Detective Duck: The Suburbs Walkthrough (Full Guide)

Half a million tix are gone. You’re the duck standing in front of a quiet suburban house, and nothing about it feels quiet anymore.

Here’s the fast answer. Marcus is the culprit. The key evidence word is STEAL. Below you’ll find both a quick verdict summary and the complete step-by-step walkthrough, so use whichever one fits how you like to play.

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Quick Verdict Summary

Want the answer without spoiling every step? Start here.

Category	Answer
Culprit	Marcus, head of the IT department
Key evidence word	STEAL
Amount stolen	500 million tix
Where the money ended up	Alexander’s account, IBAN bloxy123
Alexander’s role	Unwitting recipient, not the thief

Marcus had access to the director’s systems through his IT position. He used the code STEAL to compromise the transfer, then likely tried to burn the evidence in his own fireplace.

About Detective Duck

Detective Duck is a Roblox mystery and puzzle game developed by Protocol: Anomaly. You play as a detective investigating crime scenes to find clues and identify a culprit.

The Suburbs is one of several cases available, alongside The Bank, The Train, and Museum. You can play solo, join up to 5 players in a public game, or gather up to 10 players in a private server.

The Full Detective Duck Walkthrough

Ready for every step? Here’s the complete path through the case.

Outside the House

1. Enter the front yard. Grab the axe on the left side.
2. Walk along the wooden fence next to the house. Find the damaged section and use the axe to widen it, creating a passage through.
3. Find a shovel on a table. Use it to dig the dirt spot nearby, revealing a sack.
4. Take the sack to the sand pile and fill it with sand.
5. Notice the crumpled note nearby. It mentions they keep forgetting to call the police.
6. Return to the front porch. Check the mailbox. It’s open, and an entrance key sits inside. This key unlocks the house across the street.

Entering the House and the Fireplace

1. Step inside. A fireplace is lit.
2. Use your sand-filled sack to extinguish it.
3. Clear the fireplace remains. You’ll find a burnt plate.
4. Shine your UV light on the plate. It reveals a hidden word: STEAL.
5. Above the fireplace, grab the key to the living room.

The Garage and Marcus’s Room

1. In the living room, notice the fridge. It’s linked to a fingerprint lock on the garage door.
2. Find a fingerprint sample near a sealed door on the right wall.
3. Use the fingerprint on the garage lock to open it.
4. Inside the garage, find a small black message decoder device on a wall shelf behind the car.
5. Check the trash can next to it for a note. It hints at a code: the number on the fridge, plus 1.4.
6. Go back and check the fridge display. It reads 99.6. Add 1.4, and you get 101.
7. Enter 101 on the keypad-locked door beside the fridge. This unlocks Marcus’s bedroom.
8. On the bedside table, grab the BloxBank card. Tapping it teleports you to the bank, but you don’t need that yet.
9. Insert the garage decoder into the device beside the TV. Give it a moment, then check it. It reads S-T-E-AL.

Marcus’s Computer

1. Check the diary on the bed. It hints that the desktop access code has two parts.
2. In the living room, find the sunset painting above the bookshelf. Use your UV light on it to reveal the first three digits: 706.
3. In the sofa area, move the coffee cup on the shelf. Use UV light there too, revealing the second half: 965.
4. Combine both parts for the full code: 706965. Log into the desktop.
5. The transaction ID shown is 890, sent to an account with IBAN bloxy123.

Alexander’s Room

1. Enter the other bedroom, belonging to Alexander. It’s unlocked.
2. Beside the computer, find a crumpled white note. It’s bank mail thanking the recipient for choosing their service, listing the IBAN as bloxy123, matching what you found on Marcus’s desktop.
3. Ignore the book on the floor and the numbers scrawled on the bathroom mirror. These are distractions, not clues.
4. Check Alexander’s cupboard. You’ll find the 500 million tix here, along with his personal diary. He writes that he’s confused about how he acquired the money.

The Bank Investigation

1. Return to Marcus’s room and use the BloxBank card to teleport to the bank.
2. The first room on the left is Marcus’s office. Check the decoder there. It reads success, confirming your earlier decoding worked.
3. Head to the director’s office. Paperwork shows transaction 890, for 500 million tix, was flagged not to be tracked.
4. Enter the IBAN bloxy123 you found in Alexander’s room. It matches Alexander, confirming the transaction went to him.
5. Check the clipboard on the table. It explains a contingency code: send S-T-E-A-L if there’s an interruption during a tix transfer.

Putting It Together

Return to Marcus’s room. The decoder still reads S-T-E-AL. The burnt plate from the fireplace also spelled STEAL. The director’s office document ties the same code to a theft contingency.

Marcus’s diary includes a note to himself to track the transaction and keep it safe. His computer confirms the transfer went to Alexander’s IBAN.

The game leaves one detail open. Did Marcus send the money to his brother to keep his own name clean, or to frame him? Either way, Marcus, the head of IT with access to the director’s systems, is your confirmed culprit.

STEEL or STEAL? Clearing Up the Confusion

You may have seen this evidence word written differently elsewhere. Some guides list it as STEEL.

The more detailed and internally consistent version is STEAL, confirmed three separate times across the case. It shows up on the burnt plate under UV light, in the decoder message reading S-T-E-AL, and in the director’s office document describing the exact same code as a theft contingency.

STEAL also fits the story. This is a case about stolen tix, and the word connects directly to that plot. STEEL doesn’t connect to anything else in the case at all. Do check the video walkthrough of the game.

More Detective Duck Cases

The Suburbs is just one mystery in a growing lineup. If you want more, The Bank, The Train, and Museum each offer a different crime to solve.

Playing with friends works well here too, since you can split up rooms and share clues as you go, whether in a public game or a private server with up to 10 people.

Visit our Guides section for more guides about all games.

Frequently Asked Questions

Who is the culprit in Detective Duck: The Suburbs?

Marcus, the head of the IT department. He had the access needed to compromise the director’s authorization systems.

What is the key evidence word, STEEL or STEAL?

STEAL. It’s confirmed three separate times across different discoveries in the case, and it fits the story’s theft plot directly.

Where do I find the entrance key to the house?

Check the mailbox on the front porch. It’s open, with the key sitting inside.

What’s the code for the keypad-locked bedroom door?

101. Take the fridge’s display number, 99.6, and add 1.4.

How do I unlock Marcus’s desktop computer?

Combine two UV-revealed code fragments: 706 from behind the sunset painting, and 965 from under the coffee cup, for the full code 706965.

Why does Alexander have the stolen money if he’s not the culprit?

Marcus sent the stolen tix to Alexander’s account. Whether this was to hide his own tracks or to frame his brother is left unclear by the game.

How many players can join a Detective Duck case?

Up to 5 in a public game, or up to 10 in a private server.

Are there other Detective Duck cases besides The Suburbs?

Yes. The Bank, The Train, and Museum are also available.

Quick Reference: Codes and Items

Item or Code	Detail
Entrance key	Found in the mailbox
Sand-filled sack	Used to extinguish the fireplace
Burnt plate word	STEAL, revealed under UV light
Keypad code	101 (fridge number 99.6 plus 1.4)
Painting UV code	706
Coffee cup UV code	965
Desktop login code	706965
Transaction ID	890
IBAN	bloxy123

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Image Plan

Eight images, with short file names, short alt text, short captions, and placement.

1. File name: detective-duck-suburbs-front-yard.jpg Alt text: Detective Duck front yard with axe on the ground Caption: The front yard where the walkthrough begins Placement: Right after the opening section, before “Quick Verdict Summary”
2. File name: detective-duck-suburbs-verdict-chart.jpg Alt text: Chart showing the culprit and evidence in Detective Duck Suburbs Caption: The quick verdict summary at a glance Placement: Next to the quick verdict summary table
3. File name: detective-duck-suburbs-fireplace-plate.jpg Alt text: Burnt plate revealed by UV light in a fireplace Caption: The burnt plate spelling STEAL under UV light Placement: In the “Entering the House and the Fireplace” section
4. File name: detective-duck-suburbs-fridge-code.jpg Alt text: Fridge display showing 99.6 in Detective Duck Suburbs Caption: The fridge number used to calculate the keypad code Placement: In the “The Garage and Marcus’s Room” section
5. File name: detective-duck-suburbs-painting-uv-code.jpg Alt text: Sunset painting hiding a UV revealed code Caption: The first half of the desktop code, hidden behind a painting Placement: In the “Marcus’s Computer” section
6. File name: detective-duck-suburbs-alexander-room.jpg Alt text: Alexander’s bedroom with a crumpled bank note Caption: Alexander’s room, where the matching IBAN is found Placement: In the “Alexander’s Room” section
7. File name: detective-duck-suburbs-director-office.jpg Alt text: Director’s office with bank paperwork in Detective Duck Caption: The director’s office where the STEAL contingency code is found Placement: In the “The Bank Investigation” section
8. File name: detective-duck-suburbs-steel-vs-steal.jpg Alt text: Comparison of STEEL and STEAL evidence word spellings Caption: Why STEAL is the correct evidence word Placement: Next to the “STEEL or STEAL” section