| Achievement | How to unlock
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| An End to Evil | Complete campaign (all missions) on Normal difficulty.
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| Basic Training | Complete 'Basic Training' to gain this achievement.
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| Battle Victor | Complete 'The Battle of Pudding Lane' with a score of 1100 or more.
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| Battle Winner | Complete mission 'The Battle of Pudding Lane' to gain this achievement.
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| Burying the Dead | Complete mission 'Burying the Dead' to gain this achievement.
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| Chess with the Dead | Complete mission 'Chess with the Dead' to gain this achievement.
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| Cult Hunter | Complete campaign and keep the main investigators alive.
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| Dead and Buried | Complete 'Burying the Dead' with a score of 1100 or more.
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| Dead and Dreaming | Complete 'Not Dead But Dreaming' with a score of 1100 or more.
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| Dead Draughts | Complete 'Chess with the Dead' with a score of 1100 or more.
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| Deanimator | Kill 50 Reanimates.
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| Death by Gas | Complete Mission 'Death by Gas' to gain this achievement.
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| Death of Gas | Complete 'Death by Gas' with a score of 1100 or more.
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| Many Many Voices | Complete 'The Many Voices' with a score of 1100 or more.
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| Minds of Steel | Complete campaign without any units going insane.
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| Miskatonic Alumni | Complete campaign; main units alive, score 10000+.
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| Not Dead Yet | Complete Mission 'Not Dead But Dreaming' to gain this achievement.
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| Reanimate Slayer | Kill 25 Reanimates.
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| Super Raider | Complete 'The Raid' with a score of 1100 or more.
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| The Fire Shouts | Complete 'The Fire Speaks' with a score of 1100 or more.
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| The Fire Speaks | Complete mission 'The Fire Speaks' to gain this achievement.
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| The Hard Road | Complete campaign (all missions) on Hard difficulty.
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| The Many Voices | Complete mission 'The Many Voices' to gain this achievement.
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| The Raid | Complete mission 'The Raid' to gain this achievement.
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| The Thunder Roars | Complete 'The Thunder Speaks' with a score of 1100 or more.
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| The Warning Thunder | Complete mission 'The Thunder Speaks' to gain this achievement.
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