Achtung! Cthulhu 2d20 - Unexplored PDF


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A War On All Fronts...

We shall fight on the beaches, we shall fight on the landing grounds, we shall fight in the fields and in the streets, we shall fight in the hills; we shall never surrender. – Winston Churchill

WW2 and the Secret War is fought on many fronts, on Earth and beyond it. In Achtung! Cthulhu Unexplored, visit the places the agents normally travel over - the “roving red line” – or avoid!

Enable agents to discover new wondrous horrors hidden beneath the earth in the deepest caves and let them scale the highest peaks where no human has set foot for aeons.

The Old Ones and Axis war machines are not always the imminent threat to Agents: the weather, hunger and thirst will kill as easily as a bullet.

Within this 144-page, full-colour, PDF is a veritable cornucopia of information for the GM to run games where the Agents must battle their way through often-hostile environments!


  • The various Earth-based battlefronts of the Secret War, the European Theatre and the Pacific Theatre are described in Achtung! Cthulhu Unexplored.
  • Chapters on the major biomes: Caves and Caverns, Deserts, Forests, Jungle, Plains, and Mountains and Hills.
  • Vital intelligence for the GM, to enable Agent survival and the traversal of the various biomes of war: the hazards, terrain, and inhabitants.
  • How to create random terrain and create a memorable travel experience for Agents.
  • Encounters, experiences, and enemies!
  • Exploration rules for “redlining” and those moments when the events go off-mission!
  • Missions and adventure seeds for each biome.

The threat of Black Sun, Nyarlathotep, and the Old Ones can’t be ignored, yet from the highest peaks and deepest oceans crawl a myriad of new terrors awoken by this terrible conflict. We must be vigilant, and that means taking the battle to those little-explored places! – Alec Towton

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

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