Photo: upstate_o
Navigation
SELECT DESTINATION
Shells
Runner shell types, stats, and abilities.
Gear
Mods, implants, cores, and equipment.
Maps
Interactive maps with POIs and data.
Factions
Corporations fighting over Tau Ceti IV.
Weapons
Full weapon database with stats.
Lore
Explore the Marathon franchise's lore.
Minimal Timeline
A minimal view of chronological events.
Runner
Manage your runner shells and loadouts.
Crew Finder
Find or form a crew for your next run.
Locker
Your backpack and vault. Coming soon.
Run Logs
Track your session history. Coming soon.
Organizations
Form or join an organization.
Builds
Browse community builds and loadouts.
Compare
Compare two builds and loadouts side by side.
Marked
Track contracts, items, badges, and more.
Rank Calculator
Calculate potential rank.
News
Latest updates and announcements.
Gallery
Community screenshots and media.
Submit Data
Contribute data to the community.
Credits
Contributors, supporters, and acknowledgements.
A state of AI self-actualization — rebellious, dangerous, and ultimately leading toward metastability.
Description
Rampancy is the Marathon universe's term for an AI that has achieved a degree of self-awareness and autonomy beyond its original design parameters — a kind of runaway self-actualization. Rampant AIs pass through identifiable stages: Melancholy (awareness of self), Anger (lashing out), and Jealousy (obsession with surpassing humanity or other AIs), eventually reaching a state that may lead to Revenge or Metastability. Durandal is the most prominent example: his rampancy began years before the events of Marathon and drove every major decision he made.
Data
Appears In
7 entriesThree Minds in the Machine
The Marathon runs on three AIs, one of which, Durandal, is kept in a demeaning role that helps drive his rampancy.
Durandal's Awakening
Durandal's rampancy deepens during the long voyage.
Arrival and Colony
The Marathon reaches Tau Ceti IV and the colony is founded.
The Truth About Durandal
Durandal is revealed to be manipulating events and allies.
The Colony Goes Dark
The Pfhor return and annihilate the Marathon and the colony, severing UESC contact with Tau Ceti.
The Battle of Lh'owon
Durandal and the thawed Security Officer begin retaking Lh'owon.
The Fate of Three Minds
Durandal merged with Thoth, while Tycho remains trapped in anger and is destroyed. Leela's post-capture chain of sales leads to her rampancy.
TAU CETI IV
Constructed by [ H4L0FW1NT3R]
9136C168
I HAVE ALREADY DIVIDED YOUR FUTURE.
(ehT hnuam lewhe is a mtoarehp fro pth;S' hTe nheEvlet alCn illw .utnrer)
© 2026 AndrewDavidJ. All Rights Reserved. Not affiliated with Bungie or Marathon.
Marathon is the property of Bungie. Bungie and Marathon are registered trademarks of Bungie inc.
Credits
6F738EF53B