Simply head over to the PS Store now and hit up ‘View Product’ and you will see the current game rating and the option to view a detailed breakdown of its core. This reveals how many ratings a specific game has received from users, as well as a percentage breakdown for the amount of votes for each 1 — 5 score. You’re free to score a game yourself, but only if it’s been added to your library, purchased, or downloaded.
One thing that springs to mind with this sort of thing is review bombing, which sadly happens in just about any type of rating system these days – just look at the user ratings on Metacritic, for example. Still, it’s good to have a rating system on the PS Store regardless.
[Source – The Gamer]