The Train map looks simple at first, but it hides a lot of clever little puzzles that can slow you down if you miss even one small detail. I cleared this map completely, so here is the clean, stress-free route that takes you from the very first compartment all the way to catching the correct suspect.
Follow this in order and you will not get stuck.
Roblox Detective Duck THE TRAIN Walkthrough (GUIDE)
First Compartment – Getting Out
The very first thing you need to grab is the red coat hanging inside the compartment.
Click it to get the luggage key.
Use the luggage key on the nearby bag to collect scissors.
Now use the scissors on the teddy bear. This gives you the compartment key.
Try opening the door — you will see it is missing a handle.
Open the blue luggage, collect the handle, attach it to the door, then use the key to leave the room.
Second Compartment – UV Code Puzzle
Equip your UV light and look around. You will see glowing numbers on the walls.
Write these down:
2041 – 3 – 80
Now equip the magnifying glass and use the alphabet window chart to convert each number into letters.
This turns into the word:
SNOWMAN
Go to the magic wand case, type SNOWMAN, and open it.
Inside, you get a math puzzle:
Blue triangle = 10
Red triangle = 5 → becomes 50
Green triangle = 4
So:
50 – 4 = 46
Enter 46 into the lock.
Before taking the key, grab the wire cutters and cut the wires.
Now collect the key and leave the room.
Safe Code Room
Move to the room that mentions a password on the wall.
Use your magnifying glass and you will see:
4940
Go all the way back to the very first room and use this on the safe.
Inside, collect the lockpicks.
Acid Puzzle Room
Head to the locked room marked with the lockpicks.
Open all three sections using your tools.
Collect the lighter and the potion.
Pour the potion into the jar, then light it with the lighter.
Wait a few seconds — this creates acid.
Use the acid on the lock to open the next compartment.
SD Card & Camera Clue
Inside this room, collect the SD card.
Go all the way back to the first compartment and place the SD card into the camera.
Look closely at the photo — it was taken from Room B3.
Remember this.
Also note the book code:
4 × 9
Enter that on the book lock.
Finding the Real Suspect
Now head to the broken lock near the end of the train.
Use your magnifying glass — notice the dust mark on the lock.
Return to Room B3.
Zoom in on the toolbox there — you will see the same dirt mark and this is also where the SD card was found.
This confirms the suspect.
Go to the mechanic carrying the dusty toolbox and vote him as the suspect.
He is the correct criminal.
Case Closed
Once you accuse the mechanic, the investigation completes and the Train map is fully solved.
You’re done — no guessing, no random clicking, just clean detective work.