Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. 12Riven the climinal of integral is a Japanese visual novel developed by KID, Cyberfront, and SDR Project and that was released on March 13, 2008 for the PlayStation 2. There is a regular edition, and a special edition which included the game's original soundtrack. KID are known for producing the Memories Off series, and the infinity series which includes Remember 11: The Age of Infinity and Ever 17: The Out of Infinity. When KID declared bankruptcy in November 2006, production on the game was halted until Cyberfront took over and resumed production.