| Achievement | How to unlock
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| 5 of Swords | Complete the bonus chapter.
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| Black Hole | Complete each HOG in Story Mode without the lantern.
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| Death Defying | Escape from Houdini's coffin in one try.
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| Escape Artist | Find all 100 padlocks, handcuffs, keys and straightjackets in "Escape Artist Hunt."
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| Gardener | Find all the ESP cards in the garden in one try.
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| Golden Geek | Solve all the puzzles in Story Mode.
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| HOG Wild | Complete a hidden object scene in less than a minute.
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| Houdini Protégé | Complete Story Mode.
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| Hypnotic Eyes | Unlock Unlimited Hidden Object Mode.
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| Irish Rover | Collect all 70 clovers in Story Mode.
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| Locksmith | Get into Houdini's house without a hint.
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| Magic Wand | Find every hidden object in all Unlimited HO Mode scenes.
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| Ornithologist | Collect all 52 ravens in Story Mode.
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| Perfect | Complete Story Mode without using any hints.
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| Pigeon | Conjure a pigeon.
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| Scaredy Cat | Complete Story Mode with no Black Cat scares.
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