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Achtung! Chtulhu 2d20: Operation Cold Threshold (PDF)


Welcome to Christmas in July! In celebration, this digital title has been marked down by up to 40%! For more of Santa's savings, visit our Christmas in July sale page.

A Prehistoric Monster Entombed in Ice!


It is March 1940 and Nachtwölfe has dispatched a secret expedition to an uncharted island colloquially known as Threshold in the US territorial waters of the Bering Strait.

Intercepted intelligence has alerted Section M to the expedition’s presence and agents are recruited as part of a joint Anglo-US mission to investigate and interdict. They must make a dangerous crossing to the island, traverse the challenging terrain and fearsome weather, navigate perils and predators and infiltrate a mysterious excavation site.

But what has drawn Nachtwölfe to this obscure islet which separates Alaska from the USSR ? Who is the mysterious Professor Sauber, the scientist leading the expedition and why are the Night Wolves so desperate to recover whatever lurks forgotten beneath the ice?

When it is finally released from its frozen prison, how will the agents deal with a prehistoric monster that has been created by long lost Mi-Go technology? Will they be able to stop it before it escapes to prey on ports and shipping in the Pacific? And how will the Deep Ones respond when they learn of this newly escaped Mi-Go threat?

Find out in Operation Cold Threshold!


  • A 21-page adventure for 4-6 experienced agents in both standard and printer friendly formats
  • Mixes survival, exploration, investigation and combat to suit all play styles
  • How will you deal with a monstrous new ocean-going threat?
  • Optional fourth act for extra mayhem!
  • Features maps to enhance the playing experience for both players and GMs with FREE Digital map pack 

Requires the Achtung! Cthulhu 2d20 core books to run.

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April 6th, 2024
We have a new group of experienced players who are trying Achtung! Cthulhu and this is the fourth scenario we've run through now. This took us about seven hours (we admittedly are not a very quick group and we have the odd stop while we get rules strai [...]
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Product Information
Silver seller
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File Size:
316.11 MB
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File Last Updated:
October 16, 2023
This title was added to our catalog on October 17, 2023.