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On June 17, 2013, Rovio teased on its Facebook page that Red, the main protagonist of the game, would receive an ability in a new episode. On June 26, 2013, Rovio released a YouTube video, uncovering three new facts: the episode would be called Red's Mighty Feathers, the update would come in July, and the Angry Birds app icon would receive a new design.[55] On July 3, 2013, the update was released, with fifteen levels of all-new game play. Instead of knocking over the pigs' castles, the player's goal is to keep the pigs from stealing the egg and leaving the playing field with it.[56] The pigs arrive in waves of complicated vehicles, and the only available bird is Red, whose new ability is to target the nearest pig. There is no score, and the three stars are awarded by completing three objectives in one try. The first objective is to finish the level without getting the egg stolen. The second is to pop all the pigs in the level. The third is to use fewer than or equal to a certain number of birds to clear the level. Because some people were skeptical about the new gameplay, Rovio later announced that they would add levels to the episode based on the original level style. On September 16, 2013, Rovio added 15 levels to the episode using the original style and these levels include manual targeting for Red Bird.[57] On November 26, 2013, Rovio added a 30-level episode called Short Fuse that transforms the Bomb's explosions into highly-destructive electrical pulses, adds a powerup
that transforms any Bird into a Bomb Bird and 3 different potions that can change the pigs.[58]
On December 11, 2013, Rovio added 15 levels to episode Birdday Party (cake 4) to celebrate its fourth birthday.[59] On March 4, 2014, 15 final levels were added to Short Fuse and the power-up icons were updated.[60] On July 22, 2014, a 15-level episode called "Flock Favorites" that is inspired by fans' favorite episodes (Poached Eggs, Danger Above, Mine and Dine, Bad Piggies, Red's Mighty Feathers, Short Fuse, and Surf and Turf) was added.[61] On November 23, 2014, in partnership with (RED) and Apple Inc., an update to the app was released that was exclusive to iOS.[62] In this update, there was an added special (RED)-themed Golden Egg level and Red's power from the Red's Mighty Feathers episode as a stand-alone power-up, that when purchased, can be used indefinitely (1 use per level) and 100% of the money went to the Global Fund to end AIDS. This purchase was only available until December 7, 2014.
On December 11, 2014, in honor of the Angry Birds' 5th birthday, an episode with 30 user-inspired levels was added.[63] On June 23, 2015, Flock Favorites was added with a second and final slate of 15 levels inspired by previous episodes.[64] On December 11, 2015, in honor of Angry Birds 6th birthday, new 15 levels were added to Birdday Party.[65] On November 10, 2016, 21 levels were released as singular episode called "Bird Island" that promoted the Angry Birds Movie, though the levels didn't unlock for players until November 17.[66][67]
On December 10, 2016, in honor of Angry Birds' seventh birthday 15 more levels were released as an addition to Birdday Party (though the levels didn't unlock until December 17).[68] In the following months, a newer episode called "Piggy Farm" would be released as a set of 15 levels on February 27, 2017, with two subsequent updates on March 30, 2017, and May 16, 2017, providing the next 15 levels and final 15 levels respectively.[66][69] On the May 16 update, a dual virtual currency system was also 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. The next subsequent update, which released the first 15 levels of the last chapter "Jurassic Pork" and served to conclude the unresolved plot in "Piggy Farm", arrived on August 23, 2017, followed by an update of 15 more "Jurassic Pork" levels on September 15, 2017.[70][71] The final levels of "Jurassic Pork" and the most recent levels of the game would release as a set of 16 levels on November 20, 2017.[72] In spite of the upcoming 8th anniversary of the game, no new 'Birdday Party' levels would be released and all subsequent updates until the game's 2019 removal would solely feature bug fixes.
Since its initial release for the Nokia N900 multimedia Internet device, and Apple's iPhone and iPod Touch mobile digital devices, Rovio has released versions of Angry Birds for additional devices. An iPad-exclusive version, Angry Birds HD, was released with the iPad mobile digital device in April 2010.[73] In August 2010, Angry Birds was made available to the Palm Pre phone running Palm's webOS operating system through its App Catalog online store.[74] Symbian^3 phones received a version of the game in October 2010,[75] which initially includes only the "Poached Eggs" and "Mighty Hoax" episodes.[76] Angry Birds works on Kindle Fire and Kindle Fire HD.
In May 2010, Rovio announced plans for a version for devices using Google's Android operating system,[77] with a beta version being released through the Android Market (now Google Play) in September 2010.[78] The full Android version of the game was first released instead on GetJar in October 2010,[79] though it was subsequently released on Android Market within days.[80] Rovio officials noted that GetJar had a more global reach than Android Market, and GetJar's availability on other smartphone platforms (including Symbian) would make cross-platform promotion of the game easier.[79] Unlike the previous versions, Angry Birds for Android is a free, ad-supported application, as paid applications aren't available on Android in some nations.[80] An update called "Bad Piggy Bank" enabled players to buy out the in-game ads.[81]
In October 2010, Microsoft suggested on one of its websites that a Windows Phone version of Angry Birds was in development. Rovio complained that Microsoft had not asked permission to make such a statement, noting that at that time it had not committed to design a Windows Phone version. Although Rovio asked Microsoft to revise its site to remove references to the game,[79][82] a Windows Phone version was ultimately released in June 2011.[83]