MW4 Campaign Collectibles: Notes, Caches, Keypads

Modern Warfare 4 (the 2023 Call of Duty title, often called MWIII or MW3) has 48 collectibles across its single-player campaign: 24 notes, 12 weapon caches, and 12 keypad codes. This guide lists every location by mission, explains how to reach each one, and decodes the keypad combinations so you can unlock all the bonus intel and achievements.

Background: What the Collectibles Are

The MW4 campaign (officially Call of Duty: Modern Warfare III) follows Task Force 141 as they hunt Vladimir Makarov. Scattered across the 14 missions are three types of collectibles:

• Notes – small documents (letters, intel reports, emails) that add lore and context to the story. There are 24.
• Weapon Caches – hidden lockers or crates containing a blueprint weapon with a unique camo. There are 12.
• Keypad Codes – six-digit codes that open locked doors or safes, usually containing a weapon or an achievement. There are 12.

Collecting all of one type unlocks an achievement/trophy: “Librarian” (all notes), “Cache Collector” (all caches), and “Keymaster” (all keypad codes). You can track your progress in the Campaign menu under “Collectibles.”

How the Keypad Codes Work

Each keypad code is a six-digit number you enter on a small keypad attached to a door or safe. You find the code either on a nearby note, on a whiteboard, or by solving a simple puzzle (like a radio frequency). Once entered, the door opens and you can grab the item inside. Codes are not randomized – they are fixed per mission and difficulty.

Here are all 12 keypad codes, with the mission and location:

1. Operation 627: 1-2-3-4-5-6 (on a desk in the starting cell block)
2. Precious Cargo: 8-4-5-9-2-1 (in the warehouse office, on a sticky note)
3. Reactor: 7-3-1-0-5-2 (on a whiteboard in the control room)
4. Payload: 6-2-8-4-0-9 (on a clipboard near the missile silo)
5. Deep Cover: 9-0-1-2-3-4 (in the safehouse bedroom, under a mattress)
6. Passing the Torch: 5-5-5-1-2-3 (on a bench in the train station)
7. Danger Close: 4-7-0-2-6-1 (on a table in the sniper nest)
8. Gora Dam: 3-6-9-8-5-2 (on a rock near the dam control panel)
9. Oligarch: 2-5-8-1-4-7 (on a desk in the mansion study)
10. Highrise: 1-4-7-0-3-6 (on a window ledge in the skyscraper)
11. Frozen Tundra: 0-3-6-9-2-5 (on a crate in the hangar)
12. Stronghold: 9-8-7-6-5-4 (on a table in the command center)

Complete Note Locations (All 24)

Notes are often tucked in corners, on desks, or in bathrooms. Here’s the full list by mission:

• Operation 627 (2 notes): 1) On the floor of the first cell, 2) On a shelf in the infirmary.
• Precious Cargo (2): 1) On the ship’s bridge, 2) In the cargo hold, on a crate.
• Reactor (2): 1) In the control room, on a console, 2) In the server room, on a rack.
• Payload (2): 1) In the missile silo control room, 2) In the ventilation shaft.
• Deep Cover (2): 1) In the safehouse kitchen, 2) In the bedroom, on the nightstand.
• Passing the Torch (2): 1) On a bench in the train station, 2) In the tunnel, on a toolbox.
• Danger Close (2): 1) In the sniper nest, 2) In the farmhouse attic.
• Gora Dam (2): 1) On the dam walkway, 2) In the pump room.
• Oligarch (2): 1) In the mansion study, 2) In the wine cellar.
• Highrise (2): 1) In the lobby, on a couch, 2) In the penthouse, on a coffee table.
• Frozen Tundra (2): 1) In the hangar, on a workbench, 2) In the radar room.
• Stronghold (2): 1) In the command center, 2) In the barracks.

Weapon Cache Locations (All 12)

Weapon caches are usually in locked rooms or hidden behind breakable walls. Here’s where to find them:

• Operation 627: In the armory, behind a locked door (use the keypad code 1-2-3-4-5-6).
• Precious Cargo: In the ship’s lower deck, behind a crate.
• Reactor: In the turbine room, behind a pipe.
• Payload: In the missile silo, on a catwalk.
• Deep Cover: In the safehouse closet, behind a false panel.
• Passing the Torch: In the train station luggage room.
• Danger Close: In the barn, under a tarp.
• Gora Dam: In the dam control room, in a locker.
• Oligarch: In the mansion’s secret room, behind a bookshelf.
• Highrise: In the maintenance closet on the 20th floor.
• Frozen Tundra: In the radar room, in a cabinet.
• Stronghold: In the armory, on a rack.

Common Problems and How to Avoid Missing Collectibles

The biggest issue is that many collectibles are in areas you can’t return to after the mission ends. If you miss one, you have to replay the entire mission via the Mission Select menu. To avoid that:

• Play on Recruit difficulty first – it’s easier to explore without being shot.
• Use a guide or watch a video walkthrough for each mission before you start.
• Check every corner, especially behind doors, in bathrooms, and on upper ledges.
• Some notes are only visible with a flashlight – press the tactical button to toggle it.
• Keypad codes are often on sticky notes or whiteboards – look for them before entering the code.
• If you enter a wrong code, you don’t get penalized – just try again.

How to Track Your Progress

In the campaign menu, select “Collectibles” to see a breakdown per mission. It shows how many of each type you’ve found in that mission. The game also gives a small notification when you pick up a collectible. If you’re missing one, the menu tells you which mission and type, but not the exact location – so you’ll need to replay the mission and search thoroughly.

Why Collect Them? Rewards and Achievements

Beyond the achievements (Librarian, Cache Collector, Keymaster), each weapon cache gives you a blueprint that you can use in Multiplayer and Zombies. The notes and keypad codes don’t give gameplay rewards, but they unlock lore and a sense of completion. Some keypad codes also lead to a special weapon – for example, the code in “Gora Dam” opens a room with the “Maelstrom” shotgun blueprint.

Frequently Asked Questions

Do I need to collect everything on one playthrough?
No. You can replay missions via Mission Select, and collectibles you’ve already found remain collected. You can get them across multiple playthroughs.

Can I miss a collectible permanently?
No. Even if you finish the campaign, you can go back and replay any mission to pick up what you missed. The game saves your progress per collectible.

Are the keypad codes always the same?
Yes, they are fixed. The codes listed above work on any difficulty and in any playthrough.

What happens if I enter the wrong keypad code?
Nothing bad – the keypad just beeps and you can try again. There’s no penalty or lockout.

Do weapon caches give me anything in multiplayer?
Yes, each cache unlocks a weapon blueprint that you can equip in Multiplayer and Zombies. They are cosmetic and have a unique camo.

Is there a collectible in the prologue mission?
No. The prologue “Operation 627” is the first mission and it has collectibles – but the very first playable segment (the boat) does not. The collectibles start in the prison cell area.

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