Across the Open Threshold

You have stepped beyond the threshold: hurtled through the dark beyond and plunged into the abyssal unknown. This place, Terminus, trapped at the end of time, is the last thing before the infinite cosmic beyond.

Into Terminus the Unthinkable have seeped. Like mold in the walls of reality, they infest the very fabric of its labyrinthine halls. They are not to be seen by mortal eyes, but you have stepped beyond the threshold.

They want to be seen.

Across the Open Threshold is a system-neutral fantasy dungeon delve for high-level characters. Venture into the mindbending realm of Terminus and uncover the secrets of the Unthinkable Beyond. However, Terminus is a living place that seeks to trap and ensnare all who dare enter. Will you survive the maddenning realm, or will you be reduced to a broken husk at the end of time?

• A 65-room, labyrinthine dungeon, suitable for fantasy TTRPG campaigns and designed to fit into any setting.
• Designed primarily for OSR systems.
• Over 20 new monsters and magic items
• Includes an additional digital file of statistics for creatures and magic items for running the adventure in D&D 5e (suitable for 2014 or 2024 rulesets).

Content Warnings: Arthropods (spiders, termites, ticks), body horror, cannibalism, cosmic horror, eldritch horror, existential dread, graphic violence, Ttalassophobia

Physical copies available on Drive Thru RPG

"Across the Open Threshold is both ridiculous and terrifying. It's my favourite adventure I've run this year."
— Brandon Yarrow 

 "The monster in the pool gave one of my players nightmares. We had a great time!"
— Raven Burke