Sonic the Hedgehog 2
Sonic’s first outing for the Sega Genesis was a phenomenon, but his second game was when things really picked up for him. An easily activated spin dash allowed players to quickly re-establish momentum, and the introduction of Miles “Tails” Prower brought a powerful new dynamic to the game. All of a sudden, players could play with a friend, even if they wouldn’t yet have the ability to lift Sonic and fly him about. The game’s soundtrack is also extremely memorable, and stages like “Chemical Plant Zone” still standout as some of the series’ best.