Blue Keycard

The Blue Keycard is a required object used to open doors with a glowing blue keycard lock. Military crates will start to spawn more often in blue puzzle rooms. You will also find red keycards in all the blue keycard puzzles. It can be found in the Satellite Dish, Harbors and the Sewer Branch. They spawn on desks which you can find in the green puzzle rooms. It can then be used on the: - Power Plant (requires an electric fuse and a green keycard to reach the blue puzzle room, for the blue keycard lock, you'll just need another electric fuse and a blue keycard) - Airfield (requires an electric fuse and a green keycard to reach the blue puzzle room, for the blue keycard lock, you'll just need another electric fuse and a blue keycard) - Trainyard (you'll just need an electric fuse and a blue keycard to open the blue keycard lock) - Water Treatment Plant (you'll just need an electric fuse and a blue keycard to open the blue keycard lock) - Small / Large Oil Rig (you'll just need a blue keycard to open the blue keycard lock)