"Katrielle and the Millionaires' Conspiracy" is a puzzle-adventure game developed by Level-5. It is part of the Professor Layton series and features Katrielle Layton, the daughter of the famous detective Hershel Layton. Players solve various mysteries in a charming, animated world while interacting with quirky characters. In the game, Katrielle opens her own detective agency and takes on cases involving wealthy clients. The story unfolds through engaging dialogue and challenging puzzles, encouraging players to think critically. The game combines elements of exploration, deduction, and storytelling, making it accessible to both new and returning fans of the series.