While it wasn't the best looking game at the time of its release, it had, without a doubt, the best fighting system to grace the genre by 1991. A massive improvement over the first game, offering more and varied characters to pick from, a fantastic soundtrack, and a combo/fighting system that would go on to influence hundreds of games for decades to come. I'm pretty sure this game singlehandedly extended the life of the Arcade to say nothing of its impact as a cultural phenomenon.