Pathogen Unlocks
How to unlock every Pathogenic pathogen: Bacteria, Helminth, Spore, Amoeba, Nanobot, Protozoa, Virus, and co-op Diatom requirements.
Starter and Early Unlocks
Bacteria is the default recommendation for first runs: balanced organelle slots, straightforward Secretor starters, and a forgiving plasmid tree for survivability nodes. Spore often unlocks early through basic progression milestones and suits players who want reliable ranged damage with minimal editor juggling.
Helminth emphasizes reach and elongated body layouts—unlock typically follows organ clears or plasmid spending thresholds tied to melee or length-based achievements. Check the in-game pathogen select screen for exact 1.0 requirements; Aberrant Labs reduced shared plasmid costs after Update 4, so unlocking alternate pathogens happens faster than demo-era grinds if you transfer demo progress.
Amoeba arrives as a shapeless blob with only three starting slots but gains new slots as the run progresses. It rewards frequent Tab editor use and appears in daily challenge rotations once unlocked. Invest stash slot plasmids before judging Amoeba harshly on first attempt.
Advanced Pathogens
Nanobot features one base health point offset by armor slots and a rigid grid ideal for defensive trait stacking introduced in 1.0. Protozoa and Virus skew toward specialist mechanics—minion multiplication, contact damage, or glass-cannon burst depending on patch tuning. Unlock conditions usually involve challenge completions, Heart clears on moderate Antibiotics, or plasmid tree milestones shared across pathogens.
Diatom is the two-player co-op pathogen, not a solo progression unlock in the traditional sense. Select it from the pathogen screen when a second player is ready. It shares plasmid investment differently than solo pathogens at launch—confirm current patch notes if an independent Diatom tree appears in future updates.
Use our pathogen tier list to compare strengths after unlock. Daily challenges may force pathogens you rarely play; spend five minutes in their plasmid trees before starting seeded leaderboard attempts.
Efficient Unlock Order After Launch
Recommended solo progression: master Bacteria or Spore through Heart on moderate Antibiotics, unlock economy plasmids on the shared cap, then branch to Amoeba for flexibility training and Nanobot for armor trait experiments. Helminth suits players who enjoy melee Phagocytosis challenge modes. Virus and Protozoa are reward pathogens for players who want fresh constraints after standard clears.
Demo plasmid transfer on July 16, 2026 launch accelerates unlocks if you invested demo time. Verify transfer on first full-game boot before spending fragments twice. Co-op unlocks are social—Remote Play Together lets friends join Diatom without owning separate accounts beyond the host.
Cross-read launch update, plasmid progression, and challenge modes guides when unlock prompts mention challenge completions you have not attempted yet.
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Frequently Asked Questions
Which pathogen unlocks first after Bacteria?
Spore and Helminth are common early unlocks depending on milestones. Check the pathogen select screen for live requirements.
Is Diatom locked behind progression?
Diatom is selectable for co-op sessions once you know how split controls work. It does not require a solo Heart clear at 1.0.
Do unlocks share plasmid caps?
Update 4 introduced a shared plasmid cap across pathogens with reduced node costs. Unlocking new pathogens is faster than demo builds.