Roblox Detective Duck Pizzeria Weekly Case Walkthrough (Nonna’s Secret Sauce)

The Pizzeria is Detective Duck’s weekly case, filed in-game as Case #: 0088 – Nonna’s Secret Sauce. The night before the town’s pizza contest, someone opened the locked walk-in fridge at Pizzeria Bella at 10:31 PM and took the sauce. The puzzles are reshuffled every time you load in, and so is the culprit. A walkthrough that gives you one fixed answer will fail you about as often as it helps.

Quick answer: Open the kitchen, solve its lock, collect all seven clues, then inspect the fingerprint on the walk-in fridge scanner. Vote for whoever it names. In tested runs that was Lucy (Cashier) or Sofia (Customer).

Pizzeria case suspects and what you are proving

The restaurant greets you as Andrea’s Pizza, but the case file calls it Pizzeria Bella. You have four suspects. Only one of them left a print on the fridge scanner in any given round.

Suspect	Role	Culprit in tested runs
Sofia	Customer	Yes (one run)
Mr. Romano	Manager	No
Lucy	Cashier	Yes (two runs)
Jake	Dishwasher	No

Sofia’s suspect card lists her as 21 years old. It also notes that she comes in every single day and always orders extra sauce. That is flavor text. The fingerprint is the only thing that settles the vote, so do not convict anyone off a profile or off last week’s answer.

Pizzeria puzzle variants: Which one you got

Every round uses the same building and the same goal. The route into the kitchen and its locked box changes, though. Look around the dining room first. A glowing pattern on the hanging Italian flag means you have the neonpad route. Rotten tomatoes lying around mean you have the blender route.

Variant	Dining room	Kitchen
Neonpad route	Flag pattern opens a box	Lockbox, then diary code
Blender route	Tomato acid melts a box	Tomato acid, then neonpad

Both routes share the same lockpicking mini-game at the kitchen door. You have to land the moving bar inside the highlighted zone three times in a row. Press the on-screen HIT button or click the mouse when the slider is over the target. The game rates each hit as GOOD or CLOSE.

Neonpad route: Flag pattern, lockpicks, and the diary code

Find the hanging flag on the dining room wall that shows a lit green-and-white pattern. Note which squares are lit. The pattern is different in every round.

Go to the wall neonpad and press the same squares. When the game says “The neonpad has been completed correctly,” a storage box opens nearby.

Run 1: Dining Room & Neonpad — Copy the flag's lit squares onto the dining room neonpad to open the storage box. Shown at 01:02 in Roblox Master Guides’s video. Image: Protocol: Anomaly

Take the Lockpick from the open box. The prompt “You found a Lockpick” confirms it is in your inventory.

Use the Lockpick on the locked kitchen door and finish all three stages of the timing bar. The door opens to the kitchen and storage area.

Run 1: Lockpicking Kitchen Door — Land the slider in the target zone three times to open the kitchen door. Shown at 01:21 in Roblox Master Guides’s video. Image: Protocol: Anomaly

Check the trash bin beside the kitchen shelves to find a second Lockpick. You need it for the locked white lockbox in the same room.

Run 1: Kitchen Exploration & Box Lockpick — The second Lockpick opens the white lockbox that holds the diary. Shown at 01:50 in Roblox Master Guides’s video. Image: Protocol: Anomaly

Pick the white lockbox and open the Diary inside. Look for the delivery scooter entry that ends with “Kilometers driven this week:” followed by a four-digit number. That number is your keypad code.

Run 1: Reading Diary & Keypad Code — The kilometers-driven figure in the diary is the code for the kitchen wall keypad. Shown at 02:11 in Roblox Master Guides’s video. Image: Protocol: Anomaly

Enter that number on the kitchen wall keypad. “A correct code has been entered” means it worked, and “You completed all the puzzles in this map” follows once every lock is done.

Tested rounds have used 3831 and 7068. The diary is randomized along with everything else, so always enter the number your own copy shows.

Run 2: Kitchen Lock & Diary Code 7068 — A round using the alternate diary code, partway through entering 7068 on the keypad. Shown at 05:11 in Roblox Master Guides’s video. Image: Protocol: Anomaly

Blender route: Making acidic juice from rotten tomatoes

In this version, metal lockboxes take the place of the flag and the diary. You melt them with juice made from tomatoes. Each room needs its own batch of four.

Gather the four rotten tomatoes scattered around the dining room. Each pickup shows “You found a Tomato.”

Put all four tomatoes into the dining room blender. “You created an acidic juice!” confirms the Acid Juice is in your inventory.

Pour the juice on the locked dining room box with the Add Juice prompt. The lock melts, and the Lockpick inside is yours.

Pick the kitchen door lock with the same three-stage timing bar.

Find the four tomatoes in the kitchen and blend them in the kitchen counter blender. Pour this second batch on the kitchen’s locked box.

Read the grid pattern inside the melted box and enter it on the kitchen wall neonpad. That clears every puzzle on the map.

All seven Pizzeria evidence clue locations

Clearing the puzzles is not enough. If you try to end the investigation early, the phone shows “YOU CAN’T END THE INVESTIGATION YET.” It tells you to discover all room suspect clues first. Equip the Magnifying Glass or UV Light and hold it near a sparkling clue. Then press the inspect prompt that appears.

Clue	Location	Tool
Text On Wall	Near the kitchen doorway	UV Light
Hair On Floor	Kitchen floor	Magnifying Glass
Hair Near Sink	Kitchen counter	Magnifying Glass
Fingerprint Part	Kitchen table or floor	Magnifying Glass
Fingerprint Part	Kitchen/living area floor	Magnifying Glass
Hair Near Cash Register	Counter by the register	Magnifying Glass
Cloth Piece Near Cash Register	Counter corner	Magnifying Glass

Each find pops a “Revealed:” notice with the clue’s name. The UV text on the wall complains that someone called “THREE times today” asking for the fridge code. The name in that note changes between rounds, and both Marco and Gino have shown up. Neither one is on the suspect list.

Run 1: Evidence Collection — Sweeping the kitchen counter with the Magnifying Glass turns up the Hair Near Sink clue. Shown at 02:50 in Roblox Master Guides’s video. Image: Protocol: Anomaly

Once the seventh clue is logged, the game says you can now end the investigation. Equip the phone to do that.

Fridge fingerprint and voting the Pizzeria culprit

Inspect the fingerprint reader beside the walk-in fridge door. It names whoever opened the fridge, with a line like “This is the fingerprint of Lucy (Cashier)!” or “This is the fingerprint of Sofia (Customer)!” That name is the answer for your round.

Equip the phone and choose END INVESTIGATION. This takes you to the interrogation room, and RESUME INVESTIGATION will bring you back if you need it.

Choose VOTE SUSPECT and pick the person the fridge print named.

Lock in the vote. The screen confirms the result with “[Name] was most voted.”

You know you solved it when “Well done, Detective. You caught the right suspect.” appears. The culprit goes into a cell, and then the Supreme Court of Ducks card loads. It lists the charge as theft of a secret recipe. The sentence is to return the sauce, apologize to Nonna, and wash every dish at the Pizzeria for a month. From there you can pick REPLAY to see a new puzzle mix, or RETURN TO LOBBY. If you are not in the game yet, the case is in the free Detective Duck experience on Roblox.