Angry Birds 4

Angry Birds 4 is a puzzle platformer game developed by Rovio Mobile, officially released on December 11, 2019, which means it is the 10th Anniversary of Angry Birds. The game utilizes new challenges such as towers. The game also introduces King Pig Impostors and a new bird known as Janet. It is also one of the few Angry Birds games not to include the pig commanders (except for King Pig).

Plot
Taking place two years after the events of Angry Birds 3, the birds wave goodbye to their eggs to fly in their capes. However, as soon as they return, King Pig suddenly appears, grabbing them with a giant mechanical fist, as well as damaging Red and co., making them lose their cape power-ups. King Pig reveals that the eggs been possessed by the Impostor Eggs. The giant mechanical fist launches the heroes towards the Feathered Plains. Red and co. crash into a tree. The birds then tumble out of the tree, passing a half bird half weasel named Janet who joins the birds, while they're at it, and look into the horizon to see King Pig beginning a possession from Cobalt Plateaus to the Cobalt Ruins, setting the birds to go on a new adventure and stop the Impostor Eggs.

As the game progresses, the view occasionally shifts to Cobalt Plateaus, showing the construction of the new castle, and the castle being surrounded by a thin tornado-like cloud that is made thicker, entirely obscuring the castle. The birds also have to deal with King Pig's forces, including his minions, and the King Pig Impostors, even himself, who occasionally attacks the heroes with his airship. None of them is enough to stop the birds from progressing, and King Pig causes the airship to crash after making the mechanical hand punch through it. However, they reveal that the Impostor Eggs is in their now-possessed castle.

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