Only 2 games come to mind as both dissappointing and overrated:
Final Fantasy XIII:
Battles and cut-scenes with nothing else. It ceased being an RPG. I would rate it lower then the Metacritic average. Interesting characters, but they were not enough to warrant the score it got.
CoD: Black Ops:
Poor single player campaign that barely masked the linearity, poor AI and bugs as well as previous iterations did. Looks and runs worse than MW2. PC version was a laggy nightmare online. The zombie mode, whilst fun feels like a poor man's Left 4 Dead. Whilst the multiplayer is more balanced now, with all the faults and the general lack of polish, I felt it was overrated. Only one publication gave it a score close to what I thought it deserved (although they rated it slightly less than what I would score it), and that was PC Gamer UK.
