This is why iPhone gaming could prove to be a successful venture for Apple. Square-Enix will be releasing a touch-controlled RPG called 'Crystal Defenders' to the iPhone in Japan. Mobile games have been historically successful in Japan as many people play them while riding the subway trains.
There is no word of an international release, but we definitely want to get our hands on this "defense simulation" game. We're pretty sure this is a tower defense game with a Final Fantasy Tactics feel.