No need to unlock the ubiquitous Red, as you start with him as your default bird.
Early on in the game, you’ll be able to use Chuck, and all you need to do is to play more levels and win them.
You’ll be able to unlock the Blues once you’ve finished 3-1, which makes them third on the list of Angry Birds characters you can unlock. Once again, there’s nothing much to this, so just play until 3-1, complete it, and the Blues are all yours.
When it comes to unlocking Bomb, you’ll need to get a total of 30 items. These items will be given to you randomly during the course of the game, but typically, you can get items by achieving certain milestones, such as defeating the Pigs for the first time ever, or by defeating a boss character.
You’ll need to be patient if you want to unlock Matilda, as you need to win ten boss battles, or Challenge Battles, to have her join your team.
Now, this is where the social element comes in to play. In order to unlock Stella, you’ll need to have ten friends, and before you can add friends, you have to connect your game to Facebook. But if you don’t have ten friends playing the game, you always have the option to create a gaming account and add friends through the official Angry Birds Fight! page.