Angry Birds begins with a compelling and simple storyline: the evil green pigs have stolen the eggs of the red birds. This theft sets the stage for the birds' mission to reclaim their stolen eggs. The game unfolds through a series of levels, each presenting a new challenge for the player.
In each level, players are given a set number of birds, each with unique abilities. Using a slingshot, the player launches these birds at structures made from materials like wood, ice, and stone, where the green pigs are hiding. The objective is to eliminate all the pigs by either hitting them directly or by causing the structures to collapse, which can result in the pigs being crushed or otherwise defeated.