Street Fighter II Turbo: Hyper Fighting is a competitive fighting game released by Capcom for arcades in 1992. It is the third arcade version of Street Fighter II, part of the Street Fighter franchise, following Street Fighter II: Champion Edition, and was initially released as an enhancement kit for that game. Released less than a year after the previous installment, Turbo introduced a faster playing speed and new special moves for certain characters, as well as further refinement to the character balance.

Turbo is the final arcade game in the Street Fighter II series to use the original CP System hardware. It was distributed as an upgrade kit designed to be installed into Champion Edition printed circuit boards. The next game, Super Street Fighter II, uses the CP System's successor, the CP System II.

Turbo features faster playing speed compared to Champion Edition. As a result, the inputs for special moves and combos requires more precise timing. The faster playing speed also allowed players to get into battle quicker, as well as to react quicker. All of the fighters, with the exception of Guile and the four Shadaloo Bosses, were each given at least one new special move.

Each fighter also received a new default palette. The original palettes are now featured as alternate palettes for each character, replacing the ones that were in Champion Edition. The only character exempt to this change is M. Bison, who retains his original default palette, but still gets a different alternate palette.