Sonic Generations (ソニック ジェネレーションズ Sonikku Jenerēshonzu) is a 2011 platformer video game developed by Sonic Team and published by Sega for the Xbox 360, PlayStation 3, PC, and Nintendo 3DS.
Produced in commemoration of the 20th anniversary of the Sonic the Hedgehog series, the game follows Sonic and Tails as they form an alliance with their past selves to stop an evil entity from erasing all time. It features two gameplay styles: "Classic", which plays from a side-scrolling perspective like that of the original Sega Mega DriveSonic games, and "Modern", 3D levels similar to those in Sonic Unleashed and Sonic Colors.
The Japanese version has different subtitles, White Time and Space (白の時空 Shiro no Jikū) for the home consoles, and Blue Adventures (青の冒険 Ao no Bōken) for the 3DS version.
