"Cosmic horror: the genre that evades explanation.
It isn't that it can't be defined—rather that, at its core, the main theme surrounding cosmic horror is the unknown. Things so alien and far away from life on Earth that if a person were to view them, it would drive them insane.
This isn't an "invaders from Mars" level of horror—this is an unfathomable aberration from another dimension.
Cosmic horror is also sometimes referred to as Lovecraftian Horror.
Over the years, the genre has evolved with the times, shining light on the horrors that lie just out of our reach. Whether it's set in deep space, or at the bottom of the sea, the common theme is an unexplainable or unfathomable horror.
The films in this list manage to do justice to this notoriously tricky genre: from desert UFO death cults, to a deadly mist crawling with creatures, these films will plant a fear into your brain that will be hard to shift."