S tier
movement-noiseCrouch indoors33 dB in one recorded run, with an indoors modifier of -8 dB in that same run. Lowest documented movement reading.
Player decision Default movement inside houses, the hospital, and any building with a patrol outside. Press C. Press C while running if you need the slide into a crouch.
B tier
movement-noiseWalk outside52 dB while walking outside in the same recorded run. No separate sprint number was captured, and sprinting is described as louder than this walk.
Player decision Use it on open ground when no monster is close and the exit is short. Crouch again as soon as you reach a building or hear a patrol.
D tier
movement-noiseDriving81 dB while driving in that run. Loudest documented travel state, still below the way unsuppressed gunshots are described.
Player decision Take a car only to close a known gap to a green WAY OUT. Park before you call extraction. Do not joyride the town.
