Complete the following achievements to unlock Microsoft Gamerscore points.
Achievement | How to unlock
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Defender of Autocanno (50 points) | Using Autocannon 300 times
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Every little helps (100 points) | Collect 2,000,000 Gold
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Expeller of Aliens (50 points) | Kill 3,000 Megascarab(s)
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Fearless (50 points) | Kill 6,000 Aliens
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Heavy Tank (50 points) | Use Machine Gun for 300 times
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Killer of Alien (50 points) | Kill 3,000 Explorer(s)
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Machine Breaker (50 points) | Use Machine Gun for 300 times
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Master of clearing Stage (100 points) | Clear Stage 3-7
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Master of Collection (50 points) | Obtain 6 weapons
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Millionare (200 points) | Collect 3,200 Energy
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Shadow of Death (50 points) | Kill 2,000 Elite(s)
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Star Picker (100 points) | Collect 63 Stars
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Zombie Killer (50 points) | Kill 4,500 Stinger(s)
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Zombie Nightmare (50 points) | Kill 2,400 Smasher(s)
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