Sonic X Shadow Generations has given fans a possible tease towards another playable character in the Shadow Generations campaign. Sonic X Shadow Generations is an updated re-release of the original 2011 anniversary title. Not only is the original game getting a graphical and 60 FPS enhancement, but additional gameplay features like Chao rescue missions are being added. The biggest talking point surrounding the game, however, is the second half of this re-release: a brand-new single-player campaign starring Sonic's anti-hero rival, Shadow the Hedgehog.