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Mothership: Gradient Descent


64 pages. Full color interior.
Written by Luke Gearing
Illustrated by Nick Tofani
Edited by Jarrett Crader
Layout by Sean McCoy 

For Mothership 1E

Gradient Descent is a sci-fi horror megadungeon set in an abandoned android factory controlled by a powerful rogue AI known as "MONARCH." Built from the ground up for the ENnie Award Winning Mothership RPG.

Written by Luke Gearing (Fever Swamp, Acid Death Fantasy) and illustrated by RPG newcomer, Nick Tofani, it includes:

  • The CLOUDBANK Synthetics Production Facility, AKA "The Deep," a 12 level, 200+ room megadungeon. Clean layout with an eye towards usability at the table, the Deep is one of the easiest to reference and run megadungeons on the market.
  • The Bell, a small scavenged camp orbitting the Deep, where your players can rest and recuperate from adventuring. Contains a small crew of NPCs with their own unique rumors and agendas. 
  • A d100 table of powerful Artifacts created by Monarch, each with their own unique effects and potential hazards.
  • Campaign ready! A section on Fallout gives guidance on the potential short and long term consequences your players may face as a result of their actions in The Deep.
  • One shot accessible: Quick tips and tables make it easy to run a 1-3 hour "dive" into The Deep for a single night's play.
  • Supports different playstyles: Everything in the Deep wants something and can be reckoned or bartered or negotiated with. Great for Faction play, social roleplayers, or players who just want a difficult series of combat encounters.
  • A unique new condition called "The Bends" that will have your players questioning whether they are human.
  • Coming soon: Player aid handout maps for download. Players can fill in the maps with information they learn as they explore. 

This adventure is suitable for characters of any level in a survival horror setting and is sure to pose a challenge to even the most battle hardened party. You can even find the core rules for Mothership here for Pay What You Want.

Content Warning // Contains: Scenes of graphic violence, body horror, emotional trauma, psychological distress, obscene language, and harm to android children.


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Discussions (2)
Customer avatar
Marc M June 12, 2024 7:47 pm UTC
I backed 1e via backerkit quite a while ago. Just two months ago I bought Gradient Descent for 0e here, expecting there would be an updated PDF. It seems, I was wrong.

Is there any chance to get the update without having to purchase the full product again?
Customer avatar
Sean M June 15, 2024 12:05 am UTC
Hey Marc! Reach out to our customer support at and we’ll try and help!
Customer avatar
Marc M June 29, 2024 8:45 pm UTC
The support did not respond yet
Customer avatar
Benjamin B June 11, 2024 10:48 pm UTC
The fact that this update to the 1st edition rules is being sold as a seperate title, rather than just being an update to the 0e verions of the product has made me question whether or not I want to support Tuesday Knight Games...and for now the answer is a resounding "NO!" I urge everyone not to support such predatory sales practices until such time as Tuesday Knight Games is forced to rethink this abominably bad decision and provide a free update to this product for all those who purchased the 0e version.
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File Last Updated:
June 11, 2024
This title was added to our catalog on June 11, 2024.