| Achievement | How to unlock
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| 1989 | Kill 1989 enemies.
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| 60 To Car | Go to the car 60 times.
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| Aced It | Get an A+ on any chapter.
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| Achievement Whore | Unlock all achievements.
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| Always On Top | Perform every ground kill in the game.
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| Batman | Clear chapter ?? using only a bat and the bat mask.
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| Cat Fight | Kill the panthers using the panther mask.
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| Combo Beginner | Perform a 4x combo.
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| Combo Intermediate | Perform a 6x combo.
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| Combo King | Perform a 12x combo.
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| Combo Master | Perform a 10x combo.
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| Combo Pro | Perform a 8x combo.
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| Dog Lover | Kill 99 dogs.
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| Domino Effect | Throw a weapon at an enemy so that his weapon hits another.
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| Eye For Details | Collect all the puzzle pieces.
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| Get A Life | Get A+ on all the chapters.
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| Guns For Show | Kill at least one enemy with each gun.
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| I Got New Friends | Unlock all weapons.
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| Karma | Die 1000 times.
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| Knife For Pros | Kill at least one enemy with each melee weapon.
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| Let In Some Air | Destroy 500 glass panels.
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| Nigel Lowrie | Use a human shield.
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| Pitcher | Hit at least one enemy with each throwing weapon.
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| Plain Luck | Kill three or more enemies with the same brick in one throw.
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| Playing Pool | Kill an enemy with a brick bounced against a wall.
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| Sewer Alligator | Find the crocodile mask.
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| Smell Something Burning | Kill the crapping gangster with a fireaxe.
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| Sounds of Animals Fighting | Wear all masks at least once.
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| That's It? | Beat the epilogue.
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| The Boss | Solve the puzzle.
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| The End? | Beat the mainstory.
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| These Are My Guns | Complete chapter five barehanded.
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| This Is It | Beat the epilogue with secret ending.
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| Two Birds With One Stone | Kill two enemies with the same brick in one throw.
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| Zoo Keeper | Collect all the masks.
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