Back in Time: Street Fighter II

Oh, that game took from me hours and horus of my time. Is a sub-series in Capcom's Street Fighter franchise of competitive fighting games, originally released as coin-operated arcade games. The Street Fighter II series started with the original Street Fighter II game itself, released in 1991 as a sequel to Capcom's 1987 fighting game Street Fighter.

Street Fighter II improved upon the many concepts introduced in the first game, including the use of command-based special moves and a six-button configuration, while offering players a selection of multiple playable characters, each with their own unique fighting style and special moves.

Street Fighter II follows several of the conventions and rules already established by its original 1987 predecessor. The player engages opponents in one-on-one close quarter combat in a series of best-two-out-of-three matches. The objective of each round is to deplete the opponent's vitality before the timer runs out. If both opponents knock each other out at the same time or the timer runs out with both fighters having an equal amount of vitality left, then a "double KO" or "draw game" is declared and additional rounds will be played until sudden death. In the first Street Fighter II, a match could last up to ten rounds if there was no clear winner; this was reduced to four rounds in Champion Edition and onward. If there is no clear winner by the end of the final round, then either the computer-controlled opponent will win by default in a single-player match or both fighters will lose in a 2-player match.

Street Fighter II — The World Warrior

Street Fighter II — The World Warrior is the first iteration of the Street Fighter II series, released in March 1991. The game features all the basic features that would be carried over to subsequent Street Fighter II editions. This version featured several bugs, such as Guile's infamous "invisible throw" and "Golden Stance".

Street Fighter II′ - Champion Edition

was released in April 1992. It was the first of several updated versions of Street Fighter II (hence the Japanese title Street Fighter II Dash, a derivative of the original Street Fighter II). The main difference with The World Warrior is the four boss characters from the former becoming selectable characters (thus expanding the selectable roster to twelve), and alternate color schemes being introduced so that two players could face off using the same character. Also, much of the gameplay was revised to balance the characters out. Additionally, while in The World Warrior, matches could go up to ten rounds if there is no clear winner (at which point the game made the player lose by default); starting with Champion Edition, this was reduced to four rounds. Additionally, this was the first game to begin to differentiate Ryu and Ken's moves. The game speed of the arcade Champion Edition is slightly increased from that of The World Warrior, hence the "Dash" moniker.

Street Fighter II′ - Hyper Fighting
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.