Complete the following tasks to unlock Apple Game Center achievements.
Achievement | How to unlock
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| - Complete all missions in Black Sheep Down.
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| - Complete all missions in Operation Grass Snake.
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| - Complete all missions in chapter 8.
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| - Complete a mission on hard level.
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| - Complete all missions in chapter 7.
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| - Complete all missions in Operation Full Wool Jacket.
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| - Complete 20 missions without using "retry".
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| - Save several sheep during a hard mission.
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| - Complete all missions in Operation Sheepwood.
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| - Complete a "wolf infiltrated" mission on hard level.
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| - Achieve an overall score of at least 75000 points.
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| - Complete all missions in Starsheep Troopers.
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| - Complete all missions on Operation Sheeplord.
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| - Complete all missions in Omaa Beach.
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