzzle video game by Level-5. It is the seventh main entry in the Professor Layton series and follows a new protagonist, Katrielle Layton. It was released for Android, iOS, and the Nintendo 3DS, in 2017, and an enhanced port for the Nintendo Switch in Japan in 2018, and worldwide in 2019. A manga adaptation of the game drawn by Hori Oritoka began serialization on March 20, 2018, in Shōgakukan’s Ciao magazine, and an anime adaptation, Layton Mystery Tanteisha: Katori no Nazotoki File, began airing on Fuji TV and other channels in April 2018.

Layton’s Mystery Journey follows Professor Hershel Layton’s daughter, Katrielle “Kat” Layton, who solves puzzles in her father’s place alongside her talking dog Sherl and her friends Emiliana Perfetti and Ernest Greeves. When her father vanishes, Katrielle goes off in search of him, coming across various puzzles and mysteries along the way. Like previous games in the series, the game features various puzzles for the player to solve using the touchscreen as they explore the environment and progress through the game’s story.

Unlike previous Layton games, the game is split up into twelve distinct cases, with one overall theme, rather than one continuous story separated by chapters. Private detective Katrielle Layton, daughter of the famous Professor Hershel Layton, awakens from a nightmare about her missing father, on the day of her detective agency’s opening. The same day Katrielle and her assistant Ernest Greeves meet a talking dog that, for reasons unknown, cannot be understood by anyone else but them.

The dog explains that he has amnesia, and that he wishes for them to solve the mystery of who he really is, and Katrielle creates the name Sherl O.C Kholmes for him. After solving the case of the disappearance of one of Big Ben’s hour hands at the request of Inspector Hastings of Scotland Yard, Katrielle, Ernest and Sherl investigate and solve several other cases, most of them related to the “Seven Dragons”.

Seven of the most rich and influential figures of London, with assistance of Hastings and Emiliana Perfetti, one of the Yard’s profilers. Other cases include Hastings’ request to look for a present to his wife on a holiday and solve a murder that Katrielle was wrongly accused of committing. In one occasion, Ernest also tells Sherl the story of how he and Katrielle met, when he was falsely accused of theft and she helped clear his name as well.

File Name

Layton's Mystery Journey

Cart Size







USA, Europe & Japan





Release Date

July 20, 2017


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