Faithful to the Genesis/MegaDrive original but with plenty of bonus features and quality of life improvements! By far the definitive official way to play Sonic 2! The only gripe I have is that you have to be online. It makes sense for the free version (so you can't just turn off your WiFi to get rid of ads), but it does not for when you remove the ads. This isn't enough to lower my score though, as this is an issue with the Sega Forever line-up as a whole.