Correct me if I’m wrong (I’ve never left a Steam review before), but isn’t the way Steam reviews work is that you either leave a thumbs up or a thumbs down? There doesn’t seem to be any rating scale. The “score” displayed on this page is presumably based on the ratio between positive and negative reviews, and the only thing it tells you is that about 90% of players aren’t convinced that whatever the game has to offer earnes it a recommendation, not that they all thought it deserved a 1 out of 10.