Mass Effect 2 among many others (In alphabetical order: Alan Wake, God of War 3, Heavy Rain, Red Dead Redemption, Splinter Cell Conviction... probably more to be added soon).

The game took out most of what I liked about the first game. There was a huge lack of any actual exploration, no inventory system, non-impactful character interactions and story branches, and quite possibly the worst ending to a game in recent memory... well when I think about disappointing endings it's right there with Indigo Prophecy, Condemned, Halo 2/3 and Heavy Rain. Considering ME1 is my fav. game this gen and ME2 is the most hyped I've been for a game since... Halo/Half-Life 2... I've learned (at least for the next few years) not to get my hopes up about anything.

The game got a 9.1 from me solely on its technical merits. It is impressive for a UE3 game and a lot of polish went into it. It's a solid game, but it's not a 9.6 due to lack of an engaging story or atmosphere and seriously lacking on longetivity and replay value for an RPG.

 While I was disappointed with FFXIII, I don't feel like it ever got much hype or praise behind it in the first place to make it qualify as over-rated. By the time I played it my expectations had been lower.

 So er, with that in mind, it gets pretty tough for me to pick a game that I feel was over-rated, but I guess I'm going to have to go for Bayonetta. I did really enjoy the game, but it never took me as a '9/10' type of game, I got too used to just dodging to get slow motion and then battering the enemies. I did complete it on the mode where you can't do that, but I just wasn't as 'into' the combat system as some people seem to be.

SMG2. I actually LOVED SMG, but SMG2 did not grab me as the first one... I didn't buy it, but played it at a buddy's house and concluded I would never buy it.

Also, maybe Bioshock 2, even though I kinda knew that wouldn't live up to the first one, which I absolutely loved.

AAAAND the biggest of them all:

Heavy Rain.. The story, was not actually that different based on your choices. The bad guy was always the bad guy and the story made you think that there could be many different people who could end up as the bad guy given the choices you made. You just finished the game with 1-4 main characters and even some could not actually die. "Pre-hype" led you into thinking there would be MANY different stories, but in reality "there was basically just one", with some different elements to it. I loved the game though, but was very disappointed by the ending and how the story unfolded.

The boring ff13.

Everybody could die in Heavy Rain.  I'm just pointing that out.

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.

The only thing stopping me from trading in BOTH Reach and Black Ops right now is that there is nothing I want to buy with the store credit.

No. One could not die? At least I tried to make him/her fail (not gonna spoil what scenes) and I never could get this person to die. I was very disappointed. maybe the person can die at some stage, but at least not in two-three scenes. I tried, and failed... I don't want to spoil anything, so if you want to talk more, do it on PM.

Halo Reach

Super Mario Galaxy 2.

It revieved such glowing reviews and I think it is sitting at around 97 on Metacritic, but it felt like same ol' same ol in regards to SMG. It never realy "grabbed me" or even "wowed" me at all.

Good game? Yes.

Very overrated? Oh Hell Yeahz.