I don't get why all these reviews are so high; I mean, I know I complain about certain TV channels who have a ***** for certain games, but what's the point of having a scale of 0% to 100% if everyone scores 80-100? It's almost like the no child left behind thing has made its way into the entertainment industry; if I had to guess, I'd say that maybe reviewers are scared of giving a game they don't like a negative review for fear of either fan or company backlash. First off, if you're grading on a scale of 0-100%, then no game should ever get a 100%, because there's no such thing as the perfect game. Few games should breach the 97-99% barrier. Most should sit in the 80-95% realm if they're good/great, the 'meh' games should be in the 70-80% range, and the bad games should have 69% or lower. There's no reason to grade 0-100% if you can't provide examples of games that scored in the 30-50% range or lower and why.
Well generally if a game is so bad that it would get less than a 70% score from more than a few outlets, it just gets ignored. The best revenge is contempt, or is it apathy? You can go on Steam and look at the meta scores there and there are a LOT of 50s and 60s that you've probably never even heard of because no one is going to waste shelf space or page space talking about a game that is probably not going to appeal to any one.
The only way to hear about a really bad game is if it is a highly anticipated really bad game (like Daikatana). There aren't too many of those.