There are a total of 73 secret areas in the game. Find all of them to get the "Finders Keepers" achievement. 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.
While crawling through the vents in Chapter two, just after the men discuss disposing a body in the furnace, you can hear the Thief-Taker General whistle Frog's theme from Chrono Trigger.
Easy "Child Of The Shadows" achievement
The best place to complete a chapter without alerting anyone is Chapter one: Lockdown. This chapter is very short and has few enemies. The eye-symbol above an enemy's head must not turn fully red. If it does, they enter combat mode and you are then spotted. If this happens, immediately reload the last saved game. Always stay in the dark, do not shoot any arrows, and do not knock out any enemies. Stay crouched at all times, and use the Shadow Dash to get from one dark area to another when enemies are not looking towards you. Explore the area, and take alternative routes where you do not have to deal with any guards.
Easy "Focus On The Tasks At Hand" achievement
To pick a pocket and lock using the Focus ability, you must first upgrade the Focus ability "Dexterity" to its maximum level. You can buy Focus upgrades from the Beggar's Queen in the northern-most part of The City. After you have upgraded Dexterity, go to the glowing gate around the corner to start Chapter 2 (can be replayed at the same location if you have already completed it). At the beginning of Chapter 2 is a guard with two pockets and a locked door. Activate Focus vision, and pick the guard's pocket, as well as the lock of the closed door to get the "Focus On The Tasks At Hand" achievement. You can then pause the game and select "Return To The City" to return to the Beggar's Queen.
Easy "Hail Of Glass" achievement
You can find a bottle in front of the "Reynard's Coffeehouse" shop (open world) in Clock Tower Plaza. Equip the bottle, and aim into the air right above you. After throwing the bottle, you have 1.5 seconds before it hits the ground. Shoot an arrow when the bottle is close to hitting the ground. The closer the bottle, the better your chance of hitting it. You can also try moving around a little by taking a step to the left or right to adjust your aim if standing still does not work. If you know the bottle often lands to your right, then take a step to the right. Save the game before throwing the bottle so you can quickly reload the game and try again if do not hit the bottle.
Easy "Health Hazard" achievement
The best place to kill or knockout 10 people using the environment is Chapter 3. After entering the brothel, go down the hallway on the right. There is a large opium machine in the middle of the room that will knock out everyone in the entire brothel. To do this, you need to manipulate the machine with the Wirecutter. In the same room is a locked door. Pick the lock to reach a room that leads to the area behind the opium machine. There is a panel on the wall. Open the panel, and cut the wires. Then, return to the room with the machine, and pull the lever to knock everyone out and get the "Health Hazard" achievement. Note: You can buy the Wirecutter from any merchant in The City. Merchants are marked with a white bow and arrow symbol on your world map. You can also replay this chapter at any time.
Easy "Modesty Denied" achievement
The easiest map to score 5 million points on is "House Of Bossoms" in "Chain & Gain" mode. This is a very small map with lots of loot items right next to each other. Start by stealthily knocking out or killing all guards on the entire map. Taking out guards will deduct some points at first, but it makes the whole process a lot easier and is the key to success. The goal in this Challenge mode is to collect all the loot in very quick succession. The quicker you collect everything, the higher your multiplier and the more points you are awarded. Once all of the guards have been defeated, you can focus on collecting the loot without any disturbance. The loot always spawns in the same place -- so you can remember the locations. The goal is to collect all the loot quickly without losing your multiplier. Simply go in every room, use Focus vision for a short moment to highlight all objects, and collect all items. Then, go to the next area until you have a chain count of at least 150. This should guarantee more than 5 million points, as long as you pick everything up quickly enough and maintain your multiplier. This whole process should take approximately 18-20 minutes. Make sure to never let your chain count break. It breaks if you have not collected anything for a minute. Once you have collected all items, go to the green door between the first and second floor to complete the mission and get a huge point bonus for your high chain count. Before completing the mission, you should only have around 2 million points, but once you finish the map, you will more than double the point total due to the bonus points. Note: Most guards have pockets. Make sure to grab their loot after defeating them.
Easy "Obsessive Compulsive" achievement
The best place to steal all loot and collectibles in a chapter is Chapter 1: Lockdown. This chapter is very short and only contains 60 loot items and 4 collectibles. All of these objects are very close together, and you can easily locate their locations by activating Focus vision. Loot and collectibles will then be highlighted in blue. Make sure to search all lockers, drawers, and safes. You will also have to take some hidden alternative routes and climb up some walls. Some collectibles are hidden behind doors. Thus, every time you open a door, close it behind you, and look to see if there is any loot on the ground. If you miss an object, you can either backtrack or pause the game and select "Load - Chapter Start". In your Journal under "Player Progression - Statistics" you can see exactly how many objects you have collected. You will get the "Obsessive Compulsive" achievement at the end of the chapter and not immediately after finding the final item.
Easy "Old Habits Die Hard" achievement
In Chapter 5: Forsaken, "Moira" is the Asylum in the fifth chapter. There are five golden pocket portraits you need to collect to get the "Old Habits Die Hard" achievement. They are all hidden at the very beginning of this chapter, where you need to search for the key to the female ward.
1. Go to the men's ward, and enter the first hall on the right. Climb the tall cabinet on the left to find the first secret stash in an open vent.
2. After obtaining the first secret stash, jump across to the narrow ledge, and go down the hall to find another open vent with the secret stash.
3. Drop down, and go to the back two doors of the second hallway of cells in the men's ward. The last door will be locked, but there is a hole in the wall. Enter the room next to it, and crawl through the hole. Climb up to the vent above the blocked door to find the secret stash.
4. Go to the elevator shaft in the women's ward, and shoot a rope arrow into the anchor point. Climb down, and jump through the gap into the room below. Climb the crates to the left to find the secret stash on a pipe.
5. Climb out of the lower floor through the stairs, then turn left to find a guard room with missing bars. Crawl through it, turn left, and look behind the book shelves to find a closed vent. Unscrew the cover, and immediately turn left to find the final secret stash.
Easy "Quickly Pick A Lucky Lock" achievement
You can pick a lock with masterful speed at any door in the game that has three pins. Save the game before interacting with the door. Then, try to pick the lock and remember the correct combination. Before unlocking the third pin, reload your saved game to be back in front of the door. You now just need to enter the same combination as before in under three seconds to get the "Quickly Pick A Lucky Lock" achievement. If you fail, just keep reloading your saved game until you are successful. Note: If you have already opened a door you want to try this at, return to the Clock Tower (your hideout), and it will get locked again.
Easy "Two-Faced" Achievement
Go into the Stonecutter's Court then discover the Jewelry Store to the left of the guards that are speaking with each other, standing in the light. Go into the store, knock out the guard to the left of the entryway and then turn to the right. Discover the 3 cabinets below the red drapes. Use a lockpick on the center cabinet to obtain the very first mask. Turn around and slip into the cellar. Stay clear of the individual working at the desk while transferring to the rear left corner of the workshop. Interact with the painting and use the secret switch to unlatch it to discover a wall safe. Enter the code "739" to open the safe and gather the other item.
Peephole
In Chapter three, you will enter a secret passageway in the brothel. Look through the peepholes to find a secret code to unlock the door. Then, go to the far right to find a peephole that reveals a couple having sex.
Safe combinations
Use the following combinations to open the corresponding safe.
Chapter 1: Lockdown - Serendi Jeweler's Cellar: 739
The City Part I - Miss Scarlett's Town House: 824.
Chapter 2: Dust to Dust - Workshop: 314
The City Part II - Baron's Way South (South Quarter): 842
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
Client Job 4: The Carnal Connoisseur - Wine Cellar: 812
Chapter 5: The Forsaken - Treatment Center (Third Floor): 731
The City Part V - Archie Maxwell's House: 776
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
DLC: Client Job: The Bank Heist - Outer Vault: 632
Secret Achievements
Complete the following achievements to unlock Xbox Live Gamerscore points.
Achievement
How to unlock
A Friend in Need (5 points)
Finished Chapter Four.
A Man Apart (5 points)
Finished Chapter Six.
Dirty Secrets (5 points)
Finished Chapter Three.
Dust to Dust (5 points)
Finished Chapter Two.
Happy Birthday (15 points)
Sweet sixteen. Snuff said.
Lockdown (5 points)
Finished Chapter One.
Old Habits Die Hard (10 points)
Found all the secret stashes in Moira.
The Dawn's Light (15 points)
Finished Chapter Eight.
The Drop (5 points)
Finished the Prologue.
The Forsaken (5 points)
Finished Chapter Five.
The Hidden City (5 points)
Finished Chapter Seven.
Two Faced (5 points)
Uncovered Lyegrove's secret.
Various Achievements
Complete the following achievements to unlock Xbox Live Gamerscore points.
Achievement
How to unlock
A Moral Victory (100 points)
Finished the game without a single kill or knockout.
All That Glitters (15 points)
Stole 5 collectibles.
Cache Dispenser (100 points)
Used 40,000 gold.
Child of the Shadows (10 points)
Finished a single chapter without alerting anyone.
Clear Headed (30 points)
Reached the final chapter without using the focus ability.
Dark Archer (20 points)
Completed 10 optional Thieving Objectives.
Dastardly Deeds (80 points)
Completed all Basso Jobs in The City.
Finders Keepers (40 points)
Discovered all secret areas.
Focus on the Tasks at Hand (5 points)
Picked a pocket and a lock using the focus ability.
Hail of Glass (10 points)
Shot a bottle in mid-air with an arrow.
Happy Birthday (15 points)
Sweet sixteen. Snuff said..
Hard Times (60 points)
Finished the game on Master difficulty.
Health Hazard (25 points)
Killed or knocked out 10 people using the environment.
Hidden Agenda (20 points)
Discovered 15 secret areas.
Legend in Leather (75 points)
Completed 25 optional Thieving Objectives.
Mint Condition (10 points)
Finished 3 consecutive chapters without taking damage.
Modesty Denied (30 points)
Scored an epic 5,000,000 or more in a Challenge Map.
More Heist Less Speed (30 points)
Finished the game in 15 hours or more.
Obsessive Compulsive (5 points)
Stole all loot and collectibles in a single chapter.
One Step Ahead (20 points)
Disarmed ten trap mechanisms.
Priceless (20 points)
Completed a collectible set.
Quickly Pick a Lucky Lock (10 points)
Picked a lock with masterful speed.
Sleight of Hand (20 points)
Picked 100 pockets in a single playthrough.
Something to Prove (100 points)
Finished the game with a custom difficulty of 700 points or more.
