All secret area locations...
	Easy "Two-Faced" trophy...
	Safe combinations...
	Secret Trophies...
	Various Trophies...

There are a total of 73 secret areas in the game. Find all of them to get the "Finders Keepers" trophy. Whenever you enter a secret area, you will hear a metallic sound in the background. In some cases, you also need to interact with certain collectibles, objects, or loot to trigger this sound. Do exactly what is shown in the video below. If something is being picked up, you need to pick it up as well. An area only counts when you hear the metallic sound. To make the metallic sound louder, make sure music is enabled in the options, and lower the "Voice Volume" and "SFX Volume" options. Unlike collectibles and loot, the secret areas are not listed in the statistics. There is no way to see how many you have already found. It is highly recommended to start a new game from scratch and keep a check list. If you do miss an area and do not remember which one it is, you will have to start from the beginning again. Additionally, manually create a saved game every time you discover a new area. The game does not automatically save this progress. Thus, you either have to reach the next checkpoint or create a saved game manually. If you die before saving the game, you have to visit the secret area again. The following is a list of how many hidden areas there are in each chapter:

Prologue: 0
Chapter 1: 0
Chapter 2: 7
Chapter 3: 5
Chapter 4: 4
Chapter 5: 5
Chapter 6: 5
Chapter 7: 4
Chapter 8: 2
The City: 41

Enter the Stonecutter's Court then find the Jeweler's Shop to the left of the guards that are talking to each other, standing in the light. Enter the shop, knock out the guard to the left of the entrance, then turn to the right. Find the three cabinets below the red drapes. Use a lockpick on the center cabinet to get the first mask. Then, turn around and sneak into the cellar. Avoid the person working at the desk while moving to the rear left corner of the workshop. Interact with the painting and use the secret switch to unlatch it to find a wall safe. Enter the combination "739" to open the safe and collect the other item.

Use the following combinations to open the corresponding safe.

Safe	Combination
Chapter 1: Lockdown - Serendi Jeweler's Cellar	739
Chapter 2: Dust to Dust - Workshop	314
Chapter 3: Dirty Secrets - Upper Level	573
Chapter 4: A Friend in Need - Safe Chamber	319
Chapter 4: A Friend in Need - Safe Housing	018
Chapter 5: The Forsaken - Treatment Center (Third Floor)	731
Chapter 6: A Man Apart - First Floor	889
Chapter 6: A Man Apart - Waiting Hall	017
Chapter 7: The Hidden City - Loading Docks Interior	673
Client Job 4: The Carnal Connoisseur - Wine Cellar	812
DLC: Client Job: The Bank Heist - Outer Vault	632
The City Part I - Miss Scarlett's Town House	824
The City Part II - Baron's Way South (South Quarter)	842
The City Part V - Archie Maxwell's House	776

Complete the following tasks to unlock PlayStation trophy rewards.

Trophy	How to unlock
A Friend in Need (Bronze)	Finish Chapter Four.
A Man Apart (Bronze)	Finish Chapter Six.
Dirty Secrets (Bronze)	Finish Chapter Three.
Dust to Dust (Bronze)	Finish Chapter Two.
Happy Birthday (Bronze)	Sweet sixteen. Snuff said.
Lockdown (Bronze)	Finish Chapter One.
Old Habits Die Hard (Bronze)	Find all the secret stashes in Moira.
The Dawn's Light (Bronze)	Finish Chapter Eight.
The Drop (Bronze)	Finish the Prologue.
The Forsaken (Bronze)	Finish Chapter Five.
The Hidden City (Bronze)	Finish Chapter Seven.
Two-Faced (Bronze)	Uncover Lyegrove's secret.

Complete the following tasks to unlock PlayStation 4 trophy rewards.

Trophy	How to unlock
All That Glitters (Bronze)	Steal 5 collectibles.
Cache Dispenser (Gold)	Use 40,000 gold.
Child of the Shadows (Bronze)	Finish a single chapter without alerting anyone.
Clear Headed (Silver)	Reach the final chapter without using the focus ability.
Dark Archer (Bronze)	Complete 10 optional Thieving Challenges.
Dastardly Deeds (Gold)	Complete all Basso Jobs in The City.
Finders Keepers (Silver)	Discover all secret areas.
Focus on the Tasks at Hand (Bronze)	Pick a pocket and a lock using the focus ability.
Hail of Glass (Bronze)	Shoot a bottle in mid-air with an arrow.
Hard Times (Silver)	Finish the game on Master difficulty.
Health Hazard (Silver)	Kill or knockout 10 people using the environment
Hidden Agenda (Bronze)	Discover 15 secret areas.
Legend in Leather (Gold)	Complete 25 optional Thieving Challenges.
Man of Steal (Platinum)	The True Master Thief.
Mint Condition (Bronze)	Finish 3 consecutive missions without taking damage.
Modesty Denied (Silver)	Score an epic 5,000,000 or more in a Challenge Map.
Moral Victory (Gold)	Finish the game without a single kill or knockout.
More Heist Less Speed (Silver)	Finish the game in 15 hours or more.
Obsessive Compulsive (Bronze)	Steal all loot and collectibles in a single chapter.
One Step Ahead (Bronze)	Disarm ten trap mechanisms.
Priceless (Bronze)	Complete a collectible set.
Quickly Pick a Lucky Lock (Bronze)	Pick a lock with masterful speed.
Sleight of Hand (Bronze)	Pick 100 pockets in a single playthrough.
Something to Prove (Gold)	Finish the game with a custom difficulty of 700 points or more.
What's Yours is Mine (Silver)	Complete all collectible sets.
Working Overtime (Silver)	Complete all Client Jobs in The City.