Review:

Sonic Generations is based on a back in time situation of the where sonic must meet up with his past self when this new enemy creates multiple time holes everywhere to destroy the time stream (space time continuum). On this new Sonic The Hedgehog 20th Anniversary Video Game, you can either play as Classic Sonic or Modern Sonic. Each stage has different courses which takes them back from three eras, Classic Sonic is 2D Dimensional with scrolling slides with the special attacks including the spin attack, and spin dash to make your way to the sign post. While Modern Sonic stages follow a gameplay style similar to more recent games using 2D/3D gameplay featuring, Homing attacks, Sonic Boost, Sonic Drift, and Quick Steps from Sonic Unleashed and Sonic Colors. Also there's a 3DS Version with the gameplay from Sonic Rush. The 3DS version has special stages, and multiplayer versus mode. So the game will be different from PS3 and Xbox 360. The Demo For PlayStation 3 and Xbox 360 you will only be playing as classic sonic in Green hill Zone, while the 3DS version has Classic and Modern Sonic in Green Hill Zone with only one Boss: Big Arms from Sonic The Hedgehog 3. Sega is also thinking about putting Sonic Generations on a PC version. In Story Mode Sega stated that Story Mode for PS3 and XBOX 360 that Classic Sonic will be speechless throughout the game. Sonic Generations will be released on November 22, 2011 for Xbox 360, PlayStation 3, Nintendo 3DS, and PC maybe. In the picture below, both Modern and Classic Sonic designs will appear in Sonic Generations. And again the Sonic Generations demo will end on July 12, all downloaded copies will be disabled.

if u have a PS3 or X360 u can download the demo its even better than the Sega Genesis

Well you're gonna like this they also said they were coming out with a PC Version. How Awesome is that?!