Similar to the Turbo Express, this machine is in fact a scaled down Sega Genesis (Megadrive) console. It is compatible with all Genesis games, should also work with the Sega CD, 32x, etc. While not really large across, it sure is thick. I'm talking like five inches. Makes it a little hard to hold. This came out towards the end of the Genesis' life span as a platform for all the companies that had unfinished genesis games to continue with. Unfortunately this thing didn't catch on very well and very few were produced, not to little to make it impossible to find but little enough to keep it at around a $100 price tag. Has an extra controller slot for 2 player games as well as an optional TV turner. I am saving up to get one of these.