Angry Birds (video game) crates and rocks are incorporated into the structures, and power-ups may be used to enhance the birds to attack hard-to-reach pigs. Also in the levels, players can unlock bonus levels by collecting golden eggs. There are several different types of birds used in the game, distinguished by their color and shape. In the earliest levels only the basic red bird is available. As the player advances through the game additional types of birds become available. Some birds are effective against particular materials, and some have special abilities that may be activated by the player while the bird is airborne. For
Angry Birds (video game) On June 23, 2015, Flock Favorites was added with 15 levels inspired by previous episodes. On December 11, 2015, in honor of Angry Birds 6th birthday, new 15 levels were added to Birdday Party. On December 11, 2016, in honor of Angry Birds' seventh birthday 15 more levels were added to Birdday Party. On May 16, 2017, a dual virtual currency system was added to the game, in which currency is earned throughout gameplay (or accrued through in-app purchases) and can be used to purchase power-ups and other in-game items. Since its initial release for the Nokia N900 multimedia Internet