Layton's Mystery Journey: Katrielle and the Millionaires' Conspiracy is LEVEL-5's 2017 entry in the long-running Professor Layton franchise, released on Nintendo 3DS and mobile platforms (iOS and Android).
The game departs from the series' usual emphasis on Hershel Layton as the protagonist, centring instead on his daughter, Katrielle, who runs her own detective agency with an assistant named Ernest and a talking dog, Sherl.
Background and platforms
The Professor Layton series began on Nintendo DS in 2007 and established a reputation for narrative-driven puzzle adventures.
LEVEL-5, the developer behind the franchise and other hits like Inazuma Eleven and Yo-kai Watch, carried that design philosophy into this title for the 3DS eShop and mobile storefronts.
This review was conducted on the Nintendo 3DS version.
Gameplay and design
Layton's Mystery Journey preserves the core Layton gameplay loop: point-and-tap exploration, touchscreen-driven interaction to locate hint coins, conversations with NPCs, and a steady stream of standalone puzzles woven into investigation segments.
Where the series traditionally relied on a single, overarching mystery, this entry adopts a more episodic structure, breaking the experience into multiple shorter cases that resolve independently before converging toward a finale.
Puzzles and difficulty
Fans of the series will find familiar puzzle design cues: questions that hinge on wording, lateral thinking, and occasional red herrings.
As one long-time player phrased it, the Layton puzzles are built to outwit the solver, frequently rewarding a sudden, satisfying moment of insight.
This instalment offers an extensive assortment of brainteasers compared with earlier entries, but puzzle quality is mixed.
Several puzzles deliver those classic “aha” moments, while others rely on trial-and-error or recycled ideas that can feel unsatisfying.
Story, tone and characters
Shifting the spotlight to Katrielle changes the series' narrative tone.
The game favors bite-sized, self-contained cases and lighter stakes rather than the more tightly knit, high-stakes arcs of past titles.
Katrielle herself is portrayed as cheerful and energetic, supported by Sherl’s sarcastic contrast; character dialogue—often unvoiced—is written to capture British-flavored humor and charm.
Verdict
Layton's Mystery Journey retains much of the franchise’s signature DNA—puzzle-focused gameplay, strong character hooks, and polished presentation—but its episodic format and uneven puzzle set make it one of the more divisive entries.
This review awarded the Nintendo 3DS version a 7/10, noting that while the game offers plenty for puzzle fans, it falls short of the series’ highest standards in narrative cohesion and puzzle consistency.
Version Tested: Nintendo 3DS
Review copy provided by Nintendo