Well... Sonic 06 is bad because of gameplay issues and bugs most of all. The game looked great otherwise.
Unleashed is pretty awful. I got that game for one day before i sold it. Shadow, despite the dumb premise of guns, was actually a decent game. Loved how it had so many stages and how you could replay it and go with a almost completely different set of stages. It was also cool to see a new villain besides Eggman.
I guess i would say unleashed. It was modern Sonic stages with werehog stages. So, bad with awful. There was nothing good in that game for me. Even if it went 2D on some bits, it was just terrible.
I never played the Wii games though. Dunno how bad they were.
I guess some people might refer Sonic R or Racers/ZG/FR or even Sonic 3D. I thought despite flaws they were enjoyable. FR i never played and i hear its completely unresponsive. I suppose its a similar situation to Sonic 06.
