This unofficial project ports back most of Sonic Unleashed's day levels from the Xbox 360 version into Sonic Generations on PC. It also includes any improvements that are deemed as necessary to accomodate to the better control scheme, higher resolution graphics, and a much smoother framerate.
deez nuts
Simply brilliant work. Simply the fact that this ports all of the *good* stages from Sonic Unleashed into Generations, as well as the difference in platform, is already a big plus in my book, but this also improves upon the original stages, such as fixed textures, not needing to play as the Werehog and collect medals to progress, 60fps (assuming you have the specs of course) and Generations' updated physics shows that everyone on the team truly put all their effort into making this a brilliant and polished mod, especially considering this was created by fans.