Of all the Sonic games,this is the one that will always be my favorite. While this one kept the elements of Sonic the Hedgehog,it also improved on it. Of course,it also introduced everyone's favorite flying fox,Miles Prower AKA Tails. The story is fun. Dr. Robotnik is kidnapping animals again,while on a search for the Chaos Emeralds so he can activate his ultimate weapon,the Death Egg! Sonic is on a quest to stop him,accompanied by his new friend Tails. The zones are BIG!My definate favorite is Metropolis Zone. The music is great,definately better than the first Sonic game. The best new addition is the Spin Dash. You should definately get this game for your Genesis! You will love it.