, sometimes abbreviated DDR X2 or simply X2, is a music video game, and a part of the Dance Dance Revolution series. The arcade version of DDR X2 was revealed by Konami on November 20, 2009. A sequel to the Dance Dance Revolution X, X2 began public beta testing on November 25, 2009. The game was released in Japan & Asia on July 7, 2010, United States on December 31, 2010, and Europe on May 13, 2011