| Achievement | How to unlock | Points
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| - Finish full campaign with your friend!
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| - Beat campaign at any difficulty.
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| - Beat campaign at ARCADE difficulty.
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| - Collect all creature entries.
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| - Beat Chariot at the end of first chapter.
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| - Collect all items in a single campaign.
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| - Nail down opponent's head with Pitter.
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| - Discover all three endings.
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| - Collect all additional weapons available in the game.
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| - Don't destroy any glass panels on level 2.
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| - Kill five enemies at the same time.
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| - Beat Hangedman at the end of second chapter.
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| - Beat Hermit at the end of third chapter.
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| - Finish whole campaign without taking any damage.
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| - Beat Magician at the end of fourth chapter.
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| - Finish level without reloading with bullets in the chamber.
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| - Finish the game with the final score below 62,000 and the last score digit not equal to zero.
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| - Finish single chapter without taking any damage.
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| - Finish any chapter with help of Player 2.
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| - Kill five enemies in a row.
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| - Kill all Scientists at any chapter.
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| - Lose all credits and die.
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| - Let Player 2 join the game while in a middle of a campaign.
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| - Knock up an enemy as high as possible.
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| - Devastate opponent's body as much as possible!
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| - Save all Scientists through the campaign.
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| - Enter secret room on level 4.
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| - Shoot down enemies projectiles fifty times.
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| - Unlock all achievements of The House Of The Dead!
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| - Finish the game with the final score below 62,000 and the last score digit equal to zero.
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| - Discover all paths available in the game.
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| - Kill three enemies in a row.
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| - Complete the game with a total score of over 62,000.
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| - Collect your first additional weapon.
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| - Shoot all Hangedman's Devilions.
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