Achievement | How to unlock
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Airborne for 60 Seconds | Airborne for 60 Seconds.
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Collected All Weapons | Collected All Weapons.
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Killed 13 Hammerheads | Killed 13 Hammerheads (ever)
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Killed 13 Skull Mechs | Killed 13 Skull Mechs (ever)
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Killed 6 Enemies in Single Explosion | Killed 6 Enemies in Single Explosion.
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Killed 666 Enemies | Killed 666 enemies (ever)
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Reached Wave 10 | Reached Wave 10.
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Reached Wave 20 | Reached Wave 20.
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Reached Wave 30 | Reached Wave 30.
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Reached Wave 40 | Reached Wave 40.
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Reached Wave 50 | Reached Wave 50.
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Reached Wave 60 | Reached Wave 60.
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