Angry Birds

A famous kids game that created by Rovio.

Angry Birds is a casual puzzle video game developed by Rovio Entertainment. Inspired primarily by a sketch of stylized wingless birds, the game was first released for iOS and Maemo devices in December 2009.

In the game, players use a slingshot to launch birds at pigs stationed in or around various structures with the goal of destroying all the pigs on the playing field. As players advance through the game new types of birds become available, some with special abilities that can be activated by the player. Rovio Mobile has supported Angry Birds with numerous free updates that add additional game content, and the company has also released stand-alone holiday and promotional versions of the game.

Angry Birds was praised 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 mainstream games out right now", "one of the great runaway hits of 2010", and "the largest mobile app success the world has seen so far".

Birds variation: