Street Fighter EX
A few months after the original version of "Street Fighter EX" was released, an upgraded version titled Street Fighter EX Plus was released in arcades on March 31, 1997. In this version, all of the hidden time-released characters are available by default. This version also adds four new hidden characters, increasing the total number of characters to 21: Evil Ryu from "Street Fighter Alpha 2", an alternate version of Hokuto named Bloody Hokuto, and two cyborgs named Cycloid-β and Cycloid-γ.