| Achievement | How to unlock
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| Bookworm (14) | You got the Book of Wisdom in Marathon Mode! (Secret)
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| Duck Society (14) | Get all the ducks in a single Marathon playthrough.
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| Hardcore (14) | Beat the game without losing a life and getting all the special items in a single Marathon playthrough.
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| I'm not sure that's safe to eat... (10) | Get some meat from inside a wall while in Marathon Mode.
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| One little duck for Anette... (12) | Collect a duck in Marathon Mode!
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| Party of Ducks (14) | Collect four ducks in a single Marathon playthrough.
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| Pointless (14) | Complete a level without scoring any points at all. (Secret)
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| Soulful (14) | Complete the game in Marathon Mode.
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| You come into my house? And you do THAT? (14) | Use a certain well-known cheat code. (Secret)
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