Tony Hawk's Pro Skater has got to sport the best replay value of any game on earth.  Its great because you don't have to be a fan of the sport to play  this fantastic skate boarding game.  Play in many different enviornmets,  like skate parks for example with ramps, rails and pools to all perform  fantastic high air tricks.  Its also nice because the learning curve is not  too great.  I picked this game up and was jumping off ramps, spining, board  kicking and sliding down rails in no time.  I just can not stop playing  Tony Hawk's Pro Skater, I think I may need profesional help!