Castle Bravo is a stand-alone Purist Trail of Cthulhu adventure set in the Atomic Age.
It’s March 1954. The Investigators are sailors and scientists deployed aboard the USS Bairoko to the South Pacific as part of Joint Task Force One to participate in a series of secret thermonuclear test shots in the Bikini atoll called Operation Castle. After the first detonation, the PCs will have more than just radiation to fear…
You can read a Castle Bravo actual play here.