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…
The author is Bill White, who wrote the excellent Ganakagok roleplaying game. Read more about Castle Bravo on his blog.
You can read a Castle Bravo actual play here.
Castle Bravo has now been published alongside The Black Drop, The Big Hoodoo, and Not So Quiet in the Out of Time anthology.