Chaos Rings Omega (ケイオスリングス オメガ, Keiosu Ringusu Omega) is a role-playing video game for iOS, Android, and PlayStation Vita developed by Media.Vision and published by Square Enix. Chaos Rings Ω was available on the App Store on May 19, 2011. Effective May 31, 2016, Square Enix ended distribution of this title on the AppStore and Google Play, where it is no longer available for download now except for on Amazon App Store. It is the prequel to Chaos Rings.