Champion of Champions is one of the first hacked SF2' versions. When you throw a Fierce Hadouken with Ryu or Ken it goes down hitting the opponent in the feet, unless you are in the air. A medium Hadouken goes up and hits them if they jump. A weak Hadouken goes extremely slow, you can walk past it, perform other moves and then it hits them out of nowhere. Ryu's weak Dragon Punch floats like Ken's fierce Dragon does, but stays on the ground. All of the charas have been hacked slightly, but for the better.
This is my favourite hacked version of SF2' as the hacks are not unfairly stupid like when 10 fireballs come out if you do a Dragon punch, or you begin each round floating in the air as with other hacked versions. The game is as good as the original SF2' to play.