Hypnotic Screeching is one of the Legends (specifically a Phenomenon) that can be encountered in Nightfall: Cryptic. The Hypnotic Screeching can occur in the Pine Mountains Region.


The hypnotic screeching is a loud, irritating buzzing sound heard when ascending Mount Mammoth. Near the foot of the mountain, it is a low drone, but the closer the player gets to the peak, the louder it becomes. Once the player reaches the highest point on the mountain, the screeching halts to a stop.

How to Locate

To experience this phenomena, simply begin an ascent up Mount Mammoth.


  • Vic Wolfe will note the similarity of the screeching to infrasound, a sound known to cause madness, and a possible explanation of the Dyatlov Pass Mystery.
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Alien Abduction · Bloody Mary · Carnivorous Cloud · Crop Circle · Dead Birds · Disembodied Singing · Disembodied Whispers · Distorted Phone Call · Foo Fighters · Hypnotic Screeching · Lead Mask Incident · Moody's Light · Otherworldly Fog · Rain of Fish · Spontaneous Human Combustion