As one of LEVEL-5:s masterpieces, the PROFESSOR LAYTONS series of puzzle adventure games has sold more than 15.5 million units worldwide to date. Its newest official sequel is Laytons Mystery Journey: Katrielle and the Millionaires Conspiracy. Not only will the main character switch from Professor Laytons (Hershel Layton) to Kat (Katrielle Layton), many of its characters will be brand new. The story will focus less on dynamic problem-solving and more on solving multiple mystery cases observed in the everyday lives of Londoners, which will bring a faster tempo and more comical tone to the series. It will be more familiar -- and funnier -- than ever, while maintaining an adventurous quality. The creators of the puzzles and brain-teasers, the core element of the series, will also be new.