The feral ghouls in the Fallout universe have always flirted with being zombies, but they never quite go the whole way there. Putting you in an episode of The Walking Dead (or any given classic zombie flick), this overhaul mod takes ghouls and makes them into a shambling horde of the living dead.
Unfortunately, this PS4 version is a bit stripped down from the PC mod of the same name, but it still gets the job done for console players. Feral ghouls are renamed to zombies, sprinting is disabled, and health is modified so that head shots appropriately take them out. A few animations are also tweaked as well for more of a horror feel.
These modified ghoul zombies also come in big herds that you don't want to get caught in! Needless to say, this pretty drastically changes the feel and tone of a Fallout 4 playthrough. Hiding under a dumpster won't keep you safe here.