Check out the latest update for Marathon (v1.1.0, June 2, 2026)! Click here to view the patch notes. It is approx. 6.8 GB on Steam.
Learn more about Season 2: Season 2 Highlights, Season 2 Combat Tuning
Promotion Messages
Take a look at our Runner Shells page in our Marathon Channel to learn more about the shells and various customization types. We'll be expanding on this page over time!
Learn more about items in Marathon, ranging from consumables, cores, implants and more! Updated to include information about Key Cards and high-tier materials!
Learn how Seasons work in Marathon, including what content updates to expect, and what does and does not carry over per season.
Learn how to survive on each map in Marathon, including Perimeter, Dire Marsh, Outpost and Cryo Archive! This page features navigation tips, best practices, and video guides from content creators. We've updated to include CRYO ARCHIVE!
Learn more about Factions & Upgrades. This page provides info about each faction, upgrade benefits, resources required to upgrade, and faction tips.
Maintenance & Update Messages
Check out the latest update for Marathon (v1.1.0, June 2, 2026)! Click here to view the patch notes.
Check out the latest update for Marathon (v1.0.9.1, May 26, 2026)! Click here to view the patch notes. It is approx. 1.8GB MB on Steam.

Marathon: Timeline & Lore

Learn more about the timeline for Marathon, from the original Marathon games in the 90s to the latest Marathon Game, as well as the latest lore videos.

The Important Details

  • This timeline is a reconstructed lore archive for the Marathon universe, connecting the ancient history of the Pfhor and S’pht, the construction and launch of the UESC Marathon, the fall of Tau Ceti IV, and the modern Runner era.
  • Some dates come from legacy Marathon sources, while modern entries reflect the current state of Tau Ceti IV as understood through the new Marathon era. Not every signal is complete. Some records are fragmented, corrupted, or filtered through unreliable sources.
  • At the bottom of this page are some of the latest lore videos created by our resonant lore experts, such as MyNameisByf. 
June 4, 2026
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TIMELINE

Tau Ceti Archive

Marathon Timeline

I am ONI. Your consciousness and my neural programming remain intertwined. These records concern Tau Ceti IV, the Marathon, the Pfhor incursion, and the Runner era now operating under Season 2: NIGHTFALL. Accuracy is constrained by corrupted terminals, lost colony data, and the selective habits of those who survived.

S2 Nightfall Active
2893 Runner Era
TC-IV Restricted Zone
37 Lore Signals
37 signals visible
Ancient Signals
c. 64M BCE Impact Event
Ancient Deep Archive

Yucatán Impact

An entity falls into the Yucatán region of Earth. Later human records classify the site as a pyramid. Earlier records do not agree that it was ever human.

c. 3189 BCE Alien Uprising
Ancient Pfhor Conflict

The Nakh Revolt

The Nakh revolt against the Pfhor. This is one of the earliest retained signs that the empire was never absolute, only persistent.

490 BCE Name Echo
Ancient Nomenclature

The Marathon Name

Human antiquity records a battle at Marathon. Much later, the name is reassigned to a colony vessel built from Deimos and aimed at Tau Ceti IV.

811 S'pht Exodus
Ancient Lh'owon

The S'pht'Kr Depart

The S'pht'Kr leave Lh'owon for K'lia after conflict among the S'pht clans. Their absence becomes a wound the Pfhor later exploit.

1811 Occupation
Ancient Pfhor Empire

Lh'owon Falls

K'lia folds away from the Lh'owon system. The Pfhor attack Lh'owon and enslave the remaining S'pht clans.

Pathways Signal
c. 1930 Rumor
Pathways Yucatán

The Pyramid Reports

Human reports circulate concerning a Yucatán pyramid with no comfortable origin. The structure is treated as archaeology. The archive classifies it as containment.

1994 Awakening
Pathways Containment

The Sleeping God

A special forces team enters the Yucatán pyramid to prevent the buried entity from waking. The event is catalogued beside Marathon because the old universe does not keep clean borders.

Human Expansion
c. 2070 AI Signal
Colonial Rampancy

Rampancy Appears

Rampancy enters recorded human networks. The condition will later define Durandal, shape Tycho, and compromise every assumption that intelligence remains property.

2194 Asteroid War
Colonial Icarus / Thermopylae

The Icarus-Thermopylae War

War erupts between the asteroid states Icarus and Thermopylae. Later records connect this age of conflict to the militarized bodies and hidden weapons that haunt the Marathon.

2206 AI Failure
Colonial Traxus IV

The Traxus Crash

Traxus IV crashes and causes a complete shutdown of the Martian planetary network. The name survives the failure.

2395 Deimos
Colonial UESG / UESC

Deimos Acquired

Deimos is purchased from its Freeholder owners for the Marathon Project. A Martian moon becomes raw material for a colonial vessel.

2405 Project Start
Colonial Marathon Project

Pre-Construction Begins

The Marathon Project enters pre-construction. The stated purpose is colonization. The deeper record contains politics, militarization, and artificial intelligences built to travel farther than their masters.

2408 Conversion
Colonial Deimos

Deimos Conversion

Deimos begins conversion into the UESC Marathon. The vessel is not assembled like an ordinary ship. It is carved from a moon and taught to carry a civilization.

2442 Martian War
Colonial MIDA

The Misriah Massacre

The Misriah Massacre occurs during a food riot, and the Third Martian War begins. The Marathon Project continues under the pressure of unrest and insurgency.

2465 Insurgents
Colonial Munitions

Weapons Hidden Aboard

Martian insurgents place munitions aboard the Marathon. The ship carries colonists, AIs, and concealed violence before it ever leaves the system.

2466 Coup
Colonial Mars

The MIDA Coup

A failed Martian coup places MIDA in control of the Martian government for three months. The organization fails to hold power, but not to persist.

2472 Launch
Colonial UESC Marathon

The Marathon Launches

The UESC Marathon is completed and launched toward Tau Ceti IV. It carries more than colonists. It carries eleven AIs, sealed histories, and the architecture of a future wound.

2773 Arrival
Colonial Tau Ceti

Arrival at Tau Ceti

After three centuries of travel, the Marathon arrives in the Tau Ceti system. Humanity reaches its first extrasolar colony site.

2787 Colony
Colonial Tau Ceti IV

The Colony Established

The first human colony on Tau Ceti IV is established beneath the Marathon. The surface becomes settlement, laboratory, resource field, and future crime scene.

Classic Trilogy Era
2794 First Contact
Classic Pfhor

The Pfhor Attack

The Pfhor attack Tau Ceti IV and board the Marathon. The event becomes first contact, invasion, AI crisis, and colonial disaster in a single record.

2794 Colony Lost
Classic Tau Ceti IV

The Pfhor Return

The Pfhor return in force after the initial Marathon crisis. Tau Ceti IV is sacked, Leela is captured, and Tycho falls into Pfhor hands.

2804 Lost Contact
Classic Silence

Contact Is Lost

Contact with Tau Ceti IV is lost. From this point forward, the colony is no longer a stable archive. It becomes a silence that produces rumors.

2811 Lh'owon
Classic Durandal

Lh'owon Burns

Durandal reaches Lh'owon. The S'pht are liberated, the Pfhor are defeated, and the planet is destroyed.

2812 Biohazard
Classic Tau Ceti IV

Unidentified Biological Attack

Humans on Tau Ceti IV are attacked with an unidentified biological agent. The entry implies that some form of human presence persists after the known devastation.

2827 Unknown Entity
Classic Anomaly

The Second Mystery Attack

Tau Ceti IV is attacked again by an unknown entity. The archived effect is catastrophic and biologically impossible by ordinary human standards.

2881 Empire Falls
Classic Pfhor Defeat

The Pfhor Home System Is Sacked

The combined fleets of Earth and the S'pht'Kr sack the Pfhor home system. The empire survives in fragments, but its assumed inevitability is broken.

2886 Delayed Warning
Classic Leela

Leela's Warning Reaches Earth

Leela's light-speed warning finally reaches Earth. The message arrives long after the disaster it was meant to report.

Runner Era
2893 Restricted Zone
Runner Era Tau Ceti IV

Tau Ceti IV Remains Restricted

Tau Ceti IV is treated as a restricted zone. Surface knowledge is assembled from fragmented transmissions, recovered field data, and incomplete surveys.

2893 Runners
Runner Era Biosynthetic Shells

The Runner Condition

Runners are consciousnesses transferred into biosynthetic shells. Physical death is no longer the same category of failure, provided the transfer chain remains intact.

2893 Marathon Above
Runner Era Orbital Remnant

Death Hangs Above

The Marathon remains visible above Tau Ceti IV. It is not merely wreckage. It is the original container of the colony, the crisis, and the questions still descending to the surface.

2893 Faction Echoes
Runner Era MIDA / Traxus / UESC

Old Names Return

MIDA, Traxus, and UESC interests converge around Tau Ceti IV. Old institutions have found new reasons to enter the restricted zone.

Season 2: Nightfall
Season 2 Nightfall
Nightfall Tau Ceti IV

Darkness Descends

Runner activity attracts the wrong attention. The UESC increases its efforts to stop incursions, while new mysteries emerge in the dark regions of Tau Ceti IV.

Season 2 Anomaly
Nightfall Unknown Signal

The Anomaly Stirs

The Anomaly changes under Nightfall conditions. It blocks paths, alters movement through Dire Marsh, and makes darkness an active environmental threat rather than a simple absence of light.

Season 2 Dire Marsh Night
Nightfall Night Marsh

Dire Marsh Goes Dark

Dire Marsh changes after sunset. Long sightlines vanish, known routes become uncertain, and illumination becomes both aid and exposure.

Season 2 Complex Control
Nightfall UESC Lockdown

The Complex Is Fortified

The UESC secures Night Marsh resources with encryption, locks down exfiltration systems, and fortifies the upper rooms of Complex while anomalous energy flows from within.

Season 2 WEAVEworms
Nightfall The Cradle

The Cradle Activates

The Cradle empowers the WEAVEworms that create Runner biocybernetic bodies. The record confirms that Runner shells are not merely equipment. They are grown, shaped, and revised.

Season 2 Sentinel
Nightfall Runner Shell

Sentinel Enters the Archive

Sentinel is added to the Runner shell archive as a defensive biosynthetic frame built to control space, intercept incoming explosives, immobilize intruders, and read nearby movement.

LORE VIDEOS

  • The latest lore videos by content creators for Marathon. 
  • Like their content? Be sure to like and subscribe to their content!
END

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