Developed by LEVEL-5, LAYTON’S MYSTERY JOURNEY™: Katrielle and the Millionaires’ Conspiracy is the latest game in the best-selling Layton Series and first official sequel debuting on mobile.

Join Katrielle Layton in the heart of London, as she becomes embroiled in a casual, comical, quizzical quest, which has its roots in our new hero’s search for her missing father, Professor Hershel Layton. You’ll be whisked around London’s famous landmarks, from the Houses of Parliament to Tower Bridge, following Kat on her trusty bicycle, solving case after unlikely case, until she unwittingly uncovers the Millionaires’ Conspiracy.

Help Kat and company discover clues, unravel mysteries, deduce the truth, and solve original puzzles! Redecorate the agency and redress Kat in various outfits to suit the case at hand (or your mood). With twelve intriguing cases, seven multi-millionaires, and one whopper of a conspiracy, will Kat ever be able to find the missing professor?

Full of ingenious challenges, charming characters and clever plot twists, the latest Layton instalment will prove to you beyond a shadow of doubt that the truth IS stranger than fiction!

Game Features
·       Modern, female protagonist
·       The largest collection of puzzles in any Layton Series title
·       Bonus! Daily puzzles delivered directly to your mobile device
·       New cast of characters (and some favourites from the past)
·       High-quality, visually rich gaming experience
·       Customizable costumes and room décor
·       Additional minigames
·       Offline play after initial download

*This game can be played in English, French, Italian, German, Spanish and Dutch. Other languages cannot be selected in your region.
**Bonus daily puzzles will require Internet connection for accessibility & download.

What's New

Version 1.0.6

- Added a new outfit
- Corrected a few minor issues
* The option to redeem campaign promo codes via ‘Promo prizes’ has been removed from the ‘Bonuses’ menu section due to the Real World Puzzle Solving campaign ending.

Ratings and Reviews

4 out of 5

15 Ratings

15 Ratings

Fun game, lazy port.


This game is pretty much the quality you'd expect from a Layton game with the new characters making it feel fresh. Sadly this mobile port has just been lazily done - in short rather than making use of the iPhone's full screen to play it just splits your screen in half as if it were a DS. I think this works fine or is even necessary for the puzzles, but not for the exploration or talking sections. It wouldn't have been that hard to change these sections into full screen on mobile (even if the user has to shift between orientations for the different modes - that actually would have been cool) as it is it honestly just smacks of laziness. Especially disappointing with there being such a huge lag in release date for the English 3DS version.

Decent game, but nothing special


I found this game decent. The puzzles were ok, but rarely sublime. The interface was held back by being a very basic Nintendo ds port (emulating the two screens on the iPhone).
The stories were ok, but, for the most part, I play for the puzzles and the stories became an obstacle to get to the next puzzle.
The puzzles were disjointed, often having no connection to their location in a scene.

Way too much dialogue

Emm jee

The puzzles and the story line of this fame are great, it has the same look and seek as the professor Layton game. My only issue is that there is too much unnecessary dialogue between the characters in between the puzzles and most of it is irrelevant to the storyline. Would recommend paring this back, especially as most people downloading this game do so because they enjoy solving the puzzles and mysteries


Level-5 Inc.
1.5 GB
Requires iOS 9.0 or later. Compatible with iPhone 5s, iPhone 6, iPhone 6 Plus, iPhone 6s, iPhone 6s Plus, iPhone SE, iPhone 7, iPhone 7 Plus, iPhone 8, iPhone 8 Plus, iPhone X, iPad Air, iPad Air Wi-Fi + Cellular, iPad mini 2, iPad mini 2 Wi-Fi + Cellular, iPad Air 2, iPad Air 2 Wi-Fi + Cellular, iPad mini 3, iPad mini 3 Wi-Fi + Cellular, iPad mini 4, iPad mini 4 Wi-Fi + Cellular, 12.9-inch iPad Pro, 12.9-inch iPad Pro Wi-Fi + Cellular, 9.7-inch iPad Pro, 9.7-inch iPad Pro Wi-Fi + Cellular, iPad Wi-Fi (5th generation), iPad Wi-Fi + Cellular (5th generation), 12.9-inch iPad Pro (2nd generation), 12.9-inch iPad Pro Wi‑Fi + Cellular (2nd generation), 10.5-inch iPad Pro, 10.5-inch iPad Pro Wi‑Fi + Cellular and iPod touch (6th generation).
English, Dutch, French, German, Italian, Spanish
Age Rating
Rated 4+
©LEVEL-5 Inc.
In-App Purchases
  1. Kat's Clobber & Puzzles Set $22.99
  2. Kat's Cosplay & Puzzles Set $12.99
  3. Monotone Minidress & Puzzle $2.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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