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In Birdie's stage there is graffiti of the former Capcom USA VP of Sales and Marketing, Bill Cravens.
Contributed by ZpaceJ0ck0
There's unused audio in the game files for a "Fire Kick", along with unused graphics that suggest Ryu and Ken were planned to have a fourth special move.
Contributed by MrConnman123
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Capcom released a "Deluxe Version" of the game's original arcade cabinet which featured pressure sensitive pads. Players would have to punch the pads in order to execute attacks, and the game measured the pressure applied to result in light, medium or heavy attacks. These machines were often subject to heavy wear and tear due to the nature of hitting the machine.
Contributed by MrJohnnyOTGS
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When ported to the TurboGrafx-CD, the game was renamed "Fighting Street".
Contributed by ABOhiccups