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.
First day of progress on Cool Edge. While the bobsleigh is a bit impossible to bring back, most of those sections will be reimagined as snowboarding sections. It looks like it'll work well and be lots of fun when polished!