Layton's Mystery Journey

Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy
North American Nintendo 3DS cover art
Developer(s)	Level-5
Publisher(s)	Level-5
Director(s)	Akihiro Hino
Designer(s)	Kuniaki Iwanami Satoru Nagayama
Programmer(s)	Takashi Azuma
Artist(s)	Takuzō Nagano Masako Arakawa
Writer(s)	Akihiro Hino
Composer(s)	Tomohito Nishiura
Series	Professor Layton
Platform(s)	Android, iOS, Nintendo 3DS, Nintendo Switch
Release	iOS, Android WW: July 20, 2017 Nintendo 3DS JP: July 20, 2017 NA/EU: October 6, 2017 AU: October 7, 2017 Nintendo Switch JP: August 9, 2018 WW: November 8, 2019
Genre(s)	Puzzle, adventure
Mode(s)	Single-player

Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy^[a] 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.^[1]

The game centers on Katrielle Layton, the daughter of famous archaeologist and puzzle-solver Professor Hershel Layton. With the help of her assistant Ernest Greeves, she solves cases in and around London, alongside a talking dog that, for reasons unknown, only the two of them can understand. Unlike prior Layton games, Mystery Journey has no definitive overarching narrative, with most of its main narrative's premises existing as a basis for a set-up, and being left hanging by the game's conclusion.

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