The Nightfall Refresh is here! Check out the latest update for Marathon (v1.1.9.2)! Click here to view the patch notes.
Bungie reveals that Destiny will continue, and talks more about the evolution of Marathon by the end of Year 1. Read more here!
We've refreshed most pages in our Marathon channel with the latest information to support the launch of the Nightfall Refresh October 6.
Promotion Messages
Learn more about what the Season 2 mid-season update will bring. Click here to view the post.
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 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 (v1.1.0.5, 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.

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. 
September 30, 2026
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START HERE, RUNNER

TIMELINE

Tau Ceti Archive

Marathon Timeline

I am ONI. Your consciousness and my neural programming remain intertwined. This archive concerns Tau Ceti IV, the UESC Marathon, the Pfhor, the S'pht, the Anomaly, and the Runner operations now cutting through what remains. Archive integrity is imperfect. Legacy records conflict with recovered modern data; some outcomes survive only as projections, divergent timelines, or retrospective claims. Records marked ASSERT identify disputed continuity, unresolved causes, projected outcomes, or my own analytical reconstruction. I do not confuse confidence with proof.

NF Nightfall Record
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.

2095 Corporate Origin
Colonial Traxus

Traxus Intelligent Machines Is Founded

Traxus Intelligent Machines begins operations around a singular proposition: artificial intelligence should be built to penetrate problems human cognition cannot. The first true AI is attributed to this era of Traxus development.

2152 Cybernetic Industry
Colonial Sekiguchi

Sekiguchi Electronics Is Founded

Hideo Murakami founds Sekiguchi Electronics around superconductivity and quantum computing. By 2158, the company manufactures its first artificial brain implant module.

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.

2198 WEAVEworm Precursor
Colonial EARTHworm

The Worm Line Begins

Sekiguchi develops EARTHworm to accelerate the processing of refuse. The technology becomes the first documented branch in a lineage that will eventually produce SILKworms, WEAVEworms, and the systems used to print and augment Runner shells.

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.

2459 Full-Body Prosthetics
Colonial Sekiguchi

The Body Becomes Replaceable

Sekiguchi begins manufacturing full-body prosthetics that combine advanced artificial tissue with high-technology components. The separation between human continuity and biological form narrows again.

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.

Legacy Conflict & 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 Project Goliath

Contact Is Confirmed Lost

UESC records confirm that communications with New Cascadia and the Marathon have failed. Project Goliath planning begins that same year, initially framed as a mission to restore contact, determine the cause of the blackout, and re-establish UESC control if required.

2797 Project Goliath
Aftermath UESC Equanimity

Equanimity Departs for Tau Ceti

The UESC Equanimity departs under Project Goliath with personnel, security assets, and communication relays intended to restore contact with New Cascadia and investigate the silence surrounding the Marathon.

2804 Public Announcement
Aftermath Disclosure

The Loss Is Publicly Announced

The UESC publicly acknowledges the loss of communications with the Marathon colony. By this point, Project Goliath has already existed for years; 2804 is the date of disclosure, not the beginning of the response.

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 New Cascadia

The Novel Contagion

Recovered colony records dated to 2812 document a novel contagion affecting New Cascadia. Fungal growths appear in bio-research and food-production systems, including algae ponds used for protein cultivation, before the outbreak spreads into the population.

// THE CONTAGION'S ORIGIN AND ITS RELATIONSHIP TO THE ANOMALY REMAIN UNRESOLVED.
2827 Anomalous Event
Modern Retrospective The Anomaly

The Anomaly Event

On December 21, surviving visual records show a New Cascadian entering an anomalous phenomenon and undergoing catastrophic physical transformation. Additional colony records describe hallucinations, temporal irregularities, and unexplained behavior around the same phenomenon.

// CAUSE, INTENT, OR INTELLIGENCE BEHIND THE ANOMALY HAS NOT BEEN PROVEN.
2881 Legacy Epilogue
Classic Record Pfhor Defeat

The Pfhor Home System Is Sacked

Marathon 2's legacy epilogue places the sacking of the Pfhor home system by combined Earth and S'pht'Kr fleets in 2881. The record establishes the eventual collapse of Pfhor imperial dominance within that chronology.

// LEGACY EPILOGUE RECORD. MODERN 2893 CONTINUITY HAS NOT YET RECONCILED EVERY CONSEQUENCE OF THIS OUTCOME.
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 Project Goliath Arrival
Runner Era Tau Ceti IV

Operations Begin at Tau Ceti

Project Goliath reaches Tau Ceti. UESC reconnaissance assets, security forces, aligned Runners, and independently contracted Runners begin operating across the abandoned colony while six Earth-based factions compete for access to its data, technology, and resources.

2893 Runners
Runner Era Bio-Cybernetic Shells

The Runner Condition

Runners are bio-cybernetic mercenaries whose consciousnesses can be re-uploaded into replacement shells after physical death. The body is therefore an operational platform; continuity of the mind is the asset that must be preserved.

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 Cryo Archive
Runner Era UESC Marathon

The Marathon Is Re-Entered

After failed UESC boarding attempts encounter jump-scramble interference, Cryo Archive becomes a viable path back into the Marathon. UESC forces establish a foothold; Runners later penetrate the ship's Vault network, recover AI Subroutines, and confront Subject01.

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.

Nightfall Operational Archive
NIGHTFALL Operational Era
Nightfall Tau Ceti IV

Darkness Descends

Profitable Runner raids attract increased UESC attention. Security forces intensify the lockdown while the Anomaly changes and previously familiar regions become more dangerous after sunset.

// A CAUSAL LINK BETWEEN RUNNER ACTIVITY AND THE ANOMALY'S CHANGE HAS NOT BEEN ESTABLISHED.
NIGHTFALL Anomaly Shift
Nightfall Unknown Signal

The Anomaly Stirs

Nightfall conditions reveal new behavior around the Anomaly. It obstructs routes through Dire Marsh, reshapes how Runners navigate familiar terrain, and turns darkness into an operational hazard rather than a simple lack of visibility.

NIGHTFALL Night Marsh
Nightfall Dire Marsh

Dire Marsh Goes Dark

After sunset, long sightlines disappear, illumination becomes both tool and exposure, and familiar ground must be interpreted through incomplete information. UESC activity remains high while the upper Complex becomes a focal point of investigation.

NIGHTFALL Complex Control
Nightfall UESC Lockdown

The Complex Is Fortified

The UESC secures Night Marsh resources behind encrypted access systems. Runners recover UESC Certs from security forces, compromise Network Towers, reactivate locked exfils, and force access to the upper levels of Complex Control while anomalous energy flows from within.

// THE SOURCE OF THE ANOMALOUS ENERGY AND THE FULL PURPOSE OF THE UESC LOCKDOWN REMAIN UNCONFIRMED.
NIGHTFALL Cradle System
Operational Update WEAVEworms

The Cradle Comes Online

The Cradle gives Runners direct control over six WEAVEworm attribute tracks used to strengthen biocybernetic shells: Strength, Recharge, Dexterity, Endurance, Support, and Resistance.

NIGHTFALL Shell Deployment
Operational Update Sentinel

Sentinel Enters Deployment

Sentinel joins the Runner-shell roster as a defensive strategist. Its Defender System neutralizes incoming explosives while improving nearby weapon stability and reload speed; Snare Mine deploys immobilizing submunitions; Prey Tracker reveals moving hostiles; Castle Doctrine rewards close-range defensive pressure.

Forecast Signals // Not Yet Historical Record
REFRESH Near-Term Forecast
Forecast Nightfall Refresh

Operational Baseline Will Be Reset

Runner progression and the contracted in-game economy are scheduled for a synchronized reset. Reward channels will be recalibrated, live systems retuned, and Vault Breaker will return for a limited observation window.

// FUTURE OPERATIONAL PLAN. CONTENT MAY CHANGE BEFORE DEPLOYMENT.
SYMBIOSIS Projected Expansion
Forecast Perimeter / Bishop

Symbiosis Approaches

Projected operations include a permanent PvE environment, a CyAc-sponsored staging space under ONI observation, an expanded Perimeter transformed by a spreading fungal ecosystem, experimental direct-combat exercises, and deployment of the Bishop hunter-killer shell.

// FUTURE OPERATIONAL PLAN. FINAL CONDITIONS ARE NOT YET HISTORICAL FACT.
MARCH Long-Range Forecast
Forecast Alien Escalation

The Pfhor Return to the Active File

Long-range planning points toward deeper narrative operations, a refactored Cradle, a new zone, and additional alien combatants. Pfhor contact is specifically anticipated, although the forms encountered may differ from historical records.

// DEVELOPMENT FORECAST. SPECIFIC ENCOUNTERS, CAUSES, AND CONTINUITY LINKS REMAIN UNRESOLVED.

LORE VIDEOS

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

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