Let me see, what you want is a XBMC Python script, you run it, search for your game, see people's comments and go through them to vote them up and down, on your TV, presumably. Cause if you were on your PC you could've quickly run a web browser and did the same, no problems
Now, let me tell you what I think - the learning curve to get some Python skills and develop an addon for XBMC is fairly high, and people that mastered those or on the way to do so wouldn't probably waste their time to develop such a thing - I wouldn't see many people needing it, so personally I wouldn't do it. I'm afraid you will have to do it yourself, as Spiff sugested earlier.