Street Fighter II Turbo included changes from ''Champion Edition'' as well as the ''Turbo'' arcade incarnations, and was a major step up from the original version previously available on the SNES. All four boss characters became playable. Players could choose the same character to fight against each other, using alternate colors to differentiate the second player. The backgrounds of each player's stage were re-colored. The ''Turbo'' upgrade introduced faster gameplay. The default turbo level was '3', but could be bumped up to '4' by default or even '10' with a special code. Many characters gained new moves, and several that could now be performed in mid-air.