Chaos Ring Omega is the latest entry in the Chaos Rings series, The original Chaos rings was released for iPhone, iPod Touch, and iPad in 2010, and went on to the top App Store ranking in 15 countries. It also appeared in iTunes Rewind 2010, Apple's selection of the year's best apps. Chaos Ring's story was presented from several character's viewpoints.
The story this time takes place 10,000 years before the events of the first game, and is seen through the eyes of Vieg, a warrior summoned to the Ark Arena. The game systems and story have been enhanced for this version, making it the height of RPG gaming in iPhone.
Source: The Game Website.