Mystery Case Files: MillionHeir is the upcoming Nintendo published DS casual mystery and puzzle game. An all new entry in the popular Mystery Case Files series for the PC and Mac, MillionHeir's story focuses on the mysterious disappearance of the aptly named Phil T. Rich. The player takes the role of the Master Detective who is brought in to solve the case and find the rightful heir for Mr. Rich's riches.

The "seek and find" gameplay tasks players with investigating the twelve potential heirs by searching for clues interwoven into thirty detailed scenes. With over 1,000 items to find, there's a lot of searching to be done. Once the player finds enough items in an area, it is considered to be "cleared" and the player can move on. All of the searching is done via the touch-screen, allowing the player to investigate the settings with simple stylus gestures. The game also features mini-game "brain teasers" between each of these areas.

Mystery Case Files: MillionHeir features multi-card multiplayer modes, with up to four players able to play at one time. The game's co-op mode lets players search for clues together. The competitive mode pits players against each other to see who can find the most clues hidden in a scene. MillionHeir also features DS Download Play, allowing players to send a demo to other DS systems.

Mystery Case Files: MillionHeir will release September 8th, 2008 as part of Nintendo's Touch Generation series. It is rated E for Everyone by the ESRB. Check out the official trailer for the game below.