Sonic 06. I think the worst thing about it is that it could have been a great game if Sega had taken extra time to actually finish it instead of rushing it out the door in an unfinished and borderline unplayable state just so it could be released before the end of 2006 (the game already missed the actual date of Sonic’s 15th anniversary anyway, so what was the point of selling it as an anniversary celebration at that point?). I’d love to see Sega remaster the game for a future generation of consoles, and more importantly spend as much time, money, resources, and effort as possible on polishing it and working all the glitches and bugs out BEFORE releasing it, so it can be a solid, well-rounded playing experience.