| Achievement | How to unlock | Points
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- A Baron, a Thief and an Inspector
| - You completed Arsène Lupin in Prison - Part 2.
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- A Robbery of fantastic proportions
| - You completed The Legend of Arsène Lupin.
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| - You completed Herlock Sholmes Arrives Too Late - Part 2.
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| - You found Lupin's calling card in The Arrest of Arsène Lupin - Part 2.
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| - You uncovered a secret about Arsène Lupin.
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| - You stole from Baron Cahorn.
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| - You tricked the servant in Arsène Lupin in Prison - Part 2.
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| - You uncovered a secret about Bernard d’Andrésy.
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| - You inspected all curios in The Legend of Arsène Lupin.
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| - You got a checkmate in Herlock Sholmes Arrives Too Late - Part 1.
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| - You ordered three timelines.
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| - You uncovered a secret about Désiré Baudru.
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| - You solved three mindmaps.
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| - You visited all locations in the game.
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| - You impressed the passengers in The Arrest of Arsène Lupin - Part 1.
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| - You stole from Georges Devanne.
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| - You uncovered a secret about Herlock Sholmes.
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| - You uncovered a secret about Horace Velmont.
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| - You secured the castle in Arsène Lupin in Prison - Part 1.
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| - You uncovered a secret about Inspector Ganimard.
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| - You inspected 25 objects.
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| - You completed The Escape of Arsène Lupin.
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| - You stole from Lady Jerland.
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| - You stole from Mr Rozaine.
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| - You impressed Nelly Underdown.
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| - You caught a prized fish in The Arrest of Arsène Lupin - Part 3.
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| - You fixed the pipes in The Escape of Arsène Lupin.
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| - You mastered five mechanisms.
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| - You met all the characters in the game.
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| - You completed Arsène Lupin in Prison - Part 1.
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| - You stole from the Captain.
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- The Château's secrets revealed
| - You completed Herlock Sholmes Arrives Too Late - Part 1.
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| - You completed A Chance Meeting.
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| - You completed The Arrest of Arsène Lupin - Part 2.
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| - You completed The Arrest of Arsène Lupin - Part 3.
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| - You made friends with the Rat.
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| - You tricked the Servants.
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| - You tricked the Shipmates.
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| - You revealed the 'real' Lupin in A Chance Meeting.
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| - You uncovered Thibermesnil's secret in Herlock Sholmes Arrives Too Late - Part 2.
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| - You completed The Arrest of Arsène Lupin - Part 1.
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