The Cogheart Conundrum: A Level 10 Steampunk One-Shot for D&D 5e
Publisher: Dungeon Masters Guild
A Steampunk D&D 5e One-Shot Adventure (Level 10)
The Cogheart Conundrum is a fully playtested Level 10 Dungeons & Dragons 5e one-shot adventure, built for Game Masters who want a dramatic session without hours of preparation.
"The gears of Pyrestone are grinding to a halt. Once a shining beacon of industrial brilliance, the city is now under siege by its own creations, rogue constructs wreaking havoc and spreading fear. The chaos leads to Sprocket’s Steamworks, where a daring inventor’s greatest achievement has gone horribly wrong."
At the centre of the factory waits a towering mechanical horror known only as Big Clank Daddy.
If the party cannot stop it, Pyrestone may soon fall beneath an unstoppable Age of Steel.
Perfect for a single session or as the explosive start to a longer steampunk campaign.
Bonus Player Content
This adventure also includes two original subclasses, designed to fit perfectly into steampunk and industrial fantasy settings.
- Barbarian - Path of the Overcharged: Harness unstable energy cores to fuel devastating bursts of rage. Become a walking engine of destruction, but push too far and the power may overload.
- Rogue - Saboteur: Experts in gadgets, traps, and explosive disruption. Saboteurs thrive on chaos, dismantling enemies and machinery with clever devices and perfectly timed sabotage.
What’s Included
This adventure provides everything you need to run the game straight away:
- Complete Level 10 one-shot adventure for D&D 5e
- Designed for 3.5 to 4 hours of play
- Balanced encounters for 2–6 players
- 12 original steampunk monster stat blocks, including a clockwork dragon, the infamous Big Clank Daddy
- 3 detailed battle maps
Perfect For Game Masters Who Want
- A memorable steampunk adventure
- A dramatic boss encounter your players will never forget
- Clear layout and easy-to-run encounters
- Rich worldbuilding with industrial intrigue
- A one-shot you can realistically run tonight
Digital Download
This product is delivered as a PDF digital download.
Instant download after purchase
Compatible with printing, tablets, and virtual tabletops
Includes maps suitable for tabletop or VTT use
No physical product will be shipped
This work includes material taken from the System Reference Document 5.1 (“SRD 5.1”) by Wizards of the Coast LLC and available at https://dnd.wizards.com/resources/systems-reference-document. The SRD 5.1 is licensed under the Creative Commons Attribution 4.0 International License available at https://
Price: $10.68