In Rust, keycards are one of the most important items for progressing through monuments and getting access to some of the best loot in the game. If you want to find high-tier weapons, valuable components, and advanced gear, learning how to properly use keycards is essential.
There are three different types of keycards in Rust: Green, Blue, and Red. Each one gives access to different levels of loot rooms located at various monuments across the map. However, using these keycards isn’t as simple as just swiping them at a door. Most keycard puzzles require fuses, timing, and sometimes radiation protection.
In this guide, we’ll break down where to find each keycard and how to use them effectively.
Green Keycards
Green keycards are the most common keycards in Rust and are usually the first ones players find while exploring monuments.
You can typically find Green Keycards at lower-tier monuments, including:
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Lighthouses
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Supermarkets
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Junkyards
These monuments are fairly easy to access and are usually safe for newer players to explore. Because of this, they are the best places to start when looking for your first keycard.
There is also about a 24% chance that Wandering Scientists will drop a Green Keycard if you manage to kill them while they patrol around the map. These scientists can appear near roads and monuments, so if you see one walking around, it might be worth the fight.
Green Keycards can also rarely be found inside large crates, but this is not the most reliable way to get one. Your best option is still looting the smaller monuments mentioned earlier.
How to Use Green Keycards
Once you have a Green Keycard, you’ll also need a Fuse to complete the puzzle. Fuses can be found in many locations across the map, including crates, toolboxes, and other loot containers.
After you have both items, head to one of these monuments:
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Harbor 1
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Harbor 2
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Sewer Branch
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Satellite Dish
At these monuments, you will find a Green Keycard door that leads to a small puzzle room.
To complete the puzzle:
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Find the Fuse Box connected to the door (usually nearby).
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Insert the fuse into the box and turn the power on.
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Run to the Green Keycard door before the timer runs out.
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Swipe your keycard on the access panel to open the door.
Inside the room, you will usually find basic but useful loot, including crates, components, and sometimes weapons or armor.
These rooms are great for early-game progression.
Blue Keycards
Blue Keycards are a step above Green Keycards and give players access to better loot rooms at higher-tier monuments.
The easiest way to obtain Blue Keycards is by completing Green Keycard puzzles. Many of the Green puzzle rooms have a desk inside where a Blue Keycard spawns.
If you don’t want to complete puzzles, you can sometimes buy Blue Keycards from the Outpost, although this requires spending scrap.
Blue Puzzle Locations
Blue Keycard doors can be found at the following monuments:
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Airfield
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Power Plant
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Train Yard
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Water Treatment Plant
These monuments are more dangerous than the lower-tier locations. You’ll often encounter radiation, scientists, or other players trying to complete the puzzle.
How to Use Blue Keycards
Just like Green puzzles, you will need a Fuse to power the puzzle.
To complete the puzzle:
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Locate the Fuse Box and insert a fuse.
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Activate the power.
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Run to the Blue Keycard door.
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Swipe your Blue Keycard to open the room.
Many of these monuments also require radiation protection, so make sure you bring proper clothing or armor to reduce radiation damage.
Inside Blue puzzle rooms, you’ll find better loot crates, which can contain stronger weapons, valuable components, and high-tier crafting materials.
Red Keycards
Red Keycards are the rarest and most valuable keycards in Rust. They unlock the highest-tier puzzle rooms in the game, which contain some of the best loot available.
The main way to obtain Red Keycards is by completing Blue puzzle rooms. Sometimes you’ll find a Red Keycard sitting on a desk inside the room.
Another way to obtain them is through PvP. If you manage to defeat another player who has already completed puzzles, you might be able to loot a Red Keycard from their inventory.
Red Puzzle Locations
Red Keycard puzzles can be found at:
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Military Tunnels
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Launch Site
These monuments are extremely dangerous. They are heavily guarded by scientists and often attract many players because of the valuable loot inside.
Launch Site in particular has very high radiation levels, meaning you will need strong radiation protection and possibly radiation pills to safely navigate the area.
Preparing for Red Keycard Runs
Before attempting a Red puzzle, you should bring:
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Multiple weapons
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Plenty of ammunition
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Radiation protection gear
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Radiation pills
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Extra fuses (2–3 recommended)
Red puzzle runs are often contested by other players, so being prepared for combat is important.
If you’re having trouble completing these puzzles solo, it’s a good idea to bring friends or teammates. Having extra players can make it much easier to fight scientists, defend the area, and safely collect the loot.
Why Keycards Are Worth It
Learning how to find and use keycards is a major part of progressing in Rust. While the puzzles can take some time to learn, the rewards are often worth the effort.
Keycard rooms provide access to better weapons, rare components, and valuable loot that can give you a huge advantage over other players on the server.
Once you understand the keycard system, you can start chaining puzzles together using Green puzzles to get Blue cards, Blue puzzles to get Red cards, and eventually reaching the highest-tier loot locations in the game.
Mastering this system is one of the best ways to improve your survival chances and dominate the server.
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