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}} ''Angry Birds'' is a puzzle video game developed by Finnish computer game developer Rovio Entertainment that started the ''Angry Birds'' franchise. Inspired primarily by a sketch of stylized wingless birds, the game was first released for iOS and Maemo in December 2009. Since that time, over 12 million copies of the game have been purchased from the iOS App Store,〔 which has prompted the company to design versions for other touchscreen-based smartphones, most notably those using the Android, Symbian, Windows Phone and BlackBerry 10 operating systems. The series has since expanded to include titles for dedicated video game consoles and for PCs. A sequel named Angry Birds 2 was released on July 30, 2015, 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'' has been praised 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 and even long-term plans for a feature film or television series. With a combined tally of over 2 billion downloads across all platforms as of January 2014, including both regular and special editions of the software, the game has been 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". ==Gameplay== In ''Angry Birds'', the player controls a flock of multi-colored birds that are attempting to retrieve their eggs, which have been stolen by a group of hungry green pigs.〔 In each stage of the gameplay, enemy pigs are sheltered by structures made of various materials such as wood, glass, and stone resembling children's toy building blocks. The objective of the game is to eliminate all the pigs on the level. Using a slingshot, players launch a limited set of birds with the goal of either striking the enemy pigs directly or damaging their surrounding structures, causing the blocks to collapse and squash the pigs.〔 The player must set the angle and force of the bird's travel by pulling back on the slingshot (using intuitive touch-controls in the mobile versions). The launch process is quick and casual, with no visible trajectory data, and a player simply selects a point in the X-Y field behind the launch post from which the virtual slingshot will be released. In various stages of the game, additional objects such as TNT crates and rocks are incorporated into the structures, and power-ups may be used to enhance the birds to attack hard-to-reach pigs. 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 example, a yellow bird speeds up, a blue bird fragments into three birds, a black bird explodes, a white bird can drop an egg-shaped projectile, a pink bird can trap objects in bubbles, a green bird boomerangs back and an orange bird expands and inflates.〔 The pigs also vary, with hardiness relative to their size. Small pigs are weaker and are easily vanquished by direct hits or by debris from the damaged structures, while larger pigs are able to withstand more damage before succumbing to defeat. In addition, some pigs wear hats or armor, making them even more resistant to damage. Each level starts with the quantity, types, and firing order of birds predetermined.〔〔 If all of the pigs are eliminated after the last bird is launched, the level is completed and the next level is unlocked.〔 If all of the pigs are not killed, the level is incomplete and must be repeated. Points are scored for each pig killed as well as for damage to, or destruction of, structures, and hefty bonus points are awarded for any unused birds. Upon completing each level, players receive one, two, or three stars depending on the score received. Players may re-attempt unlocked levels as many times as they wish in order to complete them successfully or to earn additional points or stars. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Angry Birds (video game)」の詳細全文を読む スポンサード リンク
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