Wiki portal
The Viruses
Every run you are one virion trying to take over a host. Start as Influenza A, then unlock the Retrovirus, the Halovirus and the Filovirus, each with its own signature move, ultimate and passives. Rival viruses turn up to fight you for the same host.
Articles
Choose your virusPlayable VirusesEvery run you play one virion trying to take over a host. All four viruses start with the same health, damage and fire…4
How every virus playsShared Virus RulesThese systems work the same way whichever virus you play.6
Influenza AInfluenza AInfluenza A keeps mutating its own shots, and every few seconds it fires something different.8
RetrovirusRetrovirusRetrovirus stores the cells it kills and brings them back as allies. It can also slip into latency, where nothing can…9
FilovirusFilovirusFilovirus wears cells down with bleeding, weakens what it bleeds, and heals as they bleed out.5
HalovirusHalovirusHalovirus is always in one of three variant forms. It spreads quietly, fires extra spike volleys and chains outbreaks…10
Adapting to the hostOrgan MilestonesThe first time your lineage reaches certain organs in Infect Game Mode, some viruses adapt for good. A banner…12EvolutionVirus JumpsYou don't buy viruses. You evolve into them. After each Infect Game Mode run you pick 1 of 3 mutations for the next…7
CompetitionRival VirusesOther viruses want this host too. Rivals unlock at level 9. After you clear a fight, a rival can burst in. Beat it for…11Key numbers
| Playable viruses | 4 |
|---|---|
| Rival virus species | 3 |
| Influenza A shot types (Antigenic Drift) | 4 |
| Halovirus variant forms | 3 (Swarm, Fury, Ghost) |
| Permanent organ milestone bonuses | 11 (Retrovirus 4, Filovirus 3, Halovirus 4) |
| Virus unlock levels | Influenza A 0 · Retrovirus 4 · Halovirus 8 · Filovirus 12 |
| Virus-jump mutations | 4 |
| Base health / damage / fire interval (all viruses) | 70 HP / 10 / 0.4 s |
| Ultimate radius | 300 (before upgrades) |
| Retrovirus reservoir | 6 stored cells |
| Retrovirus ally cap | 15 |
| Retrovirus kamikaze store | 5 |
| Antigenic Shift bolts | 16 |
| Chance a rival appears after a cleared fight | 6% |
| Chance an escaped rival returns after a later fight | 30% |
| Rival Viruses mechanic unlock | Level 9 |
| Virus-specific Petri Lab upgrades | 27 (Influenza A 7, Retrovirus 8, Filovirus 6, Halovirus 6) plus 5 shared core upgrades |