Deguello on 22 June 2007
FPS are surprisingly simple to put through Online. All it is, is bullet trajectories and if they meet the other characters or not. Fighting games are decidedly more complex, what with the fierce timing required for high level play. Smash Brothers will hide this because Smash Brothers is fun even if you lose to lag or a cheap item. It's supposed to be unorganized chaos to begin with.
