Street Fighter II was released for mobile phones in 2004. I've never played this version, and I imagine this version is hard as hell to play though since mobile phones don't tend to be very good for doing hadouken motions on. I've also heard that there are two different versions of this game: one released in 2004, the other in 2006. I think the 2006 one might remove the black borders around the energy bars, but that is the only difference I know of.