Angry Birds is probably the most popular mobile phone game of the last year (read comedian Paul F. Tompkins' take on it). In the game you launch a variety of birds at a variety of buildings in order to destroy these green pigs and reclaim your eggs. Or something. It's strange but it's a lot of fun, in part because it's so challenging. But now players can get an extra advantage in the game by purchasing a new character, the ultra-powerful Mighty Eagle, for an additional fee. We've seen this in games before: the game is cheap or free (Angry Birds costs $3) but upgrades cost extra. They hook you, then they reel you in.
Here's the video that previews Mighty Eagle: