Battle swarms of hundreds of zombies - the Swarm Engine seamlessly renders hordes of zombies in incredible firefights. Advanced gore systems offer gruesomely satisfying action.
Coop story-driven campaigns - survive around the world, as unique groups tell their stories of perseverance.
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!