Complete the following achievements to unlock Xbox Live Gamerscore points.
Achievement | How to unlock
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- Crystal Skull (40 points)
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| - Unlock the Gentleman hero.
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- Plasma Pistol (90 points)
| - Buy the Plasma Pistol gun.
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| - Unlock the Princess heroine.
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| - Unlock the Professor hero.
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- Track Shooter (30 points)
| - Kill a Track Shooter enemy.
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- Zombie Runner (15 points)
| - Kill a Zombie Runner enemy.
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- Zombie Shooter (15 points)
| - Kill a Zombie Shooter enemy.
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- Zombie Turtle (15 points)
| - Kill a Zombie Turtle enemy.
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