This is a cancelled version of Street Fighter II Champion Edition, it may have been one of the final builds of the port before it was cancelled by Capcom.

Many parts of previous builds seem to have been modified in a clean manner. This suggests that the person(s) that modified this build had access to the source code to do these changes, as most bootleg hacks are much more rough around the edges.

Despite being titled "Street Fighter II Turbo", the only feature borrowed from the Turbo version of Street Fighter II are the alternate skins/costumes palettes.