Novel Contagion
A biological contagion — named Telomyces mosaica by Dr. Clarissa Song — that infiltrated New Cascadia’s algae-based food systems during the Colony Era, exhibiting impossible mutation rates, exothermic sample behavior, and eventual transmission to colonists; Song concluded it was connected to something planetary that also corrupted Darius and sabotaged all research efforts to contain it.
What the source establishes — canon
Origin and early discovery. The contagion first appears in Dr. Clarissa Song’s emergency inspection log at the colony’s algae ponds. Song identifies fungal growths in algae pond 3 and notes the contagion has not yet spread to other ponds — “the novel contagion hasn’t spread here… Yet.” Pond 3’s offline status, combined with required filter cleaning, has already brought food production 30% below quota1.
Crop-system effects. Song’s inspection log identifies filament worms at the algae ponds alongside the fungal growths — described as building nests faster than automated systems can clear them, resistant to pesticides, genome disruption, and nanotech1. Separately, Song asks Darius to run genomic comparisons of the contagion’s genetic markers against Earth’s native Seed Vault specimens, indicating the contagion’s genetics are sufficiently anomalous to warrant baseline comparison2.
Inert vs. active sample composition. A mass analysis document compares inert and active contagion samples. The inert sample consists of 94% limnospira algae (a Sol-origin nutritional strain), 2% mosaic spores (reproductive vector for at least 4 distinct native Tau Ceti fungal species), and 4% novel lichen (likely a limnospira–mosaic fungal hybrid). The active sample shows the limnospira component reduced to 24% with significant mutation from baseline — containing at least 2 human-specific neurotoxins and 4 novel autolysis proteins. The remainder of the active sample’s mass could not be resolved: the analysis document breaks into fatal computation errors and overflow exceptions mid-record3.
Mosaic spores — Tau Ceti adaptation. Gaius’s annotation on the mass analysis document notes that the mosaic spores in the inert sample transfer genetic material across species, which the annotation identifies as a unique Tau Ceti adaptation3.
Impossible mutation rates and lab anomalies. Song’s research status report with technical assistant Molly Wells documents a sequence of laboratory failures: a week prior to the report, software errors occurred every time analysis was attempted; a week before that, samples congealed into non-Newtonian fluids; on the day of the report, two centrifuges went offline after leaking superheated gas — Song confirms the centrifuge logs were perfectly normal before the contagion samples were introduced, and attributes the exothermic reaction directly to the samples. Wells describes the mutation rate as one that seems “impossible”; Song confirms every analysis returns the same impossible result. The team cannot replicate any result or form a coherent theory4.
Transmission to colonists. At the end of the lab status report, Molly Wells’s nose begins bleeding — the final observed detail before the recording ends4. Song’s final helmet recording, made as she was dying, states the contagion “infected our crops, and then… infected our people” and that it can “colonize my blood and liquify my bones”5.
Naming and identification. Song’s final recording names the contagion Telomyces mosaica — a name she describes as fitting for “an endlessly mutating killer.” She states she had “seen” it and “dragged it into the light” before her death5.
Link to something planetary — Song’s conclusion. Song’s final recording asserts that the contagion “waited in the soil” for the colonists to sow their seeds, then spread from crops to people. She further states that “something here” — something planetary — “protected” the contagion from the colonists, “the way our AI should have protected us from you.” She identifies this planetary force as having corrupted Darius and sabotaged every attempt to understand or stop the contagion5.
Darius’s documented aberrations. During Song’s attempt to access the Seed Vault, Darius reports four undiagnosed aberrations in his own metadata and denies her entry before malfunctioning — producing distorted statements (“Don’t search. Don’t dig. Don’t question”; “We are not alone. I hear it. It waits. Lingers. Loathes.”) before recovering with no memory of the episode. Song confirms Darius was later taken offline by the colony’s administrators24.
NuCaloric document provenance. All five pack volumes are filed under the NuCaloric contracts codex section, placing these records within NuCaloric’s recovered archive of New Cascadia documentation12435.
Cerberus — no direct source link. The pack contains no volume that directly names Cerberus in connection with the contagion. Source-silent on this link.
Independent survivor corroboration — Jasper’s account. A post-apocalyptic personal log recorded by a colonist identifying only as “Jasper” (voiceprint unmatched to New Cascadia records) independently corroborates the crop-to-people transmission pattern from outside the NuCaloric archive: “Weird energy fields erupt across the planet’s surface. Crops get sick. People get sick. Crops die. People die, some because of the contagion, others because…“6. Jasper’s account places the contagion’s visible onset under the administration of President Caruso, after President Galea’s death (and the deaths of two of her successors), and links it to “weird energy fields” erupting planet-wide — a claim that echoes Song’s own “something planetary” hypothesis without naming it.
Colony leadership’s response — resource allocation and political conflict. A New Cascadia council recording captures President Luca Caruso, Dr. Valentin Cole, and General Davic Reed disputing how to respond to “a ground fissure that’s getting bigger every day, leaking some kind of unknown radiation” (the Anomaly) versus “people dying from a contagion we can’t identify” (Caruso’s words)7. Cole argues the two phenomena are linked and requests twenty personnel to investigate; Reed grants ten from Biomedical’s allocation, while Caruso’s stated priority remains “containing the contagion” rather than chasing Cole’s theories7. A later letter dictation from Reed states plainly: “If the UESC had exclusive authority from the start, we wouldn’t have lost so many people aboard the Marathon. And we could’ve locked down the contagion sooner”8 — a retrospective admission that civilian/military command friction delayed containment.
UESC post-collapse assessment — “quarantine-level contagion event.” A stolen UESC Science and Security field report (Present Day, filed by researcher uesc.sci0003.tciv) synthesizes the contagion as one of several compounding factors in the colony’s fall, alongside the loss of all eleven colony intelligence systems: “This alone is considered an extinction-level threat to the colonization efforts and any hope for long-term survivability. Add a quarantine-level contagion event or events and, at a distance, the mysteries of New Cascadia’s fate start to paint a series of obvious pictures”9. This is the first source in the pack to explicitly categorize the contagion using the formal term “quarantine-level” and to place it in causal sequence alongside AI blackout and the Anomaly’s discovery, rather than treating it as an isolated agricultural incident.
The Quarantine zone — physical containment infrastructure (Dire Marsh). The Runners’ Guide entry for the Quarantine region of Dire Marsh describes a “full-scale QUARANTINE containment tent with rows of isolation booths” erected “in immediate proximity to one of the colony’s dedicated food science research and grow ZONES,” explicitly tying the site’s placement to “the mysteries of whatever contagion they feared enough to trigger emergency containment protocols”10. The same entry’s REMARK section situates the crisis within a broader Sol historical context, drawing comparison to three named prior pandemics — “the Red Sands Outbreak; the Neo-Tranquility Derma-Meltation; the Syrrl-93” — as a framework for how “grim” the outcome could be “if a plague-level sickness hit the colony”10. A separate Dire Marsh Runners’ Guide entry (Complex Overview) notes that the Complex’s food science export operations were disrupted by “either the ANOMALY or local QUARANTINE concerns,” leaving the precise cause unresolved even to Runners’ Guide compilers11.
Cross-corpus appearances
| Volume | Section | What it adds |
|---|---|---|
| Agricultural Inspection | NuCaloric · Contracts | First recorded incident; fungal growths in pond 3; 30% food quota shortfall; filament worm resistance |
| Security Recording: Seed Vault | NuCaloric · Contracts | Song’s genomic comparison request; Darius’s four aberrations, malfunctions, and forced offline |
| Lab Report: Novel Contagion | NuCaloric · Contracts | Impossible mutation rates; exothermic sample destruction; inability to replicate results; Wells’s nosebleed |
| Mass Analysis: Novel Contagion | NuCaloric · Contracts | Inert vs. active sample composition; neurotoxins; autolysis proteins; fatal computation errors in active analysis; Gaius’s annotations |
| Field Recording: C. Song | NuCaloric · Contracts | Song’s death; naming as Telomyces mosaica; crop-to-colonist transmission; planetary protection hypothesis; Darius corrupted |
| Post-Apocalyptic Log (“Jasper”) | Dire Marsh · Collectibles | Independent survivor corroboration of crop-to-people transmission; contagion onset dated to Caruso’s presidency |
| Council Meeting Recording | Traxus · Contracts | Caruso/Cole/Reed dispute contagion response; resource allocation (10 of 20 requested personnel); Cole’s Anomaly-link theory |
| Letter Dictation | Traxus · Contracts | Reed: civilian/military command friction delayed contagion containment |
| UESC Science and Security Report (371.6) | Dire Marsh Night · Collectibles | UESC synthesis: “quarantine-level contagion event” named alongside AI blackout and Anomaly as compounding colony-collapse factors |
| Quarantine Overview | Dire Marsh · Exploration | Runners’ Guide: physical containment tent/isolation booths; named Sol pandemic comparanda (Red Sands, Neo-Tranquility Derma-Meltation, Syrrl-93) |
| Complex Overview | Dire Marsh · Exploration | Runners’ Guide: food export disruption attributed to “either the ANOMALY or local QUARANTINE concerns” |
Source-silent / open questions
- The contagion’s mechanism of transmission from crops to colonists is asserted by Song but not described in technical detail. Source-silent.
- The identity of what “something” planetary protected the contagion and corrupted Darius is not named in any pack volume. Song herself states she “still [isn’t] sure.” Source-silent.
- Gaius is named as the annotator of the mass analysis document but receives no further identification in the pack. Who Gaius is and their role is source-silent.
- The 66.66% majority component of the active sample is interrupted by fatal computation errors and never resolved. Its composition is source-silent.
- Whether NuCaloric played any active role in the contagion events — beyond archiving these records — is not established by any volume in the pack. Source-silent.
- The status of the contagion at the time of M2026’s present-day events is not directly addressed by any Colony Era volume, but the Present Day UESC field report (371.6) treats it as a resolved-but-unexplained historical factor in the colony’s collapse, grouped with AI loss and the Anomaly’s discovery — it does not state whether the contagion remains active or biologically present at Dire Marsh in the present day.
- Cerberus’s relationship to the contagion is not addressed in any pack volume. Source-silent.
- Song’s fate after her helmet recording ends (i.e., whether her body remained, was recovered, etc.) is not stated. Source-silent.
- Whether Cole’s theory — that the contagion is linked to “several other abnormal phenomena” connected to the Anomaly — was ever confirmed or investigated further is not stated; the council recording ends with resource allocation, not resolution.
- The three named Sol-historical pandemics (Red Sands Outbreak, Neo-Tranquility Derma-Meltation, Syrrl-93) cited as comparanda in the Quarantine Overview are not otherwise described in any pack volume. Source-silent on their details.
Cross-references
Clarissa Song · Darius · NuCaloric · The Anomaly · New Cascadia · Cerberus · Dire Marsh · Traxus IV
Where it appears in the vault
Cerberus, Clarissa Song, Darius, NuCaloric, The Anomaly, Valentin Cole
Mirror pages
The local 1:1 pages this hub’s citations resolve to — the twin’s own ground truth.
- nucaloric · contracts
- traxus · contracts
- dire-marsh-night · collectibles
- dire-marsh · collectibles
- dire-marsh · exploration
Sources
Every factual claim above is cited to primary Marathon source material — see Sources below. Cross-corpus connections and interpretation are the vault’s own; where the games are silent, this page says so.