They aren't
No source, there can't just be imaginary writers making the script for the game.
Oh this is crap.. I mean, this is awesome.. Screw that. I wanted to say the CG art in "cutscenes" is awesome, but it's CRAP, that there aren't any normal cutscenes. Does that mean there isn't even a CG opening as well? 
The only Modern Sonic games to really have much effort put into them are Sonic Unleashed(HD and SD) and Sonic Colors. Sega loves their cash cows.
Edited by SuperClassic, 01 November 2010 - 05:53 PM.