The Unleashed Project is a Mod created by the Sonic Retro Community that allows you to play the Daytime levels of Sonic Unleashed with the Gameplay style of Sonic Generations.

Since the PC version's release, the game spawned a massive modding community that is still going strong to this very day.

The PS3 version even allows you to use your own playlists.

You can replay levels with different background tracks.

When you encounter them, Classic Eggman points out that no one calls him 'Robotnik' anymore.

Despite the continuity issues detailed below, Sonic '06 is actually represented well here, with Crisis City being a well-designed stage (with a better version of the car carrying tornado at the end of Act 2), and a much better rival battle against Silver.

All stages are callbacks from previous games in the franchise, adjusted both for Modern and Classic Sonic, same with the boss battles.

Each level is divided into a classic 2D stage and a modern 3D stage.

Another example is the troll goal post in Classic Crisis City.

Great funny moments, an example, if you first beat Modern Sonic and then play as Classic Sonic, the characters that you save will play their role like before but will say something funny about Classic Sonic's appearance.

Incredibly detailed and beautiful graphics.

It features both Modern and Classic versions of Sonic as playable characters.

Sonic generations 2d level