Alpha Counter (アルファカウンター, Arufa Kauntaa) is a maneuver first introduced in the Street Fighter Alpha series.
|Street Fighter Alpha series||+ / when blocking|
Alpha Counters are performed by executing a quarter-circle forward motion (specifically a "9-to-6 o' clock" motion) and pressing either kick or punch while blocking; if done properly, the user will block their foe's attack and counter with a predetermined special attack.
In the original Street Fighter Alpha, each character would use either the punch or kick button, depending on the character in question. In Street Fighter Alpha 2 and 3, all characters use both buttons, with one corresponding to high attacks, and the other to low.