Quoted from Dee-Bow:It seems like people vote up the games they own to increase the value of their investment rather than a true gameplay rating..
Or maybe it's just that people buy games they like. I actually own two top 20 games I don't really like because the opportunity came up to get them and maybe I can learn to like them (TSPP & WH20).
Check the Alien comments, i think someone rated it after seeing it & playing it once!
How many people can play Alien multiple times right now? Not very many, unless they go to shows or live very close to one of the very few Alien machines out in the public right now.