Complete the following tasks to unlock Apple Game Center achievements.
Achievement | How to unlock
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| - Finish the campaign and get the "Defeat ending".
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| - Finish a mission with a 100% enemies destroyed rating.
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| - Upgrade your weapon to the 1st level.
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| - Destroy 2000 enemies through the entire game.
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- Experienced Soldier (10 points)
| - Destroy 100 enemies through the entire game.
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| - Upgrade your weapon to the 2nd level.
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| - Upgrade your weapon to the 3rd level.
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| - Destroy 50 enemies through the entire game.
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| - Finish a mission without losing any HP.
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- Killing Machine (10 points)
| - Destroy 500 enemies through the entire game.
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| - Destroy 1000 enemies through the entire game.
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| - Destroy 5000 enemies through the entire game.
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| - Destroy 30 enemies through the entire game.
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| - Destroy 8 enemies with one barrel roll or loop.
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- The Back-up Boys (20 points)
| - Upgrade your weapon to the 4th level.
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- The Secret Weapon (20 points)
| - Keep a special ammo up for 60 seconds.
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| - Finish the campaign and get the "Victory ending".
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- Worth The Cost (10 points)
| - Destroy 200 enemies through the entire game.
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