The Professor Layton series was a huge hit on the DS, and the franchise has continued on Nintendo's 3DS in a big way with Layton's Mystery Journey showcasing his daughter Kat. This incarnation also hit mobile devices thanks to iOS and Android releases. This entry includes 12 cases and on mobile, it's split into several different variants. While hte first case in free, you can choose to just buy additional case packs one at a time or buy them all in one full purchase within the game itself. The mobile version includes extra puzles that you can download to your device each day and the game is completely playable offline outside of the online-only bonus puzzles. The free Starter Kit case is available now on both the Google Play Store and via Apple's App Store.