Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy is a puzzle game developed by Level 5 and released on Nintendo 3DS. Continue Reading → Jump to a section: Home Releases Credits Overview Walkthrough Achievements Cheats Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy Brainwaves View all → Discussion Article Thought Review 100 Share Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy with others Layton's Mystery Journey: Katrielle and the Millionaire's Conspiracy Releases Credits Characters List Overview Walkthrough Achievements Cheats Updates