A true, classic Sonic experience: Gorgeous pixel graphics featuring a variety of new Zones with iconic favorites from Sonic 1, 2, 3, Sonic & Knuckles and Sonic The Hedgehog CD Definitive version: Pixel-perfect HD visuals, 60 FPS gameplay and all new content in one package! Join Sonic and his friends as they face off against Dr Eggman and his new robo-henchmen the Hard Boiled Heavies New playable characters join the fun with Sonic: Seen in past Sonic titles, Mighty the Armadillo and Ray the Flying Squirrel join the Mania each with their own unique abilities!All-new Encore mode: A new mode that adds a fresh look to familiar locations while challenging new and veteran players alike New and improved features including Competition mode.