I believe a lot of people in this thread appear to be mistaking 'selling well' for overrated.
There are certain franchises that sell very well, but their games are not generally seen as masterpieces. Those are not what this thread's about. This thread is about games that are viewed and scored (by some) as masterpieces/AAA games while they're really not as fantastic as these people make them out to be. An example of this would be GTA4, which was on release lauded as 'game of the forever', garnering 100%'s left and right, while really, in hindsight, the game wasn't all that, in a lot of people's opinions.