| Achievement | How to unlock
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| - Complete the bonus chapter.
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| - Complete each HOG in Story Mode without the lantern.
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| - Escape from Houdini's coffin in one try.
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| - Find all 100 padlocks, handcuffs, keys and straightjackets in "Escape Artist Hunt."
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| - Find all the ESP cards in the garden in one try.
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| - Solve all the puzzles in Story Mode.
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| - Complete a hidden object scene in less than a minute.
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| |
| - Unlock Unlimited Hidden Object Mode.
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| - Collect all 70 clovers in Story Mode.
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| - Get into Houdini's house without a hint.
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| - Find every hidden object in all Unlimited HO Mode scenes.
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| - Collect all 52 ravens in Story Mode.
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| - Complete Story Mode without using any hints.
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| |
| - Complete Story Mode with no Black Cat scares.
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