Gamasutra.com was able to catch Capcom's Chris Kramer for an interview about the Street Fighter franchise and it winds up being a fairly informative piece.There were even a few of what Capcom considered "knock-offs." In 1994, Capcom attempted to sue developer Data East, attempting to prove the latter's 1993 Fighter's History was too similar to Street Fighter II (though the court sided in favor of Data East).
Explains Kramer: "Part of the lawsuit was, we took a joystick and we split the controls and wired it to a Street Fighter board and showed that literally, [Fighter's History] ripped off all the moves in Street Fighter, all the same inputs."
"You need an awesome game," he says. "And then it definitely helps to have a brand that's recognizable." Capcom is thrilled with the performance of Street Fighter IV, which has sold twice as many copies as the last three SF games to hit consoles combined.