I have run both of the previous editions of Achtung! Cthulhu (at least one one-shot of the Fate edition first, and then a year or two later a short Savage Words campaign using the Savage Worlds/Call of Cthulhu edition), and I am very happy with what I see so far of the new 2d20 edition.
A couple of things occur to me as I read it. It wouldn't be difficult at all to run a number of different weird pulp games with these rules. So, for instance, you could run Trey Causey's Weird Adventures RPG setting pretty easily with this rules set. I have run it before using Fate, and the spread of character archtypes in A!C 2d20 should work. It's probably pretty straightforward to create additional archetypes too.
What will I use A!C 2d20 for first? Possibly some WW II one-shots. I am reading Laurent Binet's novel HHhH about the commando operation to assassinate Reinhard Heydrich, and I have Basil Davidson's memoir, Scenes from the Anti-Nazi War, about has work with the SOE in Italy and Yugoslavia, so plenty to work with there.
But I have a big idea in mind over the longer term, which is to run a campaign featuring the PCs as members of the anti-fascist International Brigades during the Spanish Civil War. There is a lot to work with there, and last year the ultimate reference book on the International Brigades came out: Giles Tremlett's The International Brigades.
