Discover the secret history of World War Two: stories of amazing heroism, in which stalwart men and women struggled to overthrow a nightmare alliance of science and the occult; of frightening inhuman conspiracies from the depths of time; of the unbelievable war machines which were the product of Nazi scientific genius - and how close we all came to a slithering end! The Secret War has begun!

A terrifying World War Two setting for the Call of Cthulhu and Savage Worlds roleplaying games, the Achtung! Cthulhu Keeper's Guide is a full-blown tome of dark knowledge, detailing Allied and Nazi forces and intelligence agencies, key characters and vile creatures, new tomes, secret weapons, artifacts, and equipment, as well as occult organizations and Mythos-based missions.