A Winter Horror One-Shot for 2–6 Players + Keeper

Slope’s End is facing a grisly holiday crisis. Someone, or something, is scattering severed heads topped with Santa hats across town.

Local law enforcement blames a human murderer.

Eyewitnesses claim they saw a winged, long-necked reptile.

And the mayor demands answers before his ideal Christmas tourism season collapses.
Your group is the last line of defense.

A Holiday Escape That Turns Into a Nightmare

Famous for its snowy vistas, glowing decorations and bustling winter markets, Slope’s End promotes itself as the ultimate Christmas getaway.

This year, though, the picturesque town is stained with blood.

The heroes are hired to uncover the truth behind a string of killings threatening to shut down the festivities entirely. What they discover is far beyond a simple slasher:
A hydra, born from a mysterious parcel and secretly raised by an increasingly unstable farmer, is roaming the area. It leaves heads as mating displays, each crowned with a Santa hat to lure a partner.

If it succeeds, its eggs will be fertilized, and Slope’s End will be consumed.

A Darkly Festive, Horror-Laced One-Shot

Have a Merry Decapitated Christmas! is a modern urban-fantasy horror scenario designed for fans of Supernatural, Wednesday, Twin Peaks, Little Shop of Horrors and Gremlins.

Written for Monster of the Week but simple to convert to any contemporary TTRPG, this adventure gives GMs everything needed for a tight, unsettling, gore-splashed holiday tale.

Included in the Module

• Complete Game Master notes
• 20+ pages of encounters and story beats
• Seven clue-rich locations
• Five fully developed NPCs
• A chilling re-imagining of the Hydra
• Map handout
• Optional campaign-length continuation

Adventure Tropes

• New monster

• Aerial predator

• Urban horror

• Deserted theme-park lair

• Modern fantasy mystery

• Holiday horror

• Monster of the Week one-shot

• Christmas

• Santa

Potential Content Warnings

• Decapitation

• Serpentine creatures

• Chemical injury

• Body horror

• Gore woven with holiday themes

Why This Adventure Shines

Keepers gain everything required to run:

• A well-paced winter horror investigation

• Unforgettable NPCs with layered intentions

• A creature that becomes increasingly lethal as combat escalates

• A high-stakes final encounter

• A mystery packed with twists, emotional pressure and warped holiday cheer

Ideal for a seasonal one-shot at home or a convention slot, this adventure delivers chilling tension, dark humor and chaotic Christmas mayhem.