While nowhere near as good as Sonic 2,Sonic and Knuckles is better than it's predecessor. The plot is basically Sonic 3 continued,with Sonic and Knuckles looking for the lost Chaos Emeralds. However,Dr. Eggman is looking for them too,so he can use their power to fly the Death Egg. The graphics are noticably better,and playing as Knuckles is fun beyond belief. The music is awesome,with some tunes that you are glad stick in your head. Overall,this was definetly the last good Sonic Genesis game. This was Sonic in his last 2D triumph.