[Amnesia: The Bunker] All Collectible

For collecting all collectibles you will get 4 achievements:

• Librarian for 52 notes;
  
• Codebreaker for unlocking 11 lockers (need to collect 20 dog tags);
  
• Cartographer for 5 maps;
  
• Pack Rat for 7 pocket bags.

You will need a wrench and bolt cutter to collect everything. You will find the wrench in the locker (you will find the password to the locker while exploring the Maintenance sector). You will find the bolt cutter in one of the cells in the Prison Sector.
Pocket Bags increase the capacity of the inventory. Some Pocket Bags have multiple locations. The guide includes all potentially possible spawn locations.

Central Bunker

Maintenance

Prison

Soldier Quarters

Arsenal

Roman Tunnels

[Sir Nicklas]

This is so great! You, sir, made a high quality content, thank you!

[Dangerous Beans]

The latest update seems to have added a few more possible spawn locations for dog tags.

At the end of my first playthrough I was missing one locker code that I couldn't find despite extensive search. In my second playthrough I found the last code on a dead body in Maintenance, in front of the fuel storage.

[Division]

@Tattered Ribbon I found N Laval's dog tag on my first playthrough which is #17 in this guide so you can take that as reference despite this game being randomised in names/codes except for fixed names/codes.

[Darklizard]

You left out two notes from the prison.

[Mighty Nighty Night Knight]

This is a very well made guide. Thank you.

[Tattered Ribbon]

I've double checked every location for the dog tags and I still can't find Leval's tag to get the gas mask, so there's a location that's missing.

[Division]

2 missing Pocket Bag locations has not been updated in here so I decided to paste my found Pocket Bags from my guide:

I. Central Bunker:
✔ Officer Quarters, Delisle Room: On the hanger
✔ Mission Storage: H Boucher’s Locker

II. Maintenance:
✔ Foreman’s Quarters: Inside the cabinet
Chapel: On the altar

III. Prison:
Cells: Last cell on the left
✔ Storage: First room on the left

IV. Soldier Quarters:
Barracks B: Inside a vent on the side
Mess Hall: In a wall cabinet
✔ Communications: On the chained filing cabinet.

V. Arsenal:
Clerk’s Office: On the table.
Storage Area A: In the very back on a shelf just at the darkest area.
✔ Supply Closet: Blow the door and it will be on the shelf.

VI. Roman Tunnels:
✔ Before the crater: Near the Detonator Handle

[Quiller]

Hey, I had 2 more locations for Pocket Bags that are not mentioned here:
- Prison, 2nd cellar on the right side, on the ground
- Arsenal, Supply closet, on a shelf (had to break the door in)
You're welcome :)

[Homiecrazyness]

you know the games config files readables actually gives you the general area for all the notes as well interestingly

[Exterminatus]

this guide is bad lol