is a 3D role-playing video game developed by Interactive Brains for mobile phone devices and the Nintendo DS handheld game system. Plot Both versions of the game contain a campaign story where a man is unexpectedly warped into a labyrinth several stories tall while talking on his cell phone. Starting from the bottom, in the deeper of two basement floors, he quickly picks up a sword and shield and battles his way through every floor to the top, seeking the secrets of this mysterious place, answers to why he is trapped there and the identity of a mysterious girl whose soul is trapped in a crystal. Depending on how quickly the player is able to dispatch the final boss at the top, he may or may not save this girl. The Nintendo DS version has an extra, easier scenario intended for casual players, in which the main protagonists are a boy and his pet dog, named Shawn and Ace (Shou and Alf respectively in the Japanese version) respectively. One summer afternoon, Shawn goes for a drive with his parents and dog, Ace, but the family car suffers a flat tire in front of an abandoned mansion. Ace is upset by something inside the mansion and leaps out of the car to investigate. Shawn's parents follow Ace, but fail to return. As Shawn tentatively approaches the dilapidated structure, the entrance door swings open, and he's drawn into a magical vortex. Reunited with Ace, Shawn must travel into the heart of the Deep Labyrinth to rescue his parents. The North American and Australian box art for the DS version depicts the original scenario, designated as the game's second chapter, titled "Wandering Soul", while the European and Japanese box art conversely shows the Shawn and Ace scenario, which is designated as the game's first chapter. Both stories have their own separate continuities, meaning that characters from one story do not appear in the other. Gameplay Nintendo DS version From a first-person perspective, players must navigate through dungeons and environments in a 3-D world, battling enemies while searching for items, secret side areas and ways to unlock locked doors, whether with keys or magical spells. Both swordplay and sorcery are at the player's disposal, controlled using the Nintendo DS' stylus and touch screen, and the more frequently a player uses either means of attack, the stronger it will become. Players can also use shields