Complete the following achievements to unlock Microsoft Gamerscore points.
Achievement | How to unlock
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| - Discover all the alien species.
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- Bone Collector (40 points)
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- Campaign Completed (50 points)
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- Close Quarter Specialist (40 points)
| - Complete a wave using only secondary items.
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| - Complete the game tutorial.
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- Completionist (50 points)
| - Complete the game plus mode.
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| - Set a new challenge highscore.
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| - Kill 100 enemies while in a frenzy.
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| - Finish the campaign on highest difficulty.
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| - Complete a wave using only grenades.
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- Level 1 Completed (40 points)
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- Level 2 Completed (40 points)
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- Level 3 Completed (40 points)
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- Level 4 Completed (40 points)
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- M-M-M-MONSTER KILL! (50 points)
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- Perfect Bonus (40 points)
| - Execute a perfect combo bonus.
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- Thrill-seeker (40 points)
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- Trophy Hunter (40 points)
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