Chaos Rings is a role-playing video game series released primarily on mobile platforms. It is developed by Media.Vision and published by Square Enix. The eponymous first game in the series released for iOS in 2010, then later ported to other mobile and portable platforms including Android and PlayStation Vita. There are currently four games in the Chaos Rings series, and each uses the same gameplay base. Effective May 31, 2016, Square Enix ended distribution of the first three games in the series, leaving Chaos Rings III as the only title still available for download or purchase.