Finnish game studio Rovio went from relatively unknown to center stage with the Angry Birds franchise. And in record time, too -- the first Angry Birds landed on Apple's iOS App Store in December 2009, less than three years ago, and has since become an international sensation. The birds spawned a flock of sequels, branded tie-ins, and tons of merchandise. All this adds up to quite a bit of chicken scratch for Rovio, and also quite a bit of pressure to keep the money train rolling. Today marks Rovio's first true sequel to the original Angry Birds, and it's focused on the other side of the fa
