From the campaign:
Inspired by the Cthulhu Mythos of HP Lovecraft, Modiphius Entertainment wants to bring you the Keepers and the Investigator's Guides to the Secret War, for use in the terrifying World War Two roleplaying game setting, Achtung! Cthulhu. Both books are compatible with the Call of Cthulhu roleplaying game, and the first, very easy stretch goal, will allow us to make it compatible with Savage Worlds as well!
With this Kickstarter and your contributions Modiphius will raise the money needed to pay for the development, artwork and production of a full print run of both books in soft back. The first stretch goal will add Savage Worlds rules and stats to both books plus some extra content for everyone; the next will upgrade the Keeper's Guide to a full colour hardcover print run; the next will upgrade the Investigator's Guide to a full colour hardcover print run; while further stretch goals will unlock further books and campaigns, miniatures, and so on - see 'Stretch Goals' below for more details.