I'm using "internet horror" as an umbrella term for any horror fiction that presents itself as, or is about, something "found on the internet." This can be anything from a story formatted as a blog post about something terrifying that happened to the author, to cursed image stories like Smile Dog.
I'll start:
Ted the Caver: Originally posted as an Angelfire site that has since unfortunately been taken down. Chronicles the journey of a caver who gradually discovers that the cave he's exploring has something living in it.
The Story of TRAINING.bsp: A blog reminiscing about the author's days exploring strange custom Half-Life maps with his clan. One of these maps takes a sinister turn.
The Dionaea House: A series of emails and text messages about a strange house. Or rather, a strange thing pretending to be a house.
Local 58 has always been one of my favourites for the atmosphere it creates without showing anything actually scary.
SCP also has great horror stories but it can be hard to find them among the more scifi or weird fiction style entries. 3999 is great for being really creative (CW violence, sa). And there's a few others that play audio or something that freak me out.
SCP-1984, the one about the Reagan tape, is the one that creeps me the fuck out. Haunted technology like video tapes and TV broadcasts really get under my skin, for some reason. I can't watch Local 58 because I'll be uncomfortably scared lol
I don't have anything to share that hasn't been shared here already, but man, Ted the Caver is just so fucking good. I remember reading it all in one sitting, it's a really engaging read, better than most horror novels I've read. Except for House of Leaves, which has already been mentioned here too.
im on your bridge goatman
https://www.youtube.com/watch?v=80TXsL2QdsE
I really liked Marble Hornets, it had a unique atmosphere to it. I used to be a bit into creepypastas but I don't remember any of them.
I liked early Marble Hornets, though I remember a point where the people making it seemed to want to do more acting stuff and it declined pretty hard because the acting and character writing weren't great.
The middle chunk of the third act drags haaaaaaard. There's like 15 entries that are just all the characters running around the abandoned campus trying to find each other and it did not need to be that long.
I loved the very ending though, wrapped things up real nicely.
The first season of Marble Hornets is my favorite for how bleak and minimalist it is compared to the rest.
catghost is fun animation about a cat that is a ghost and nothing bad ever happens
There was a very short one of forum discussions between people who had all watched the same pirate show growing up, but I don't remember what it was called.
Candle Cove, right? Someone else linked it earlier in this thread I think
devolves into stupidity towards the end
I feel like that's most creepy pasta tbh
Basically, yeah.
Agreed about the NES Godzilla Creepypasta. It got its hooks into me fast and went strong for a while, but then it utterly failed to stick the landing.
There's some really good stories on the Bogleech creepypasta cookoff.
two of my favorite horror novels, John Dies at the End and House of Leaves (which Dionaea was largely inspired by), were both originally published as blog posts
also just wanna say that i just read training.bsp and that is possibly one of the only good creepypastas
Jvk1166z.esp. One of the better "haunted video game" stories, even if it becomes a bit cliché towards the end.
EverymanHYBRID is a great Slenderverse series with probably the most intricate story and best characters of any similar project.