It's generally based on how most reviewers use a 5-10 system, or a 6-10 system for reviewing games, and for those, any score under 5 or under 6 is just dramatic effect to signify how much of an abomination this game is.
We need more free thinkers (at least in terms of setting a scoring system) like GiantBomb or 1up. Their scores always fuck with metacritic, like GiantBomb's 3/5, which is still a decent score in their eyes, becoming a "zomg! horrible!" 60% on metacritic, helping to devalue that system further.

Monster Hunter: pissing me off since 2010.







