Achievement | How to unlock
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Complete all tasks | Destroy more than 35 copters.
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Complete fifth task | Burn all weed in less than 270 seconds.
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Complete first task | Fly in less than 60 seconds.
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Complete forth task | Destroy more than 60 barrels.
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Complete second task | Destroy more than 40 barrels.
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Complete seventh task | Destroy the tower.
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Complete sixth task | Destroy more than 60 barrels.
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Complete third task | Survive more than 200 seconds.
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