Onyx Path Publishing will Kickstart a new type of sourcebook for Vampire 5e, one that introduces "the pernicious horror of twisted beliefs".
Gamers in the World of Darkness universe have long experimented with crossovers. It's hard to do without making some sacrifices, though, as the various supernatural powers in the multiple settings are designed to be at odds with one another.
They Came from Beneath the Sea! is a B-movie setting, the 1950s to the max, written by Matthew Dawkins.