After the success of Sonic 4, Colors, and Generations, this is a big disappointment for Sega’s speeding blue bullet. Eggman's Eggventure clumsily tears all the wrong pages out of the Super Mario Galaxy playbook, and in so doing, loses the breathless speed and fluidity that makes a Sonic game a Sonic game. Graphically it may talk the talk, but the controls and level design just can’t walk the walk, much less run it.
for the full review, head on over to IGN.com