Storyline
South Island has been peaceful since Dr. Robotnik's defeat. Sonic, bored, decides to go on a journey in search of other adventures. Upon his return, he is shocked to find the island nearly abandoned. The only clue as to where all his friends might have disappeared to is a single note, written by his two-tailed fox buddy, Miles "Tails" Prower. In the note, Tails explains that he's been kidnapped by Dr. Robotnik and is being held in a place called Crystal Egg. The price for Tails' safe return are the 6 Chaos Emeralds, to be delivered to 6 new boss robots. Sonic collects 5 of the 6 Chaos Emeralds, and moves on to defeat a new Sonic robot, Silver Sonic. The robot explodes, and Sonic collects the 6th Chaos Emerald. Sonic goes up to the Crystal Egg, defeats Robotnik and saves Tails.
Read more about this topic: Sonic The Hedgehog 2 (8-bit)