How to get blue card in Rust
In Rust, accessing hidden loot behind locked doors is a thrilling challenge. To unlock these doors, players need the elusive Blue Card. This article provides a concise overview of how to obtain and use Blue Cards in Rust.

Locations of Blue Cards
Blue Keycards are obtained by solving Basic (Green) puzzles found at locations like the Harbor, Outpost, Satellite Dish, and Sewer Branch. Players must use a Green Keycard and an Electric Fuse to solve these puzzles and retrieve the Blue Card from the unlocked room.
The Harbor is recommended as the best location to find Blue Cards in Rust. It offers relatively easy puzzles and can be found in both small and large variations. By solving these puzzles, players can acquire Blue Cards and progress further in the game.

Puzzle Solving
Blue Keycards are used to open blue doors in higher-tier monuments such as the Airfield, Arctic Base, Power Plant, Trainyard, and Water Treatment. These areas often contain valuable loot but may have radiation and scientists guarding them.
Before embarking on your adventure to search for blue cards, you must already possess a fuse to put it into the Electric fuse and a green card to access the room.

Once you insert the fuse into a sparking electrical box, you will supply electricity to a nearby switch.

Once activated, you will need to locate a blocked room, which can be unlocked using your green keycard.

Upon entering, you will discover a blue keycard placed on the table. Additionally, the room may contain loot-filled boxes as a small reward for your patience and intelligence.

Trading
Alternatively, Blue Cards can be purchased for 100 Scrap from the Outpost vending machine for 100 Scrap.

Conclusion
Blue Cards are essential items for unlocking valuable loot in Rust. By solving Basic puzzles or purchasing them, players can gain access to higher-tier monuments and their rewards. With this concise guide, players can confidently embark on their journey to acquire Blue Cards and explore the hidden treasures of Rust.
