Spooky DnD One-Shot Adventure

Adventure one-shot ideas for horror or Halloween. Assumed to take course over the an evening or night. Probably with a full moon.


The characters are working for the local ruler hunting a criminal. A character is haunted by a harmless ghost.
It is at a hilltop watchtower which has strong ties to the Nine Hells.
There are local nobles and merchants gathered for a masquerade ball. And a desperate assassin seeks to kill a hag by dawn.
At some point it starts or stops raining.
As the adventure progresses signs of an apocalypse manifest

The characters are a group of inventors gathered for a special challenge. A character is being hunted by a monster.
It is at an abandoned palace which was the site of several murders.
There are kuo-toa worshipping many-eyed creatures. And a desperate thug seeks to kill a hag by dawn.
At some point there is a loud knocking on a door.
As the adventure progresses a portal slowly starts to open

The characters are a group of monster hunters chasing a shapechanger. A character is being hunted by a monster.
It is at an underground vault which gives nightmares to any who try to sleep there.
There are a gang of wererats looking for buried treasure. And the spirit of a necromancer is trying to escape from a crystal ball.
At some point someone goes missing.
As the adventure progresses there is a series of murders

The characters are a group of inventors gathered for a special challenge. One or more characters have cursed magic items.
It is at an ancient theater which was the site of several murders.
There are a family of doppelgangers who have recently moved in. And a shadow dragon wants help entering from the Shadowfell.
At some point someone finds a mysterious riddle.
As the adventure progresses people start dying in different ways

The characters are monsters looking for somewhere to hide for the night. A character is accompanied by an annoying friend.
It is at a night market which is home to many spiders.
There are a mismatched group of awakened animals choosing a leader. And an imp seeks suitable servants for its patron.
At some point someone discovers a hidden coffin.
As the adventure progresses there is a series of murders