Chaos Rings (ケイオスリングス Keiosu Ringusu) is a role-playing video game developed by Media.Vision and published by Square Enix. It was released worldwide on April 20, 2010 as an exclusive title for iOS, but it was later ported to the Android platform in Japan. Produced by Takehiro Ando, characters were designed by Yusuke Naora, the art director of Final Fantasy VII, VIII, and X among other successful titles. The game takes place in a mysterious place known as the Ark Arena, where participants face enemies in both dungeons and tournament-play to avoid death and gain immortality. Chaos Rings features four scenarios. Each scenario is played by two different story characters and across several worlds. The prequel, Chaos Rings Ω, was released on May 19, 2011, the sequel, Chaos Rings II was released on March 15, 2012, and the second sequel, Chaos Rings III, was released in Japan on October 16, 2014, and It released worldwide May 28, 2015.