SKU: 26709315792

Achtung! Cthulhu 2d20 Gamemaster's Guide

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Achtung! Cthulhu 2d20 Gamemaster's GuideDirect the course of the new Secret War! Welcome to the Secret War in this fast paced pulp influenced rollercoaster of an RPG that nimbly mixes the sanity challenging terror of Lovecraftian cosmic horror, with the chaos and heroism of World War II. As a gamemaster you will bring to life this pulp influenced world of brave Allied heroes and dauntless two fisted adventure, guiding the heroic actions of players while also directing the twisted might of

Direct the course of the new Secret War!

 Welcome to the Secret War in this fast-paced pulp-influenced rollercoaster of an RPG that nimbly mixes the sanity-challenging terror of Lovecraftian cosmic horror, with the chaos and heroism of World War II. 

As a gamemaster you will bring to life this pulp-influenced world of brave Allied heroes and dauntless two-fisted adventure, guiding the heroic actions of players while also directing the twisted might of the Nazi occult: the Cult of the Black Sun, who wield foul magic and summon captive horrors and Nachtwölfe, their rivals who place their trust in Atlantean technology, weird science, and strange wonder weapons. 

You will shape a world where dread secrets and powerful artifacts lie forgotten in ancient ruins, where dusty tomes are replete with eldritch knowledge, and you’ll arm players with experimental technology, deadly weapons, and powerful magic, to do battle with this uncanny threat. 

You’ll bring to life exotic races like the Deep Ones, undersea worshippers of the dreaming god Cthulhu, or the strange Mi-Go, fungoid-insectoid beings who have come to Earth for an unknown purpose. You’ll also control the sanity-sapping monsters, entities, and gods of the Mythos themselves, who seek to take advantage of the chaos of the second world war to extend their dominion over the minds of men. 

Will your players prevail against all odds, or will they, like so many others before, fall to the malign influence of the Mythos? That is your story to shape and tell… 

Inside this Gamesmaster's Guide 260+ page full color US Letter sized hardback you’ll find: 

  • Dedicated advice on the art of gamemastering including managing the game economy and specific tips for creating memorable characters, adventures, and campaigns to thrill and delight your players. 
  • Major new lore and detailed background information on the six major factions contesting the Secret War: Section M, Majestic, Black Sun, Nachtwölfe, the Deep Ones, and Mi-Go including their backgrounds, history, hierarchy, secret bases and missions, and goals. 
  • A vast repository of hidden lore and forbidden magical knowledge including new Mythos books and tomes, powerful ritualistic magic, plus the damnable spellbooks of Nyarlathotep, Yog-Sothoth, and dread Cthulhu himself! 
  • Arm your players with a wealth of new weapons and espionage devices from secret government labs and classified research departments with the Secret Weapons of the Secret War chapter. 
  • Complete profiles and statistics for the powerful heroes and villains of the Secret War, the men, and women who do battle for the fate of mankind, plus a huge bestiary brimming with all the terrifying gods, monsters, and entities of the Mythos themselves.

You'll receive a FREE GM's Guide PDF right away. 

NOTE! The Achtung! Cthulhu Player's Guide contains the full core cinematic 2d20 rules for actual play and you’ll require that to play the game.

What is Achtung! Cthulhu?

Achtung! Cthulhu is a setting for Lovecraftian roleplaying during World War II, which allows players to discover the truth behind the malign influence of the Mythos on the Nazi war machine and beyond, as conflict engulfs the globe from 1939 to 1945.

In this pulp-influenced world of brave Allied heroes and dauntless two-fisted adventure, players will take on the roles of Allied servicemen and women, secret agents, members of the resistance, or even hapless civilians caught up in the wider conflict. All stand firm against the twisted might of the Nazi occult: the Cult of the Black Sun, who wield foul magic and summon captive horrors in their bid to unleash Yog-Sothoth and Nachtwölfe, their nominal allies and rivals who place their trust in Atlantean technology, weird science, and strange wonder weapons to prevail.

Players will experience a world where dread secrets and powerful artifacts lie forgotten in ancient ruins, abandoned sites, and forgotten cities, and peer deep into dusty tomes and manuscripts seeking to understand eldritch knowledge that was never meant for the sight of mortals. They’ll arm themselves with experimental technology and deadly weapons and learn to wield powerful magical spells or harness potent psychic powers to fight against this uncanny threat.

They’ll also encounter exotic native races like the Deep Ones, undersea worshippers of the dreaming god Cthulhu, or the strange Mi-Go, fungoid-insectoid beings from the furthest corners of the solar system who have come to Earth for an unknown purpose. Towering over them all are the monsters, entities, and gods of the Mythos themselves, who seek to take advantage of the chaos of the second world war to extend their dominion over the minds of men.

Will your heroes prevail against all odds, or will they, like so many others before, fall to the malign influence of the Mythos? That is your story to tell…

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SKU: 26709315792

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E.M. Bristol
Charlottesville, US
★★★★★ 5
Addictive as almond M&M's
Format: Paperback
I once read a book that blew the whistle on the abuses in the system that produces young elite figure skaters and gymnasts. One mother said of another mother that she was very likeable, but she'd cut your throat behind your back. That describes a lot of Freida McFadden's heroines (and their besties) to a t. At least one of the following always occurs in these novels. 1. If someone says, "Eh, I'm sure it's nothing," it's not. If someone believes their husband is too busy working to have an affair, he isn't. If someone suspects a knife is missing from the block, it is. 2. If a child or teen bitterly complains of being a victim of peer conflict, there's a good chance he/she is the instigator. They may even have committed or assisted in a murder in the past. 3. At some point, you will be told point blank that the character you have just spent a good chunk of the book with is the polar opposite. And even if you're familiar with the books, it may come as at least a partial surprise since this doesn't occur in most novels. 4. Everyone in the book has a secret, even if it's just hair dye. 5. There's also what I call the "Cold Case" rule: Don't argue near stairs. Ever. But I digress. At first, happily married to a great guy Naomi Roth doesn't really protest when her husband Jeremy, after having changed the locks, insists that she go and stay at the apartment he bought for his now-deceased parents. She believes, despite a few stray doubts, that he is telling the truth when he says that it's just renovations and that it will be better this way - and he's even thoughtfully packed for her. However, soon after that, Naomi is told in no uncertain terms that Jeremy wants a divorce, which makes her a pariah with her fellow mothers, except one. Is her husband having an affair, and if so, what secrets does his mistress have? And who the heck committed the murder in the preface (there's almost one in every book, so it isn't much of a spoiler)? As always, the author makes writing fiction look effortless, which if you've actually sat down to write some, know it usually isn't. Another addictive read.
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Reviewed in the United States on May 27, 2026
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Rhea
Los Angeles, US
★★★★★ 4
Calling all Freida Fans!!!
Format: Kindle
4.5 stars!!!! Mrs. Freida McFadden Fans!!! This book was soooooo good!!! I started reading last night thinking I will read a few chapters before bed. Well, it is 2am 😊 so, I couldn’t put it down. All the characters are despicable…but it a good way. I had this one figured out; I did, and BAM! No I didn’t…then, twist after twist after oh s*** twist!!! Poor Ezra…sweet little Teddy….the rest, all despicable, but like I said; in such a wonderfully twisty way!!! Naomi husband decides out of nowhere he wants a divorce. She later finds out there “is” another woman; Veronica. Their son Teddy gets shuffled back and forth from Jeremy's house to Naomi’s apartment, and……
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Reviewed in the United States on May 28, 2026
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jojonick
Lowell, US
★★★★★ 5
Heartbreaking and beautiful
Format: Kindle
This book reads like living. I was able to be Sybil, not just observe her. I found the experience of reading her story authentic and cathartic in a way. At the middle of my life it provoked a sense that’s there can be goodness and purpose in aging.
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Reviewed in the United States on May 25, 2026
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Kindly Said
Pawtucket, US
★★★★★ 4
Beautifully written and unique conversational format
Format: Hardcover
This was a great read—sad, but very well done. I really enjoyed the conversational format, since I’ve never read a book told in quite that way before. It felt fresh and different, and the writing was excellent. Overall, it was a very engaging and memorable book.
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Reviewed in the United States on May 28, 2026
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Terri R
Grantham, US
★★★★★ 5
a life in letters
Format: Kindle
What a moving story. I thought I would be bored reading someone’s correspondence, I was not. This is a well written, interesting and moving book. A life in letters. Loved it.
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Reviewed in the United States on May 28, 2026

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