Yes, you can buy individual games.  I think most games have several different levels or variations you can play.  We haven&#39;t boguht any disks other than the ones that came with it.  My son did buy MarioKart which is a driving game and he and Greg were playing it at his house, so I am going to get it for Greg.  I guess &#036;500 may seem like a lot but it is endless hours of fun&#33;&#33;&#33;  And the exercise benefits are priceless - do I sound liek a commercial or what????