That depends on how you calculate the average. The mean is one such method. What you've described there as the "average" is closer to the median, which is another method.hermes said:That is not how averages work. Averages only mean they are above or below most values of the scores. If most games were scored a 7/10 (relatively common in today's sites), a game that scores a 6 is "below average", and a game that scores a 9 is "above average". The only way 5 is considered the average value is in a uniform distribution, where every value in the scale is equally likely to be the score of a game (without seeing it), like scoring a game by throwing a dice.

Games scores are closer to a mean distribution, because no one scores lower than a 6 or 7 unless they are a steaming pile of crap, the value 6 or 7 comes to mean mediocre (nothing particularly memorable, nor particularly infamous about it). Again, that doesn't mean 7 is the mid value in the scale, just that it is the average because all values aggregate around it.

Both means and medians are alternative methods of calculating the average.