How to Defeat 4-21 on "Angry Birds"
In the smartphone game "Angry Birds," level 4-21 features seven pigs of various sizes hiding behind one large tower and four smaller walls. Your objective is to fling up to six birds at the pigs and the structures, trying to do enough damage to destroy all the pigs. While you may consider sending your birds over the tower at a sharp angle, a slightly better strategy will have you beat the level by attacking the tower head-on.
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Instructions
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Tap the bird in the slingshot to control him. Move your finger back so that the bird's trajectory will have it collide with the grey stones at the top of the tower. Drag the bird back as far as it will go; then lift up your finger sending the bird flying into the tower.
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Repeat the exact same shot, as quickly as possible, with a second bird. The quicker that you complete the second shot, the better chance that you have of taking down the tower on the second shot. If the tower remains standing, fire a third shot in the same spot to take it down.
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Shoot one final bird, once the tower has fallen, at the remaining pigs. The trajectory of this bird should be slightly lower than the trajectory of your original birds. If the pig with the helmet on has survived the tower coming down, aim directly at him, otherwise aim to hit the three pigs behind the vertical wood planks. If necessary, you will have three chances to hit these three pigs before you will have to start the level over.
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