Chaos Rings: Square-Enix's new RPG for the iPhone

Five pairs of warriors are forced to participate in a tournament where they will fight to the death. You'll play through multiple scenarios focused on each pair, and only by clearing each scenario will you be able to see the full story. The battle system lets you attack enemies on your own, or in "pair" mode. In pair, you'll cause greater damage, but you'll also make both warriors more susceptible to damage. There is no release date, yet.