Here's a tough one:
How about adding a list of all game ratings that each member has made to their information page? It could easily be cross-referenced so that a visitor to any given game's listing page could click on the "rate game" link and be given access to who voted and what their vote was. Clicking on those names could take them to that user's information page which would list every other game this user voted on and what scores they gave them.
This is sort of like a movie site rating system and allows people to become true critics. If you've played a game that one particular player rated as 5 and you agreed, you may also want to check other games this player rated as 5 and in the distant future, this could be listed on another separate page. On the other hand, it could also "out" those people who are running around and voting every game but their favorite as a "1".