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) by critics for its success for leveraging a combination of addictive gameplay, comical style, and low price into a viable franchise with long-term potential for profit. The game's popularity has led to the production of additional versions of "Angry Birds" for personal computers and gaming consoles, as well as a market for merchandise featuring its characters, a feature film and several seasons of television cartoons. With the "Angry Birds" series having a combined tally of over 2 billion downloads across all platforms as of January 2014, including both regular and special editions, the game was called "one of the most