It seems to me that we have been seeing a new trend in PC gaming recently. One one side, we have the old established juggernauts of old, companies like Epic, id and Blizzard, who churn out massive new games every 2-4 years. One the other, we have casual games so simple and innocent as to border dangerously on the vapid, often delivered in the form of a Flash application somewhere. But, in between the two, we are seeing an entirely different class of game, rapidly gaining ground at a surprising pace.