Street Fighter IV was a popular fighting games created by capcom that come first to PS3 & X360 before come to PC.
Also the online mode was bad on PC because everyone connections was not really good and makes it laggy and unenjoyable. Almost forgot that you need a Games For Windows Live(GFWL) key to play online mode.
Also there are challenge mode that divide the challenge to time attack(defeat enemy before times run out) and survival(defeat enemy until the end) to unlock extra costume and personal actions that i think was innovative challenge mode really pushing my fighting skill to the limit. In the end Street Fighter IV was a good game with a plenty of challenge in it.