Small Arms, a shooter/brawler Xbox Live Arcade title due out later this year, has implemented a new kind of achievement.  The achievement is titled “Six Degrees of Small Arms” and will spread through Xbox Live in a viral fashion.  When the game is released, only four members of Gastronaut studios will have the achievement.  The achievement will spread to anyone they play, and from that player to other opponents, and so on.  This is an example of a great Xbox Live achievement and is miles ahead of the “get on the leaderboard” achievements we have been seeing so much of lately.