| Achievement | How to unlock
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| Barrel 1 | Slaughter 500 of the Dead.
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| Barrel 2 | Slaughter 1,300 of the Dead.
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| Barrel 3 | Slaughter 2,250 of the Dead.
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| Barrel 4 | Slaughter 5,500 of the Dead.
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| Barrel 5 | Slaughter 1,400 of the Dead.
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| Barrel 6 | Die 1,000 Deaths.
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| Face 1 | Slaughter 100 of the Dead.
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| Face 2 | Find 7 Empty Boxes.
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| Face 3 | Destroy 13 Pieces of Hanging Meat.
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| Face 4 | Slaughter 300 Dead in a Single Game.
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| Face 5 | Don't Pop Any Balloons in Room 6.
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| Face 6 | Survive 10 Rounds in Room 3.
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| Face 7 | Die 300 Deaths.
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| Face 8 | Survive a Single Game for atleast 13 min.
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| Face 9 | Slaughter 30,000 of the Dead.
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| Level 0 Stock | Use the Level 0 Stock.
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| Level 1 Stock | Slaughter 300 of the Dead.
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| Level 2 Stock | Slaughter 1,700 of the Dead.
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| Level 3 Stock | Slaughter 3,500 of the Dead.
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| Level 4 Stock | Slaughter 7,500 of the Dead.
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| Machine Gun | Use the Machine Gun Barrel.
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| Magazine 1 | Slaughter 1,000 of the Dead.
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| Magazine 2 | Slaughter 4,000 of the Dead.
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| Magazine 3 | Slaughter 9,000 of the Dead.
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| Magazine 4 | Slaughter 20,000 of the Dead.
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| Pellet Gun | Use the Pellet Gun Reciever.
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| Raw Face | Just Kill Something.
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| Reciever 1 | Slaughter 150 of the Dead.
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| Reciever 2 | Slaughter 750 of the Dead.
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| Reciever 3 | Slaughter 3,000 of the Dead.
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| Reciever 4 | Slaughter 6,000 of the Dead.
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| Reciever 5 | Slaughter 10,000 of the Dead.
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| Reciever 6 | Slaughter 25,000 of the Dead.
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| Starter Magazine | Use the Starter Magazine.
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