Street Fighter Zero / Alpha: The Prequel Story

Between Street Fighter 1 and Street Fighter 2 lies a gap of several years. Capcom later released a "prequel" series to fill it in — Street Fighter Zero (known as Alpha overseas).

A story that fills in the past

The Street Fighter Zero/Alpha series sits chronologically after the original Street Fighter and before Street Fighter II. There's no official world tournament; instead, it tells of private clashes and grudges between fighters — more of an ensemble prequel.

Because of that, the Zero series has no official "champion" — it fills in relationships, not tournament results.

Nash's sacrifice

The Zero series' most important plot point is the fate of Guile and Nash. In Street Fighter Alpha 3, Nash sacrifices himself to pin down M. Bison and cover his comrade, dying together with the dictator.

This directly explains why Guile hates M. Bison so deeply in Street Fighter II — his revenge began the moment Nash fell.

Evil Ryu: a "what if"

The Zero series also features a fan-favorite figure — "Evil Ryu". This is the form Ryu takes when he fully surrenders to the Satsui no Hado: grey clothes, blood-red eyes, power surging, reason lost.

But note carefully: Evil Ryu is a "what-if" character, a branch of "what if Ryu had chosen the other path", not official canon. In the canon, Ryu keeps fighting the Satsui no Hado and never truly falls.

A completed worldview

The Zero series' greatest value is filling the gap between SF1 and SF2: Ryu and Ken's red headband, Nash's death, M. Bison coveting Ryu's Satsui no Hado, Chun-Li's pursuit — all get their backstory.

To truly understand Street Fighter II, the Zero/Alpha series is essential. It turned Street Fighter's story from a "beat the boss" tale into a full ensemble drama with a real history.