GenWiki is a list of all the cryptids, entities and legends that have appeared in GenXorcist. Some have appeared more than once, but only their first appearance is listed. Want to see if they appear again? You'll have to read the episodes. See what I did there?
Episode 01 - No-End House.
Episode 02 - The Mad Gasser of Mattoon (also known as the "Anesthetic Prowler," the "Phantom Anesthetist," the "Mad Gasser of Roanoke," or simply the "Mad Gasser") was the name given to the person or people believed to be responsible for a series of apparent gas attacks that occurred in Botetourt County, Virginia, during the early 1930s, and in Mattoon, Illinois, during the mid-1940s. In Mattoon, more than two dozen separate cases of gassings were reported to police over the span of two weeks, in addition to many more reported sightings of the suspected assailant. The gasser's supposed victims reported smelling strange odors in their homes which were soon followed by symptoms such as paralysis of the legs, coughing, nausea and vomiting. (Wikipedia)
Episode 03 - The SCP Foundation - Operating clandestine and worldwide, the Foundation operates beyond jurisdiction, empowered and entrusted by every major national government with the task of containing anomalous objects, entities, and phenomena. These anomalies pose a significant threat to global security by threatening either physical or psychological harm. The Foundation operates to maintain normalcy, so that the worldwide civilian population can live and go on with their daily lives without fear, mistrust, or doubt in their personal beliefs, and to maintain human independence from extraterrestrial, extradimensional, and other extranormal influence. (SCP-Wiki)
Episode 04a - The Russian Sleep Experiment - Russian researchers in the late 1940s kept five people awake for fifteen days using an experimental gas based stimulant. They were kept in a sealed environment to carefully monitor their oxygen intake so the gas didn't kill them, since it was toxic in high concentrations. This was before closed circuit cameras so they had only microphones and five inch thick glass porthole sized windows into the chamber to monitor them. The chamber was stocked with books, cots to sleep on but no bedding, running water and toilet, and enough dried food to last all five for over a month. The test subjects were political prisoners deemed enemies of the state during World War II. Everything was fine for the first five days... (Creepypasta Wiki)
Episode 04b - The Dyatlov Pass Incident - In January of 1959, 23-year-old Igor Dyatlov led a group of eight young Soviet hikers, comprising seven men and two women and mostly university students, into the Ural Mountains, attempting to reach Mt. Ortorten from the small settlement of Vizhai. It took more than three months to locate all nine of their bodies.
They were found about six miles away from their destination, in a forest almost a mile away from their campsite, without their skis, shoes, or coats in approximately -30 degrees Fahrenheit weather. Two of them had fractured skulls, two more had major chest fractures, and one hiker was missing her tongue. Soviet investigators listed the cause of death as “a compelling natural force,” and abruptly closed the case not even a month later. (Atlas Obscura)
Episode 05 - The Slender Man (also known as Slenderman) is a fictional supernatural character that originated as a creepypasta Internet meme created by Something Awful forums user Eric Knudsen (also known as "Victor Surge") in 2009. It is depicted as a thin, unnaturally tall man with a featureless head and face, wearing a black suit. (Wikipedia)
Episode 06a - The Flatwoods Monster, also known as the Braxton County Monster or the Phantom of Flatwoods, is an entity reported to have been sighted in the town of Flatwoods in Braxton County, West Virginia, United States, on September 12, 1952. Stories of the creature are an example of a purported close encounter of the third kind. (Wikipedia)
Episode 06b - Kuchisake-Onna [the Slit-mouthed Woman] is the legend of a Japanese woman, mutilated by her jealous samurai husband who murdered her for infidelity, scarring her horribly and leaving her repulsive. Her jealous Ghost still haunts places in Japan, usually on foggy nights. She wears a surgical mask, and she will approach people and ask shyly: “Anata wa watashi ga utsukushii toomoimasu ka?” (Do you think I'm beautiful?) (Creepypasta Wiki)