The Blue Keycard is a medium-level clearance door key. The following monuments have doors that require the blue keycard:
You can collect a blue keycard from several points of interest. Namely, either of the Harbours, Sewer Branches, and Satellite Dish locations.
Typically, you can find blue keycards on a table in the rooms that require the Green Keycard for entry.
To both retrieve and utilize a blue keycard, you will also need Electric Fuses.
The locked doors at points of interest do not have power, with each card reader being attached to a fuse box, usually a short distance away from the door itself.
Once you insert an electric fuse into the fusebox, you will have a limited amount of time to make it to the door and swipe the blue keycard.
Each blue keycard has a limited amount of uses and will decrease its overall health each time you swipe it through a card reader.
If you’re struggling to find a blue keycard or wish to skip the green keycard puzzles, you can purchase a blue keycard from an Outpost vending machine <Tools and Stuff> for 100 scrap pieces.
Alternatively, you can sell any unwanted blue keycards to the Bandit Camp Shopkeeper for 40 scrap pieces if you have no interest in running the monuments.
For more information, check out our guide on blue keycard locations: