The Sinking City 2 Safe Codes and Lock Combinations Guide

The Sinking City 2 is a dark survival horror game with investigation elements, where exploring Arkham is regularly interrupted by puzzles, locked doors, and safes protected by combination locks. In this guide, we've collected every safe code, password, and door combination in The Sinking City 2, along with explanations of where to find the corresponding clues. You can learn how to solve all secrets and puzzles in The Sinking City 2 in our separate guide.

The first safe can be found near the very beginning of the game. Once you reach the area with Allen Radio Store, enter the nearby apartment building and head to Apartment No. 5. Inside, you'll find a wall safe and a note stating that the combination is connected to the owner's most important achievement.

You can discover the answer a little later. The sign outside the radio store shows the year it opened. The safe code is 1908.

The next combination lock is located near Redemption Church. This time, the combination isn't used to obtain optional loot. You need it to open the floodgate and continue along the water route.

A clue near the mechanism reveals that the password is the year the church bell was installed. Inside the church, you can find a document stating that it was founded in 1667. Another note explains that creating and installing the bell took another half-decade, meaning five years.

Therefore: 1667 + 5 = 1672.

Head to the third floor of Devil's Reef Hotel and enter Room 301. Inside, you'll find a safe that requires a separate combination.

The clue to the password is hidden in the lyrics to Baby, One More Tide, which you can read in the Investigation menu. To solve the puzzle, pay attention to four highlighted words and determine which numbers they represent. The order of the clues in the song matches the order of the digits in the code.

The relevant lines are: Spread my wings like a bat in flight / Curl my tail in hate and spite / Their octopus hearts beat in fear / As the tide makes all sins clear.

The first clue represents 2 because a bat has two wings. The tail gives you 1. An octopus has three hearts, giving you 3. Finally, sins refers to the seven deadly sins, giving you 7. The final combination is therefore 2137.

Inside the safe is Voss's Target Grip. This weapon accessory adds a perfect-shot mechanic: pull the trigger at the right moment to deal increased damage with the pistol. You can learn how to obtain the other weapon upgrades in our guide.

Another combination lock can be found in the basement of Akeley Memorial Hospital.

First, make your way to the Prosthetics Workshop on the second floor and pick up the Anti-Rust Acid.

Head down to -1F and find the rusted door leading to the Storage Room. Use the acid to open it. Behind the door is another gate protected by a combination lock.

The clues can be found:

The Storage Room code is 1308. Inside, you'll find supplies and Doyle's Cold Blood, an upgrade for The Minuteman submachine gun. You can find out where to get every weapon in the game in our separate guide.

Akeley Memorial Hospital contains another numerical puzzle, this time in the Wireless Room. Here, you need to enter three frequencies into a device connected to several talking brains.

To reach the room, first obtain the Old Man's Mask, then listen to the announcement in the Therapeutic Garden. After that, use Father Nathaniel's mask to pass through the locked entrance to Medical Records and make your way to the Wireless Room.

Inside, speak to all three brains. Each one gives you a clue for one of the frequencies. The first clue points to an unlucky number between 10 and 20, which is 13. For the second frequency, round 13 to the nearest ten and divide the result in half: 10 / 2 = 5. The third frequency is twice the sum of the previous two values: (13 + 5) × 2 = 36.

The correct sequence is therefore 13 → 5 → 36.

Enter each value separately and press the central confirmation button after each one. A green indicator will light up when a value is entered correctly. Once all three have been entered, the puzzle will be complete.

Solving the puzzle rewards you with Dream Essence. It is also connected to The Whisperers investigation.

At the Fish Market, you can find an unusual locked buoy. Instead of numbers, its mechanism uses symbols.

To solve it yourself, you need two notes: From Ezekiel's Wife and About Ezekiel. The first can be found near the Fishing Shop shortly after leaving the Safe Room, while the second is located in the Guard Post after you open the way using a Leyden Jar.

The notes mention several types of fish. You need to match them with the images found in the shop:

Set the symbols in the following order:

Lighthouse → Ropes → Starfish → Octopus.

Inside is Doyle's Hot Streak, an upgrade for The Minuteman that increases its effectiveness during sustained fire.

The next safe is tied to the main Fish Market storyline.

After obtaining the Antikythera, return to Ma and continue the story until the timeline changes. Then interact with the Memory Relic on the counter. Your character will be transported into the past.

Follow the phantom figures and listen to their conversations. These gradually reveal the correct combination: 6294.

One of the game's most unusual combinations can be found in the Cutting Area at the Fish Market. The Salt Storage door has a panel displaying sixteen Roman numerals.

To work out the code yourself, you'll need to collect several clues connected to the investigation. The most important one is the list of 16 Punishments of a Sailor. You then need to match the four punishments mentioned in the Instructions to Sybil with their corresponding numbers on the list.

The correct values are:

The order doesn't matter. You simply need to select all four correct values and confirm your input. Inside the Salt Storage, you'll find Pyre's Squid Barrel, a grenade launcher upgrade, along with the important note Surprise in the Safe?. You'll need it to solve the next safe.

The final numerical safe is also located at the Fish Market, inside the Locker Room.

Pick up the Surprise in the Safe? clue from the Salt Storage, then head to the nearby Locker Room.

This is one of the more confusing combinations because you can't properly work it out without first opening the Salt Storage.

A note beside the safe says that the final number cannot be 16 and that you should use 6 instead. Another clue inside the Salt Storage suggests that the rest of the combination is the same as the previous door code.

As a reminder, the Salt Storage door uses the sequence: 1 — 4 — 9 — 16.

Replace the final 16 with 6 and you get: 1496.

Inside is Pyre's Ocularum, another grenade launcher upgrade that improves the weapon's effectiveness against groups of enemies.

If you don't need the clues or explanations, use this quick list: