Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy

Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy is a puzzle game developed by Level-5 for iOS, Android, and the Nintendo 3DS.

History
The game was announced in July of 2016, then known as Lady Layton: The Millionaire Ariadone's Conspiracy. It was renamed to its current name in April of 2017.

In July of 2017, the game was released worldwide for iOS and Android devices, as well as the Japanese 3DS release.

The worldwide 3DS release came out on October 6, 2017.

Game-play
The game harbors a different game-play style than its predecessors. While still adopting the puzzle style and challenges of former Layton games, it also instead has not one single narrative, but several narratives told throughout different chapters, rather than the single narrative told throughout different chapters in former Layton games.

The player character is also different, with the player acting as Katrielle Layton, Professor Layton's daughter. Interestingly, this is also Katrielle's first appearance.