You cannot talk about classics and not mention Sonic the Hedgehog 2. Released in 1992, Sonic the Hedgehog 2 is the successor of Sonic the Hedgehog and is the second best-selling Genesis game of all time.
A new character named Miles “Tails” Prower was also introduced in the game as Sonic’s comrade. The game revolves around Sonic and Tails who go on a quest to prevent Dr. Robotnik and his army of robots from looting the seven Chaos Emeralds. The antagonist Dr. Robotnik is a wicked person who requires Emeralds to fuel Death Egg that is his power station.