Complete the following achievements to unlock Microsoft Gamerscore points.
Achievement | How to unlock
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- Alien Commander (90 points)
| - Defeat Alien Commander for good.
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- Forbidden Temple (90 points)
| - Reach the forbidden Temple.
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- New Game Plus (100 points)
| - Finish the game in New Game Plus.
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| - Defeat Prisoner One for good.
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- Silent Assassin (90 points)
| - Complete first room without taking any damage.
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- Temple Sentinel (90 points)
| - Defeat Temple Sentinel for good.
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- Ultimate Challenge (90 points)
| - Complete the ultimate challenge.
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