Street Fighter II - Hyper Fighting, known in Japan as Street Fighter II Dash Turbo and officially promoted as Street Fighter II Turbo — Hyper Fighting, was released in December 1992 (eight months after Champion Edition). Ever since the release of Champion Edition, arcade operators had been installing various unauthorized, hacked modifications into their machines to make the gameplay faster and to allow for additional moves. In response, Hyper Fighting increased the game speed and added new special techniques in order to make Capcom's official release more interesting while restoring the balance of the gameplay that was missing in the unauthorized hacks. All of the characters received new color schemes, with the new scheme becoming the default and the original color scheme as the alternate for all characters except M. Bison, who still used his original color scheme as the default and the new scheme as the alternate.