Valve has announced Steam Reviews. Steam Reviews are different from the current system of your friends recommending a game because everyone can see them. Users can rate reviews up to increase their prominence on a product’s store page. While these reviews do not contribute to an aggregate score now, Valve does plan to implement some kind of overall scoring process.
Q. Do these written reviews create an overall score or rating for a product?
A. Not yet, but we are looking to add that during the beta. Many products on Steam change significantly over time as the game or software is updated and new content is added. In order to form a score that accurately reflects the current state of a product, we first need to gather and evaluate the data from reviews.
Developers will have the opportunity to flag reviews as offensive, in which case they will show up in a “collapsed” form until a Steam moderator can look into the complaint. Wait until developer payouts from publishers depend on their Steam reviews!