Angry Birds HD offers 6 levels of bird launching gameplay. The levels vary from a sunny island to a dark cave. All of them are already unlocked and you can play any level that you want. Your mission is to hit all the piggies by launching birds. Each bird has a special skill which you can use in mid-air. You only have a limited number of birds to launch, so you need to think about how you launch them. Try your best to get 3 stars for each level!.