Nintendo DS game Obunsha Deru-jun is a free to play online game located in Japan. The game is made by 2K Games and was released on September 18, 2009. The game is dedicated to Rika, a cute DS that has gone crazy since being abandoned by her previous owner. Obunsha Deru-jun is a spiritual successor to the popular Riddle Games game app, allowing players to become the next Obunsha Deru-jun by solving mysteries and rescuing friends. The object of the game is to get as many points as possible, before the final message from the game says 'You may, but there is one condition.' The game is filled with hidden tips, opportunities for premium items, and more.