if you be go to buy a Dreamcast , you should probably make this you first game . very fun and fast gameplay , and interesting storyline . you explore in huge area call adventure stage to find action sage , where you destroy enemy and complete one of the three objective . the first one ussually be to get to the end of the stage , second , do that with 50 ring usually , and third , complete the stage in the time limit . this , of course , be as Sonic . there be 5 other character to unlock along the way with different objective for the stage . also , there be a virtual pet part that you can feed they and do other thing , then put the on you memory unit to play with separately . this provide hour of fun . the graphic in this game be stunning , and the music be awesome and set the mood in the stage . this be a great game .