A week and a half ago, I wrote about Layton's Mystery Journey and how I felt about it. Sadly, and quite frankly, my tone on the game hasn't really changed. Naturally, there are various reasons for this, but the big one is clear. The new entry in a beloved series feels like a serious step down, even though there are plenty of things to like. Katrielle and the Millionaires' Conspiracy does its best to pull off an impressive feat, but it leaves some corner stones to accomplish just that.
In the Millionaires' Conspiracy, you play as Katrielle, the daughter of the famous Professor Layton, who follows her in her father’s footsteps and starts her own detective agency. She wants to solve some grand mysteries and hopes to find engaging investigative work. Sadly, the reality of the situation is that you tackle much simpler cases with various levels of intrigue. This sees you finding an arm of Big Ben as well as tackling a mysterious murder at the Thames. Nothing was honestly bad, but that is mostly due to the entertaining characters that you meet.>
Source : http://www.nintendoworldreport.com/review/45592/laytons-mystery-journey-katrielle-and-the-millionaires-conspiracy-3ds-review