The image you see above represents an entire year of gaming tweets. It was generated by the Aggregame service, which offers a real-time feed of game-related messages from Twitter, and shows the 150 most used words, collected from more than 28 million individual tweets from July 2009 to July 2010. As you can see, most gamers overwhelmingly tweet and re-tweet about the three major consoles.
As for individual games, Modern Warfare 2 and Halo most frequently appeared among 140 characters or less, though World of Warcraft, Uncharted, The Sims and Mario seem to have enjoyed their share of shoutouts. Check out a high-res version of the chart at Aggregame, or simply click past the break to see the saddest thing ever.