The Train map is a bit longer than the Jewelry case and throws multiple puzzles at you back-to-back, which is why most players get stuck somewhere in the middle. The Detective Duck The Train Walkthrough here is simple—follow the order, don’t skip items, and everything starts making sense.
Starting Area – First Key Item
Begin by interacting with the red coat, because this gives you the Luggage Key, which is required to open the first container.
Luggage → Scissors
Use the Luggage Key on the luggage, and inside you’ll find Scissors, which are needed for the next step.
Teddy Bear → Compartment Key
Use the scissors on the teddy bear, since cutting it open gives you the Compartment Key, allowing you to unlock the door—but not completely yet.
Missing Handle Solution
When you try to open the compartment, it tells you the door is missing a handle, so check the blue luggage, which contains the Handle, then attach it and use the key to fully unlock the compartment.
UV Puzzle – Finding the Hidden Code
Move to the next compartment and use your UV Light, because it reveals hidden numbers written around the area.
The numbers you’ll find are:
2041 - 3 80
Convert Numbers to Letters (Window Clue)
Use the window chart with your magnifying glass to convert numbers into letters:
- 2 → S
- 0 → N
- 4 → O
- 1 → W
- -3 → M
- 80 → A + N
This spells:
SNOWMAN
Magic Word Puzzle
Go to the magic wand box and enter the word:
SNOWMAN
This opens the briefcase and gives you the next puzzle.
Math Puzzle Code (46)
Inside, you’ll see a color-based math puzzle:
- Blue = 10
- Red triangle = 5 → makes 50
- Green triangle = 4
So:
50 - 4 = 46
Enter:
Code: 46
Cutting Wires to Get the Key
You won’t be able to pick up the key immediately because wires block it, so use wire cutters/scissors to cut them and collect the key.
Safe Code (4940)
In another compartment, use the magnifying glass to read the wall, which reveals:
Code: 4940
Go back to the first room and enter this code in the safe to get:
- Lockpick tools
- Additional keys
Unlocking the Next Compartments
Use:
- Keys for labeled doors (S1, S2, etc.)
- Lockpick for the locked compartment
Then collect:
- Lighter
- Potion
Acid Puzzle (Unlock Final Lock)
Pour the potion into the jar, then use the lighter, which creates acid, and apply it to the lock to dissolve it and open the path forward.
SD Card Clue (Important Evidence)
In Room B3, collect the SD Card, then go back to the first room and insert it into the camera.
You’ll see:
- A photo taken from Room B2 angle
Also note the code:
4 × 9
Final Code (4 × 9)
Enter:
4 × 9 = 36
This completes the final puzzle interaction.
Finding the Real Suspect
Now focus on the investigation:
- The broken lock shows tool marks
- Use magnifying glass → see a specific dirt pattern
- Go back to Room B3 tools → same dirt mark appears
Combine that with:
- SD card found in same room
- Photo angle pointing to involvement
Correct Suspect
All clues point to:
The Mechanic
He has:
- Tools matching the marks
- Dust pattern evidence
- Access to the area
Finish the Case
Go to the suspects, select the mechanic, and confirm your choice to complete the investigation successfully.
Quick Recap (All Codes & Items)
- Luggage Key → Red Coat
- Scissors → Luggage
- Compartment Key → Teddy Bear
- Handle → Blue Luggage
- UV Code → 2041 - 3 80
- Word → SNOWMAN
- Math Code → 46
- Safe Code → 4940
- Final Code → 36 (4×9)
- Suspect → Mechanic
This map isn’t hard—it just throws multiple puzzles at you in sequence. Once you follow the correct order and pay attention to clues like UV numbers, symbol conversions, and evidence patterns, everything connects naturally and leads you straight to the mechanic without guessing.
