From SEGA: Take a trip back in time with over 40 titles from the SEGA Genesis era, including your Sonic The Hedgehog favorites. In classic single-player and multiplayer battles, you’ll take down a huge variety of enemies, including Sonic’s nemesis Dr. Eggman (AKA Dr. Robotnik), shuriken-flinging ninjas, hordes of altered beasts and the world’s greatest fighting champions.