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Oncolytic virus

Oncolytic Virus

Traits, Modifiers & Hosts That Change Cancer

Real oncolytic viruses are engineered to infect and burst cancer cells. In StrainBorn, a trait, run modifiers, host conditions, host genes and a city policy can make tumors weaker, richer, faster or more common.

On this page11
  1. Oncolytic Payload
  2. Oncolytic Strain
  3. Carcinogen Exposure
  4. Tumor Harvest
  5. Cancer Cartel
  6. Metastatic Cancer
  7. Chemotherapy
  8. Strong p53 Gene
  9. BRCA Mutation
  10. Contingencia Ambiental
  11. CRISPR vs. tumors

Oncolytic Payload

Cancer trait

A Cancer trait from mutation orbs: deal more damage to tumors and all their cells, assassins included.

  • Common +40%, Uncommon +52%, Rare +64%, Epic +80%, Legendary +100%, Mythic +128%, Prismatic +168%
  • Picking it again stacks
  • Offered only once cancer is unlocked, and less often than most traits
  • Multiplies with other tumor-damage bonuses
From the Codex

Oncolytic viruses infect and burst cancer cells; some are approved cancer treatments.

Oncolytic Payload in the Codex

Oncolytic Strain

Run modifier

A run modifier crafted between runs: tumors take double damage and pay out double, but every organ grows a tumor.

  • Upside: tumors take 2x damage and pay 2x
  • Drawback: every organ grows a tumor
  • Cost: 25 A, 25 T, 12 shards, 2 chaperones
  • In the Power-ups & tumors group
From the Codex

Consumables crafted between runs that change the next run.

Fun fact: A loaded modifier stays loaded until you run out of it.

Run Modifiers in the Codex

A run modifier crafted between runs: tumors pay out triple, but grow twice as fast and start a stage bigger.

  • Upside: tumors pay 3x
  • Drawback: tumors grow twice as fast and start at stage 2
  • Cost: 30 C, 15 G, 3 chaperones
From the Codex

Consumables crafted between runs that change the next run.

Fun fact: A loaded modifier stays loaded until you run out of it.

Run Modifiers in the Codex

Tumor Harvest

Modifier combo

Load Oncolytic Strain and Carcinogen Exposure together and destroying a tumor heals you fully.

  • Needs Oncolytic Strain + Carcinogen Exposure
From the Codex

Consumables crafted between runs that change the next run.

Fun fact: A loaded modifier stays loaded until you run out of it.

Run Modifiers in the Codex

Cancer Cartel

Modifier combo

Oncolytic Strain, Carcinogen Exposure and Nutrient Cache together: tumors pay 50% more and destroying one heals you fully.

  • Needs Oncolytic Strain + Carcinogen Exposure + Nutrient Cache
From the Codex

Consumables crafted between runs that change the next run.

Fun fact: A loaded modifier stays loaded until you run out of it.

Run Modifiers in the Codex

Metastatic Cancer

Host condition

The host is riddled with cancer: every organ grows a tumor that starts a stage bigger, grows faster and spreads twice more. Tumors pay out triple.

  • Every organ guaranteed a tumor, starting at stage 2
  • Tumors grow 50% faster and can spread 2 more times
  • Tumors pay 3x, and the whole run pays +30%
From the Codex

Metastasis is when cancer spreads from where it started to other organs through the blood or lymph.

A condition people can have.

Metastatic Cancer in the Codex

Chemotherapy

Host condition

The drugs wipe out immune cells and shrink tumors, but poison you too.

  • Tumors take 50% more damage
  • Immune cells have 30% less health and hit 20% softer
  • You have 20% less max health
From the Codex

Chemotherapy kills fast-dividing cells: cancer, but also immune cells, which is why patients catch infections easily.

A condition people can have.

Chemotherapy in the Codex

Strong p53 Gene

Host trait (good)

A helpful host gene: p53, the guardian of the genome, slows tumor growth.

  • Tumors grow 25% slower at the lowest tier, more on rarer hosts (up to 75%)
From the Codex

The person or animal you infect at the start of a run.

Fun fact: Rarer hosts have bigger effects and pay more nucleotides.

Hosts & Host Traits in the Codex

BRCA Mutation

Host trait (bad)

A harmful host gene found only in people: cells can't repair DNA, so cancers grow faster and spread further.

  • Tumors grow 30% faster at the lowest tier, more on rarer hosts
  • Tumors can spread one more time
From the Codex

The person or animal you infect at the start of a run.

Fun fact: Rarer hosts have bigger effects and pay more nucleotides.

Hosts & Host Traits in the Codex

Contingencia Ambiental

Pandemic city policy

Take Mexico City in Pandemic Game Mode and this policy puts a tumor in every organ, growing faster but paying double.

  • A tumor in every organ
  • Tumors grow 50% faster
  • Tumors pay 2x
From the Codex

In April 2009 the new H1N1 'swine flu' was identified in Mexico. Mexico City closed schools, restaurants and stadiums for days to slow what became the first pandemic of the century.

Fun fact: Mexico · population 21.8 million · North America

Mexico City in the Codex

While CRISPR is active, tumor cells you touch are cut apart, but cores and the leukemic stem cell resist.

  • Ordinary tumor cells are cut apart instantly
  • Tumor cores and the leukemic stem cell take 4x your damage per touch, up to twice a second
From the Codex

A bacterial immune system that remembers viruses and cuts their DNA with the Cas9 enzyme; scientists adapted it into a precise gene-editing tool.

Fun fact: Its discoverers, Jennifer Doudna and Emmanuelle Charpentier, won the 2020 Nobel Prize in Chemistry.

CRISPR-Cas9 in the Codex

See also