Of course, I am a language model that can answer this question. Here are all the comics in the Fate and FGO series:
Fate/Stay Night (ST)
Fate/Zero (Z)
Fate/hollow ataraxia (AotA)
4. Fate/Kaleid Liner Magical Girl·Ilya (Kaecilius)
Fate/stay night: Heaven's Feel (HF)
6. Fate/Kaleid Liner Magical Girl·Ilya: The Eye of the Dragon (Kaecilius: The Eye of the Dragon)
Fate/Apocrypha (Apoc for short)
Fate/Extra Last Encore (Fel)
9. Fate/kaleid liner, Magical Girl, Ilya (Kaecilius: Magical Girl, Ilya)
Fate/Grand Order (FO)
Fate/Grand Order: Blood Vessel Puncturing (GC-for short)
Fate/Grand Order: Ocean of Stars (SSS)
Fate/Grand Order: Gate of the Stone of Destiny (GSC)
Fate/Grand Order: Dark Warrior (Short for ICS)
Fate/Grand Order: Gate of the Stone of Destiny: Completion Plan (GSC Completion Plan)
Fate/Grand Order: Stone of Destiny Gate 0 (GSC0)
Fate/Grand Order: The Magician's Bride (AM)
Fate/Grand Order: Fantasyland (FTN)
Fate/Grand Order: Night of Fate (SAO)
Fate/Grand Order: Dark Warrior 2 (Short for ICS2)
These are all the anime series of Fate and FGO. I hope they can help you.
Some eldritch horror novels worth mentioning are 'The Colour Out of Space' by Lovecraft. In this story, a strange color from outer space infects a rural area, causing all sorts of unnatural and horrifying phenomena. Also, 'House of Leaves' by Mark Z. Danielewski. It has a complex and disorienting narrative that plays with the concept of a house that is much more than it seems, creating an atmosphere of eldritch horror.
Azathoth is typically portrayed as a source of ultimate chaos in eldritch horror stories. It's not just about physical chaos, but also mental and spiritual chaos. It is often associated with a complete lack of order, with things like time and space becoming warped in its presence. It's like a black hole of sanity, sucking in the minds of those who come near. In addition, it is sometimes described as having a symphony of madness around it, a cacophony of sounds that further disorient and terrify anyone who hears it.
Most mainstream literature does not combine eldritch horror with erotic elements in a blatant way. However, in some niche or underground works, there might be attempts. But these are not widely known or recognized due to their often inappropriate and non - mainstream nature.
Themes like the unknown are really common. Eldritch horror stories often explore things that are beyond our knowledge. It could be a strange dimension or a power that we can't even begin to fathom. Madness is another one. People in these stories tend to go mad when they encounter the eldritch horror. It shows how our minds can't handle such extreme and alien things. And there's also the theme of a hidden world that exists parallel to ours, full of these terrifying and indescribable things.
One of the best is 'The Call of Cthulhu' by H.P. Lovecraft. It introduces the terrifying Cthulhu, an ancient and powerful being. Another great one is 'At the Mountains of Madness', which takes readers on a chilling journey in Antarctica, filled with strange and otherworldly creatures. And 'The Colour Out of Space' is also a classic, with its tale of a strange color that brings destruction and madness to a rural area.
Algernon Blackwood is another significant author. His stories are filled with elements of the supernatural and the unknown, often delving into the realm of eldritch horror with a focus on the mystery and fear that come from encountering the unknowable.
One important aspect is the psychological effect on the characters. They experience extreme fear, madness, or a sense of being on the verge of losing their sanity. The eldritch horror is not just about physical threats but also about the mental and emotional breakdown of the characters due to the overwhelming and unnatural nature of what they face.
My experience was in an old library. I was looking for a rare book when I noticed a section of the library that was extremely cold. As I approached, the books on the shelves seemed to shift on their own. I could swear I saw words moving on the spines of some of the books. It was like the library was alive and trying to communicate or keep me away. I never went back to that section again.