From publisher blurb:
Cthulhu has emerged and the world has been irrevocably altered. Everything has been destroyed in this one single event, which the survivors call the Cataclysm.
Since the Cataclysm, technology has collapsed. There is no internet anymore and there are no aeroplanes in the sky. The way that the wandering bands of crazies and cultists describe the destruction is that the Earth has been “cleared off”.
The world is now a post-apocalyptic hell and monsters stalk the land.
This 123-page book provides spells, monsters, NPCs, vehicles, gear, an example scenario, and a library full of uncanny Mythos tomes to continue the fight, even after Cthulhu has been awakened.