Throughout any scenario, you will find 3 Safes and 5 Locks that you must open by finding the specific clues under either files or films. The specific location of them is described below:

Safes

1. Police Station 1F – West Office
2. Police Station 2F – Waiting Room
3. Sewers – Treatment Pool Room

Locks

1. Police Station 1F – West Office
2. Police Station 1F – West Office
3. Police Station 2F – Shower/Locker Room
4. Police Station 3F
5. Sewers – Control Room

Please refer to the Additional Resources section of this guide for the correct combinations to open them and a collectible guide with their locations.

To get this trophy, you must unlock all of the safes and locks in the game (The portable safes do not count for this trophy). There are a total of 8 safes and locks in the game needed to unlock this trophy. The safes will all have a 3 digits numeral code to input by going Left, Right, Left. The locks will be a simple 3 letter code. Once all 8 safes and locks have been opened, you will unlock this trophy. Most of the safes/locks will either have special ammo, inventory upgrades, or weapon attachments/upgrades.

For reference, here is a text guide for all of the safes and locks in the game:

• Safe / Lock #1: West Office / First Floor Police Station (Left Lock) - NED
• Safe / Lock #2: West Office / First Floor Police Station (Right Lock) - MRG
• Safe / Lock #3: West Office / First Floor Police Station - Left 9, Right 15, Left 7
• Safe / Lock #4: Shower Room / Second Floor Police Station - CAP
• Safe / Lock #5: Hallway / Third Floor Police Station - DCM
• Safe / Lock #6: Waiting Room / Second Floor Police Station - Left 6, Right 2, Left 11
• Safe / Lock #7: Control Room / Upper Sewers - SZF
• Safe / Lock #8: Treatment Pool Room / Middle Sewers - Left 2, Right 12, Left 8

If you would like to see a video for the safes/locks along with the rest of the collectibles in the game, please refer to  Lore Explorer.