| Achievement | How to unlock
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| - Opened the Police Archives
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| - Got across the river by boat
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| - Got the whole Dossier of Deaths
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| - Found all collectibles in the game
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| - Established the identity of the maniac
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| - Finished a hidden-object puzzle without any hints
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| - Find three hidden objects in three seconds
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| - Solved a mini-game in one minute
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| - Finished a hidden-object puzzle in one minute
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| - Finished three hidden-object puzzles in a row in one minute each
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| - Finished five hidden-object puzzles in a row in one minute each
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| |
| - Saved all the victims of the maniac
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| - Broke into the murderer's car
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| - Finished all hidden-object puzzles without any hints
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| - Finished any hidden-object puzzle using only the alternate puzzle
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| - Found the murderer's hideout
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| - Solve five mini-games without skipping
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| - Completed 10 mini-games without skipping
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| - Trespassed on private property
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| |
| - Solve a mini-game without skipping
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| - Finished five hidden-object puzzles without any hints
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| - Finished three hidden-object puzzles without any hints
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| |
| - Find 10 hidden objects in 10 seconds
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| |
| - Find five hidden objects in five seconds
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