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) In January 2012, Angry Birds was released for devices using Bada OS. In February 2012, "Angry Birds" made its official debut on Facebook. It is known as "Angry Birds Friends" since May 23, 2012. The version launched with two chapters from the original game, along with then exclusive "Surf and Turf" chapter. The Facebook version adds a number of new power-up items, with a maximum of two in use per level. For example, the Super Seeds power-up will make the launched bird larger and thus more powerful, while the King Sling power-up makes the slingshot stronger and able to launch