| Achievement | How to unlock
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| - Killed 100 zombies with the thumper.
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| - Killed 100 enemies with the gatling gun.
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| - Unlocked the zombie farm (Level 5 unlock).
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| - Unlocked the sniper rifle.
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| - Fully upgraded the sniper rifle.
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| - Killed the Skeleton King.
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| - Fully upgraded the Thumper.
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| - Fully upgraded all weapons.
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| - Fully upgraded the pistol.
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| - Killed 100 zombies with the pistol.
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| - Fully upgraded the shotgun.
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| - Killed 100 zombies with the sniper rifle.
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| - Killed 100 zombies with the shotgun.
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- SAY HELLO TO MY LITTLE FRIEND
| - Killed 200 zombies with the gatling gun.
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