This SEGA CD version of "NBA Jam" is almost identical to the Sega Genesis port,that was released a year earlier prior to this version. The graphics are pretty much the same. The only slight differences are updated team rosters,CD stereo sound,a couple of short FMV clips during half time and an unique,more complicated way of entering passwords for hidden characters. Other than those differences,this is exactly the same game as the Genesis version. Just like with the SEGA CD version of "Mortal Kombat",I remember being kinda let down when I first got this back in 1995. My high expectations for digitized arcade-like graphics were destroyed,upon playing this SEGA CD port of "NBA Jam".Not that this is a terrible game or anything. It's not. But overall,if you still have your Genesis copy of "Jam",then buying this isn't really all that necessary.