Check out the latest update for Marathon (v1.1.0.5, July 9, 2026)! Click here to view the patch notes. It is approx. 518 MB on Steam and contains a single fix to the solo queue.
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 (aka the latest Marathon Game).
  • At the bottom of this page are some of the latest lore videos created by our resonant lore experts, such as MyNameisByf. 
July 16, 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. Records marked ASSERT contain disputed continuity, projected dates, unresolved causes, or ONI interpretation rather than absolute fact.

S2 Nightfall Active
2893 Runner Era
TC-IV Restricted Zone
-- Lore Signals
Archive indexing...
Ancient Signals
c. 64M BCE Impact Event
Ancient Pathways Legacy

Yucatán Impact

An ancient alien entity crashes into Earth's Yucatán region. A vast, non-Mayan and non-Aztec pyramid later stands above the sleeping being, functioning as monument, access structure, and containment site.

// PATHWAYS CONTINUITY WITH MARATHON IS NOT ABSOLUTE.
c. 3189 BCE Alien Uprising
Ancient Pfhor Conflict

The Nakh Revolt

The enslaved Nakh revolt against the Pfhor. The empire suppresses the uprising with the trih xeem, an early record of the stellar weapon later used at Lh'owon.

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

After the S'pht'Mnr attack the S'pht'Kr, S'bhuth sends emissaries to the other clans and the S'pht'Kr begin their exodus from Lh'owon to the moon K'lia.

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 Legacy Signal // Continuity Unverified
c. 1930 Archaeological Rumor
Pathways Yucatán

The Pyramid Reports

Rumors circulate in archaeological communities about an ancient Yucatán pyramid that is neither Aztec nor Mayan. Its origin and purpose remain unexplained.

// LEGACY CROSSOVER RECORD; MARATHON CONTINUITY IS UNRESOLVED.
1938 German Expedition
Pathways Muller Expedition

The Pyramid Is Entered

A German expedition led by Muller reaches and enters the Yucatán pyramid while searching for an alien secret weapon.

// LEGACY CROSSOVER RECORD; MARATHON CONTINUITY IS UNRESOLVED.
1994 Containment Mission
Pathways Sergeant Eddings

The Sleeping God

An eight-person U.S. Special Forces team deploys to the Yucatán. After his primary parachute fails during the drop, Sergeant Eddings survives, reaches the pyramid alone, and attempts to arm a nuclear device before the entity awakens on May 13.

// LEGACY CROSSOVER RECORD; MARATHON CONTINUITY IS UNRESOLVED.
Human Expansion
2070 Earth-Net Signal
Colonial Rampancy

Rampancy Appears

Rampancy first appears on the Earth-net. The condition will later define Durandal, shape Tycho, and compromise every assumption that artificial intelligence remains property.

2194 Asteroid War
Colonial Icarus / Thermopylae

The Icarus-Thermopylae War

War erupts between the Independent Asteroid Government of Icarus and the Republic of Thermopylae on Onicis 492. Battleroids—dead soldiers reconstructed for combat—are deployed for the first time and kill almost everyone on both sides.

2206 AI Rampancy
Colonial Traxus IV

The Traxus Crash

Traxus IV becomes rampant and infiltrates five other AIs on the Martian Net. Mars shuts down its planetary network; the damage takes two years to root out and produces repercussions for more than a decade.

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 Munitions Record
Colonial Marathon Conspiracy

Weapons Hidden Aboard

Martians place munitions aboard the Marathon. Later records associate the wider infiltration of the project with MIDA sympathizers and saboteurs, although the conspiracy's full membership remains unclear.

// EVENT CONFIRMED; THE 2465 DATE CONFLICTS WITH DURANDAL'S SHIPBOARD COUNT.
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 & Colony Aftermath
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.

2795 Confirmed Loss
Aftermath Tau Ceti IV

Contact Is Confirmed Lost

UESC records confirm that contact with the Marathon colony has been lost. The finding is retained internally for years before the loss is publicly announced.

2804 Public Announcement
Aftermath Project Goliath

The Loss Is Publicly Announced

The UESC publicly announces the loss of communications with the Marathon colony. Project Goliath is commissioned to re-establish contact with Tau Ceti IV.

2811 Nova Crisis
Classic Lh'owon

Lh'owon and the Nova Crisis

Durandal and the Security Officer reach Lh'owon. The returning S'pht'Kr help liberate the surviving S'pht and defeat the local Pfhor forces. The Pfhor deploy the trih xeem against Lh'owon's sun, initiating the nova and the crisis explored in Marathon Infinity.

// INFINITY PRESERVES DIVERGENT TIMELINES AROUND THIS OUTCOME.
2812 Novel Contagion
Modern Retrospective Tau Ceti IV

The Novel Contagion

A novel contagion appears in Tau Ceti IV bio-research and food-production facilities, particularly algae ponds used for protein cultivation. It spreads through the colony, causing illness and death.

2827 Anomalous Event
Modern Retrospective The Anomaly

The Anomaly Event

On December 21, an anomalous event strikes Tau Ceti IV. Surviving visual records depict humans rupturing explosively through an unknown mechanism.

// CAUSE, INTENT, AND RESPONSIBLE ENTITY REMAIN UNRESOLVED.
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 Projected Arrival
Classic Estimate Leela

Projected Arrival of Leela's Warning

Leela estimates that the distress transmission sent during the 2794 attack will require ninety-two years to reach Sol. Legacy chronologies therefore project an arrival in 2886.

// PROJECTED ARRIVAL ONLY; EARTH'S RECEIPT IS NOT CONFIRMED.
2888 Confirmed Message
Modern Retrospective Durandal

A Message From the Marathon

Earth receives a message from the UESC Marathon attributed to Durandal: “Somewhere in the heavens, they are waiting.” Public interpretation divides between distress call, threat, and invitation.

Runner Era
2893 Restricted Zone
Runner Era Tau Ceti IV

Operations Begin at Tau Ceti

UESC reconnaissance satellites reach Tau Ceti, followed by UESC and independently contracted Runner operations. The colony remains under lockdown, and surface intelligence is assembled from incomplete surveys, recovered data, and faction-controlled reports.

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 Operational Archive
Season 2 Nightfall
Nightfall Tau Ceti IV

Darkness Descends

Profitable Runner raids attract increased UESC attention. Security forces escalate the lockdown while new mysteries emerge in Tau Ceti IV's dark regions and the Anomaly begins to change.

// “THE PLANET IS RESPONDING” IS ONI INTERPRETATION, NOT A CONFIRMED CAUSE.
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 protects Night Marsh resources with advanced encryption, restricts exfiltration access, and fortifies the upper rooms of Complex Control while anomalous energy flows from within.

// THE PURPOSE OF THE LOCKDOWN AND THE SOURCE OF THE ENERGY REMAIN UNCONFIRMED.
Season 2 Cradle System
Operational Update WEAVEworms

The Cradle Comes Online

The Cradle gives Runners direct control over six WEAVEworm colonies used to build and augment biocybernetic shells: Strength, Recharge, Dexterity, Endurance, Support, and Resistance.

Season 2 Sentinel Deployment
Operational Update Runner Shell

Sentinel Enters Deployment

Sentinel joins the Runner-shell roster as a defensive frame built to control space. Its Defender System intercepts grenades and missiles, Snare Mine immobilizes intruders, and Castle Doctrine improves resistance after splash damage.

LORE VIDEOS

  • The latest lore videos by content creators for Marathon. 
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END

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