The world of Sonic plunges into Chaos when an unknown energy creates time rifts, sending Sonic and his friends back to the past. He then meets Classic Sonic, his double as he appeared in 1991.
Modern Sonic and Classic Sonic then form an alliance to defeat this strange new enemy and save their friends, while seeking to uncover who is behind this diabolical plan?
Spanning three eras, retracing twenty years of Sonic's history in video games, Sonic Generations offers immediately recognizable game levels, reworked in High Definition, each playable in both classic version - viewed from the side in two dimensions - and in 3D, as in Sonic's latest adventures.
Each incarnation of Sonic in Sonic Generations will feature the characteristic special moves that built his reputation, such as the Spin Dash and Spin Attack for Classic Sonic and the Homing Attack and Sonic Boost for Modern Sonic.
An innovative interactive menu system will allow for total immersion in the world of Sonic, revealing new characters and hidden treasures as the game progresses.