Sonic Generations

Sonic Generations is a 2011 platform game developed by Sonic Team and published by Sega for the PlayStation 3, Xbox 360, Windows, and Nintendo 3DS. Produced in commemoration of the 20th anniversary of the Sonic the Hedgehog series, the game follows Sonic and his sidekick Tails as they form an alliance with their past selves and travel through levels from previous Sonic games. It features two gameplay styles: "Classic", which plays from a side-scrolling perspective like that of the original Sega Genesis Sonic games, and "Modern", 3D levels similar to those in Sonic Unleashed (2008) and Sonic Colors (2010).