And, no, 3/5 does not translate to 6/10. A 3/5 stars film, hotel, or restaurant is universally accepted as being good while 6/10 is considered a D by most standards.
This is a slight of hand. Because critics are not afraid to use zeros and ones, hotel and film ratings tend to vary a lot more than videogame ratings. Thus a three star hotel will be stylish, comfortable and clean and most three star movies will still be enjoyable. But most videogames that are 3 star equivalents (or 60%) are shit.
Videogame reviews do not effectively use the entire rating system. As an example, out of the 112 average scores for 2008 Xbox 360 releases on metacritic, only 12 are rated under 50%. The median aggregate score is 72.476%!
