These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Nightmare Fuel: This game is basically one giant oil gusher of Nightmare Fuel, usually with a good dose of Body Horror thrown in.
Angels of The Unsated One - an entity of all-consuming hunger. Two beautiful angels, wings and all, completely soaked in blood, lovingly tearing off strips of each others' flesh and eating it. GAH.
Players once ran to try to interrupt an evil ritual, and arrived too late to find the sacrificial victim with yards of his intestines pulled out his body and strung up into the tree branches. The players had to reach into the intestine-pile (which was made of stuffed sausage casings and fake blood) to retrieve the ritual scroll to determine what happened. One player, who works as an EMT, described the scene as highly accurate.
Early on in the game, some people (a doctor, an emt, a tavernkeep, a bio teacher) went to a nearby town to mercy-kill the residents to prevent them from incurably becoming ghouls due to cannibalism. Not only were there real OOC nightmares, but there was real OOC throwing up afterwards. For several of the folks who went, that was a character defining experience.