This game is brilliant, this might be recency bias but i think this is the best 3D sonic since Unleashed, ive sen a lot of reviews saying that the shadow portion is too short, and yeah it is pretty short, but so is most sonic games, a play through from start to finish is roughly 4 hours, which isnt much longer than base generations, so you are basically getting double the amount of content. Which is a hell of a deal, and the shadow portion it's self might ust be better than base generations, the level design is unbelievably varied and the game is beautiful, the game is short but feels needlessly replayable, a strength shared with generations. 9/10