20 achievements for 1000 Gamerscore
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Undead Hunter
Kill 100 zombies
25 Gamerscore
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Killing Spree
Kill 200 zombies
50 Gamerscore
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I Really Don't Like Zombies
Kill 500 zombies
75 Gamerscore
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Wiseguy Whacker
Kill 150 Mafiosi
50 Gamerscore
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German Hunter
Kill 200 German soldiers
50 Gamerscore
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Guillotine Master
Kill 75 enemies with headshots
50 Gamerscore
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Chop Shop
Destroy 15 vehicles
25 Gamerscore
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Sweet Tooth
Eat 50 cannoli
50 Gamerscore
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Swinging Balls
Kill 5 ball-and-chain zombies in mid air
50 Gamerscore
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Timber
Kill 100 enemies with the chainsaw
50 Gamerscore
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When Blood Hits The Fan
Have 20 enemies killed by propelling airvents in the "Secret Base" level
50 Gamerscore
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The Widowmaker
Defeat the U-boat
25 Gamerscore
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Tanks A Lot
Defeat the Tank boss
75 Gamerscore
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Drop The Ball
Defeat the German Commander Boss
50 Gamerscore
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The Last Don
Defeat the end boss
100 Gamerscore
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No Loitering!
Simultaneously kill 5 enemies with the rocket launcher
25 Gamerscore
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Mindblowing
Consecutively kill 20 units with headshots
75 Gamerscore
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Homerun
Survive the Raid using only the baseball bat
50 Gamerscore
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Quick Draw
Finish the Thugtown level, using only the pistol
50 Gamerscore
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For Whom The Bell Tolls
Kill a German soldier by dropping the churchbell on top of him in the "Killing Fields" level
25 Gamerscore