- Script Fic Calvin & Hobbes: The Series: Has had several: "Home Un-Alone", "Full Moon: Full Baloney!", "The Great Halloween Heist", "Pranking the Ghosts"...
- Soda at 70 Proof: The first chapter takes place on Halloween. Rachel and Fanny go to a bar to get drunk on soda.
- Boldores And Boomsticks (Pokémon & RWBY): Got one in 2020 in the form of an apocyphal chapter set after Team RWBY returns to Remant. It depicts Adam attacking Blake at the Fall of Beacon. He kills the rest of the team... only for the story to reveal it's all an illusion made by Shade. It culminates with the illusionary Blake becoming a Necromancer and attacking Adam with a legion of zombies before he is arrested.
- The Silver Raven (Devil May Cry & The Owl House): has a one-shot story released on Halloween titled Hallows' Eve Havoc
, where ghosts from the lower circles of Hell invade the Boiling Isles for candy during the final week of October (known to the isles dwellers as "The Week of Samhayne"). The plot of the one-shot sees Lilith and her son, Nero, having to deal with the invading spirits. - Time Fixers: Nicktoons of the Future has a Halloween episode separate from the main series titled Tales from the Scare Zone, in which Crash and Twitchy introduce scary stories to the readers.
- Facing the Future Series: Royal Occupation takes place around Hallowee when Prince Aragon transforms Amity Park into a dark age kingdom.
- Skyhold Academy Yearbook: A meta example in Beauty and the Bloodsucker. Thedas doesn't have Halloween, nor even a known equivalent, but the authors wrote this installment as a Halloween surprise for their readers.
- Queen of All Oni: Chapter 12, loosely based on the show's fourth season Halloween episode (though obviously with differences).
- Lincoln's Memories: "A Very Loud Halloween" takes place on Halloween where Lincoln meets Clyde and teaches Lucy to trick-or-treat.
- Hi Neighbor: A series of fics detailing Sharon's interactions with Steve when she was undercover as his neighbor "Kate". In Paws, Steve attends a Halloween party in his Captain America suit and a wolf mask (the theme of the party was bears and Steve was unable to get a bear mask at the last minute). The grandchildren of the person in charge of the party think he's too short to be Captain America which Sharon is amused by.
- Abraxas: Empty Fullness: "Come Little Monster, I'll Take Thee Away" (explicitly stated by the author to be non-canon to the Abraxasverse) sees Monster X get shrunken to a human size, stay with the Russells in the leadup to Halloween, and celebrate the holiday with the Russells and the Chens via spooky movie marathons, food, and Monster X going as theirself when they go out on Halloween night.
- The Junior Officers chapter "Scary Stories to Tell in the Dead Sea" takes place close to Halloween.
- This Bites!: Has two.
- The first Halloween special was written by CV12Hornet, one of the "Cross-Brains" that work on the story. It involves the Straw Hats landing on a mysterious island, only for some of them to get sick because the island was storage for nuclear waste made by a pre-void century society.
- The second, The Halloween Holiday Not-So-Horrorshow!, features a more traditional Halloween story with the Straw Hats and their allies ending up in Halloween Town from The Nightmare Before Christmas thanks to BROB, all while turning into their Halloween costumes.
- The first Halloween special
- Pokémon Reset Bloodlines:
- "Shadows of the Jungle" is an Apocalyptic Log written by a scientist leading an expedition to Guyana in search of a Legendary Pokémon. As they progress into the depths of the jungle, the team is attacked by incresingly vicious swarms of Bug-types, and the members go missing or are outright killed one by one.
- "Agatha & Sam Gaiden" features Elite Four Agatha and Samuel Oak when they're young rookies, as they travel through Drowning Woods in Johto. When Agatha's younger brother goes missing, the pair has to face hordes of Ghost-type Pokémon to try and find him to get out before it's too late.
- Ruby and Nora: The first story in the series is “Ruby’s Birthday”, which is canonically All Hallows' Eve.
- Snowflake!: The fifth chapter of has Yang and Weiss going Trick-or-Treating with their daughter.
- In chapter 8 part 7 of SlifofinaDragon's Sengoku Basara modern day fanfic Having fun while you can, Date Masamune and Sanada Yukimura's son Masa has a party on this day with his friends.
- Chaos Effect: Makes use of two-part Filler Arcs that pop up whenever Halloween approaches in real life, interrupting the story for their sake, to the annoyance of Edwin.
- The first one is right before Battle City, wherein a self-righteous superhero fanboy named Parker decides to punish society for its fascination with villains by causing everyone who dresses up as one to become their costume so he can beat them up by transforming into heroes to fight them. Edwin is not at all impressed with this, and tricks him into becoming Lord Zedd so that Edwin and several others can become Power Rangers to kick his ass.
- The second one occurs before the Battle City finals, as Parker escapes prison to take revenge. He does this by teleporting them into an old horror movie and transforming them into classic movie monsters, expecting this to drive them to evil acts and somehow convince them that his views are right. Naturally, this doesn't happen, as the only one who acts remotely evil is Edwin (and that's only because he's the Invisible Man and the invisibility is driving him insane), and he quickly scares Parker enough that he undoes the transformation.
- The third one occurs during the Battle City finals, with Edwin and the others crossing paths with Mystery Inc. when the latter visit Japan.
Unsorted
- All Hallow's Eve from Sister Floriana doubles as this and the 50th chapter Milestone Celebration.
- The Adventures of Irving and Friends had "The Grim Albert" and "The Irving Zone".
- Go Jyu Sentai Gigaranger has a chapter titled Time and Punishment, which is the Treehouse of Horror segment In Name Only, as it starts out like it only to have Garzooka fail to prevent Abraham Lincoln's assassination.
- Gamma Cavy's paired post-canon ficsBond Snapshots: Daisuke and Bond Snapshots: Satoshi have the costume party where the title characters go as themselves and get lost of compliments on the reality of their costumes.
- Literary Challenge #68: STO Halloween on the Star Trek Online forums prompted the forum's stable of writers to talk about either Halloween or alien equivalents. Results ranged from a Shout-Out-ridden Halloween costume party (worffan101's entry) to a Klingon ghost story ("The Tale of K'reb epetai-Ruztah" by catrie) to two fics either partially or fully written by starswordc, "Remembrance of the Fallen" (collab with Takeshi6) and "To Absent Friends" (starswordc by himself), dealing with a Bajoran version of the Latin American Day of the Dead.
- The third volume of the Contractually Obligated Chaos series sees Lydia and Beetlejuice celebrating Halloween by running a haunted attraction.
- The New Adventures of Invader Zim has Episode 16. As Halloween approaches, Norlock summons up an army of monsters and demons to invade the city in order to prove his worth to Zim and as a distraction from stealing the pieces of the Meekrob crystal.
- In Son of the Western Sea All Hallows' Eve is the time when the power of the Celtic gods is at its greatest in the mortal world, and one of the times The Wild Hunt rides out from the hills. It is also the time where the Mist is at its weakest, if not completely down, allowing mortals to see the Hunt. However, their minds will eventually attempt to rationalise it and they will not remember the truth. Percy being Percy ends up getting dragged along with one of the Hunts chasing the Twrch Trwyth across Ireland..
- Sonic Studio:
- The maker of Sonic Studio has done a piece of Halloween-themed sprite art. Sonic, Knuckles, and Tails are in a graveyard, with Tails holding some candy in a tree and Sonic having carved an Eggman-themed pumpkin.
- There's a gif of Eggman dressed as Sonic and holding a bag of Halloween candy.
- The series of chapters titled Ghosts in Young Justice: Darkness Falls. It takes place on Halloween and deals with trick or treating, scares, and an Adult Fear of the Bat Family.
- For the Glory of Irk
- Chapter 34 takes place on Halloween. Most of the aliens are confused by the concept (with Lor in particular constantly getting it mixed up with other holidays; at one point, he puts up a Christmas tree), though most of them getting into the spirit of it and putting costumes on and joining the festivities.
- Chapter 68 is this, as well as a Wedding Episode, as Dib and Lor wanted a Halloween theme for their wedding. As such, the chapel is set up like a Haunted House, and everyone is in costume instead of formalwear.
- Spooky: Multi-part comics happen every October, usually focused on the four participating in festive activities.
- The Punch-Out!! fanfic Ma Fille has a chapter aptly titled "Halloween", where the boxers box in costumes and it is proven that Glass Joe will fall for any jumpscare. Notably, it is the first chapter to feature Super Macho Man.
- Fire Emblem: Three Houses: Fifth Path features a non-canon Omake that takes place during Halloween.
