Game Description:All Sonic, all the time. This mega collection features 13 of Sonic's early adventures, plus four additional Sega classics. You'll find seven all-time favorites: Sonic The Hedgehog, Sonic The Hedgehog 2, Sonic The Hedgehog 3, Sonic & Knuckles, Sonic 3D Blast, Sonic The Hedgehog Spinball, Dr. Robotnik's Mean Bean Machine, and three Sonic lock-on games (from Sonic & Knuckles). Includes six Sega Game Gear games: Sonic the Hedgehog, Sonic Chaos, Sonic Drift, Sonic Labyrinth, Dr. Robotnik's Mean Bean Machine, and Sonic Blast. And, unlock four Sega Genesis games: The Ooze, Comix Zone, Flicky, and Ristar.