Street Fighter EX2 sounds nothing like what you'd expect from an SF game and that's exactly why it rules. Arika's composers went wild on this one, mixing early PS1-era synths with surprisingly melodic composition. "Passage of Lotus" has this contemplative, almost spiritual quality that you'd never associate with a fighting game.
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"Arabesque" for Pullum Purna brings Middle Eastern flair with a playful bounce that's ridiculously catchy. Then "Crash Power Plant" hits with aggressive industrial energy. The whole EX subseries lived in Capcom's shadow and never got the respect it deserved, but the soundtracks were consistently doing their own thing.
Worth it just to hear what happens when Street Fighter goes fully off-script.