Pathogenic organelles are the four categories of modular attachments you draft onto your parasite during a run: Flagella, Mitochondria, Secretors, and Spikes. They attach through touching adjacency or connected networks, and mutations modify them in place — Update 4 adds multi-hit attacks to supported Secretors and Spikes. The 7 Aug 2026 'New Patch: Balancing Adjustments' entry added an additive Overcharge stacking change ('+' tooltips add to the existing bonus; worked example +100% + +40% = +140%) and rebalanced Lateral Emitter damage scaling, Katanosome overcharge crit, Phagosome overcharge damage per kill, Peroxisome explosion double-dipping, and Mucus Emitter orb growth curve, plus Lil Collector DNA pickup / interact / dodge speed. On the damage-scaling layer, the pathogenicgamewiki Burn build guide names Oxidator (Burn rarity multiplier, doubles at Epic+), Pyroflagellum (Burn dodge trail), Pyrogenesis (Burn spread on kill), and the Toxisome organelle (Toxin damage-over-time, does not feed Burn stacks, Burn application rate, or the Oxidator Epic+ multiplier). The in-game Codex mirrors the categories the pathogenicgame.com overview, Slug Disco game-info, and the Update 4 devlog list; this page is the canonical read for per-organelle contribution checks and explicitly excludes full per-organelle Codex entries.
The four Pathogenic organelles categories
Pathogenic's organelles are not biology-first; they are a roguelike drafting system. The pathogenicgame.com overview and the Slug Disco game-info page together name the four categories that the 1.0 launch build ships with. The Update 4 devlog (Multi-Hit Attacks) extends the Secretor and Spike categories with a mutation that changes how they hit.
The four Pathogenic organelles categories
Flagella
Flagella are the organelle category that controls how the parasite moves through a biome and how contact damage is applied on touch. The Slug Disco game-info page places Flagella in the movement-and-contact role; the 10 Advanced Tips video treats Flagella drafting as a role decision rather than a stat pick. Beginners should read a Flagellum's trait text before drafting it, because two Flagella can carry different movement profiles.
Mitochondria
Mitochondria are the organelle category tied to how often mutations and special abilities trigger. The pathogenicgame.com overview frames Mitochondria as the cadence-setting category for a run. The idreamofindie Pathogenic review treats Mitochondria as the single most under-valued beginner pick because the trait text is easy to skim; players who do not read the trigger-rate line often under-draft Mitochondria and lose a tempo advantage they did not know they had.
Secretors
Secretors are the organelle category that drives projectile behavior. The Update 4 devlog (Multi-Hit Attacks) explicitly adds multi-hit attacks to supported Secretors, meaning a single projectile can land more than one hit on the same target. The devlog is attributed to Slug Disco and is the canonical source for the multi-hit-attack change.
Spikes
Spikes are the close-range organelle category that handles the parasite's behavior at point-blank range. The Update 4 devlog extends Spikes with multi-hit attacks in the same release, so a close-range Spike draft can now layer additional hits on the same target. The 10 Tips and Tricks video frames Spikes as the right pick for melee parasites that want to convert a single contact into a multi-hit trade.
Internal organelles
Internal organelles are the category the pathogenicgame.com overview names for organelles that sit inside the parasite body rather than at the surface. The 1.0 launch sources do not enumerate each Internal organelle by name the way they enumerate Flagella, Mitochondria, Secretors, and Spikes. The Pathogenic builds page is the right next page for how Internal organelles interact with build archetypes.
How Pathogenic organelles attach to your parasite
Organelles attach to the parasite through two distinct physical rules. The idreamofindie Pathogenic review and the 10 Advanced Tips video both walk through the same rule pair, and the Slug Disco game-info page frames the rule pair as the spine of the in-run editor.
How Pathogenic organelles attach to your parasite
Touching adjacency
Touching adjacency is the loose-attachment rule. Any organelle that physically touches the parasite body counts as attached and contributes its trait. This is the most permissive rule and is what beginners see first; the in-run editor highlights a touching organelle in the same color the parasite body uses. Touching adjacency is what makes the first biome forgiving: even an awkward draft still contributes something.
Connected networks
Connected networks are the strict-attachment rule. A connected network is a chain of organelles that touch one another and the parasite body, so the parasite gets the trait of every organelle in the chain rather than just the ones touching the body. The 10 Advanced Tips video credits understanding connected networks as the biggest leap from beginner to intermediate play, because a four-organelle connected network can deliver four traits at once. The idreamofindie Pathogenic review frames the editor choice as "touching adjacency for safety, connected networks for payoff." A safe draft fills adjacent slots and keeps the run alive; a payoff draft builds a connected network that the next biome can lean on.
How mutations modify organelles in place
Mutations modify organelles rather than replace them. The Update 4 devlog (Multi-Hit Attacks) is the clearest example: a supported Secretor or Spike receives a multi-hit-attack mutation that changes the organelle's hit count without changing its category or trait text. The 10 Evolution Secrets video frames mutations as the layer that takes a draft from "what the parasite is" to "what the parasite does in the current biome."
How mutations modify organelles in place
Update 4 multi-hit attacks
Update 4 is the Slug Disco devlog entry that adds multi-hit attacks to supported Secretors and supported Spikes. The devlog is attributed to Slug Disco and is the source for the specific mechanic. As of 2026-08-05 the multi-hit-attack change is in the 1.0 launch build; a future devlog could extend the same change to a different category.
Mutation triggers, not mutation replacements
The 10 Advanced Tips video is explicit that mutations in Pathogenic trigger new behaviors on existing organelles rather than swapping one organelle for another. A Mitochondrion that triggers more often after a mutation is still the same organelle category, and the in-run Codex still shows the original Mitochondrion entry with a flagged mutation line.
Reading the in-game Codex
The Codex is the in-game reference that mirrors the categories the official sources name. The 10 Evolution Secrets video frames the Codex as the right place to confirm a category's current trait text before drafting. Three Codex habits from the cited sources: 1. Open the Codex before a shop visit. The shop is the only reliable place to convert currency into a specific organelle, and reading the Codex first prevents a draft that does not match the parasite role. 2. Re-read the trait text on every mutation. A mutation's trait line is what flips the build, not the category alone. 3. Use the Codex to compare two organelles in the same category. Two Secretors can carry different traits and the Codex is the only way to see the difference without spending the draft slot. The Pathogenic builds page is the right next page for the per-parasite archetype reading; the Pathogenic beginner guide is the right entry point for new players who have not seen the Codex open yet.
Recent balance changes (7 Aug 2026 patch)
The 7 Aug 2026 "New Patch: Balancing Adjustments" entry on the Steam News hub for AppID 3808690 rebalanced several organelle-facing and pet-facing systems. The Pathogenic organelles page records the high-level effects the patch body documents; specific numerical values beyond what the patch body lists are not invented here. The six change categories that affect the organelle surface: - **Lil Collector DNA pickup range.** The 7 Aug 2026 patch increased the range at which the Lil Collector picks up dropped DNA. - **Lil Collector interact range.** The same patch increased the range at which the Lil Collector can interact with objects in the room. - **Lil Collector dodge speed.** The same patch made the Lil Collector dodge speed more consistent. - **Lateral Emitter damage scaling.** The 7 Aug 2026 patch rebalanced Lateral Emitter damage scaling against the room loop's immune-cell and rival-parasite spawns. - **Katanosome overcharge crit.** The 7 Aug 2026 patch rebalanced the Katanosome overcharge crit behavior, which interacts with the melee archetype's Spike drafts. - **Phagosome overcharge damage per kill.** The 7 Aug 2026 patch rebalanced Phagosome overcharge damage per kill, which interacts with the ranged archetype's Secretor drafts. - **Peroxisome explosion double-dipping.** The 7 Aug 2026 patch fixed Peroxisome explosion double-dipping so a single explosion no longer registers as two damage events against the same target. - **Mucus Emitter orb growth curve.** The 7 Aug 2026 patch rebalanced the Mucus Emitter orb growth curve so orbs reach their cap on a more predictable trajectory. - **Additive Overcharge stacking.** The 7 Aug 2026 patch changed Overcharge stacking from multiplicative to additive. The pathogenicgamewiki Overcharge guide is the cited source for the tooltips convention ('+' tooltips add to the existing bonus, 'x' tooltips multiply it; worked example +100% + +40% = +140%). A live Steam discussion titled 'Overcharge +% does it affect charge times?' posted in the Pathogenic Gameplay Discussions hub four days after the patch confirms that the community is still parsing the additive vs multiplicative distinction. Each change above is sourced from the 7 Aug 2026 Steam News "New Patch: Balancing Adjustments" entry on the Steam News hub for AppID 3808690. The [/faq](/faq) page carries the six post-launch player-cluster questions (rarity combine rules, Refiner mythic creation, cancerous trait mechanics, attack-infuser vs weapon-infuser, Lil Collector post-patch behavior, and melee-vs-ranged contact-damage) that these balance changes prompted.
Per-organelle contribution checks: Overcharge, Burn rarity multipliers, and the Toxisome toxin-vs-Burn distinction
The Pathogenic organelles page is the canonical read for per-organelle contribution checks; the [/faq](/faq) page explicitly excludes full per-organelle Codex entries. This module names the organelles the cited wiki guides call out on the damage-scaling layer, and the per-organelle Codex entries themselves remain on the in-game Codex and the wiki guides rather than being reproduced here. ### Overcharge connection rules on the organelle surface (Mitochondria chain arrows, kill-trigger vs repeatable sources) The pathogenicgamewiki Overcharge guide records Overcharge as an organelle-to-organelle chain: Mitochondria carry the chain arrows that route Overcharge stacks from one organelle to the next. Valid connections require a chain arrow between a Mitochondrion and a downstream organelle. Overcharge sources split into kill-trigger sources (fire on a kill event) and repeatable sources (fire on a per-shot or per-hit event without depending on a kill). The wiki Overcharge guide is the cited source for the connection rules and the source-type split; the Brain boss wiki guide (see /boss-progression) records kill-trigger Overcharge as one of the failure modes that wipes a Brain-route run because the Brain boss has no consistent kill rhythm during the fight. ### Burn rarity multipliers on the organelle surface (Oxidator doubling at Epic+) The pathogenicgamewiki Burn build guide records Burn as a rarity-driven multiplier on the organelle surface. Oxidator doubles its Burn damage at Epic+ rarity and above. The wiki Burn build guide is the cited source for the rarity multiplier; this page does not invent specific Burn damage-per-tick numbers beyond what the wiki guide records. ### Toxisome-toxin-vs-Burn distinction on the organelle surface (Toxisome does not feed Burn) The pathogenicgamewiki Burn build guide records the Toxisome organelle as a Toxin damage-over-time channel rather than a Burn channel. Toxisome Toxin does not feed Burn stacks, Burn application rate, or the Oxidator Epic+ multiplier. The wiki Burn build guide is the cited source for the channel split; the [/builds](/builds) damage-scaling module carries the worked example. ### Per-organelle Codex boundary This module names the organelles the cited wiki guides call out (Mitochondrion on Overcharge chain arrows, Oxidator on the Burn rarity multiplier, Toxisome on the Toxin-vs-Burn distinction). The full per-organelle Codex entries are on the in-game Codex and the pathogenicgamewiki Burn and Overcharge guides; this page does not reproduce those entries, and the /faq page explicitly excludes full per-organelle Codex entries.
Sources
Sources checked 2026-09-01.
FAQ
What are the organelle categories in Pathogenic?
Pathogenic organelles are grouped into four categories: Flagella (movement and contact damage), Mitochondria (mutation and ability trigger rate), Secretors (projectile behavior), and Spikes (close-range behavior). The pathogenicgame.com overview and the Slug Disco game-info page both name the same four categories, and the Update 4 devlog (Multi-Hit Attacks) extends the Secretor and Spike categories with a multi-hit-attack mutation. The Pathogenic organelles catalog also lists an Internal organelle category, which the official overview names without enumerating each entry.
How do organelles attach to the parasite?
Organelles attach through two rules. Touching adjacency counts any organelle that physically touches the parasite body, which is the permissive rule beginners see first. Connected networks count a chain of organelles that all touch one another and the parasite body, so the parasite gets the trait of every organelle in the chain. The 10 Advanced Tips video and the idreamofindie Pathogenic review both walk through the same rule pair.
What does the Update 4 multi-hit attacks change do?
The Update 4 devlog (Multi-Hit Attacks) adds multi-hit attacks to supported Secretors and supported Spikes, so a single projectile from a multi-hit Secretor or a single contact from a multi-hit Spike can land more than one hit on the same target. The devlog is attributed to Slug Disco and is the canonical source for the mechanic. As of 2026-08-05 the change is in the 1.0 launch build.
How do mutations interact with organelles?
Mutations modify organelles in place rather than replacing them. A multi-hit-attack mutation on a Spike leaves the Spike as a Spike; the mutation line in the Codex shows the new behavior. The 10 Advanced Tips video frames this as the layer that takes a draft from "what the parasite is" to "what the parasite does in the current biome."
Where do I read the full organelle catalog?
The in-game Codex mirrors the categories the official sources name. Outside the game, the pathogenicgame.com overview and the Slug Disco game-info page are the official category list, and the Update 4 devlog is the canonical source for the multi-hit-attack change. The Pathogenic organelles page is the launch-site reference for the category list and the attachment rules.
Is Toxisome Burn in Pathogenic, or is it a separate damage-over-time channel?
Toxisome is not Burn. The pathogenicgamewiki Burn build guide records the Toxisome organelle as a Toxin damage-over-time channel rather than a Burn channel. Toxisome Toxin does not feed Burn stacks, Burn application rate, or the Oxidator Epic+ rarity multiplier. The wiki Burn build guide is the cited source for the channel split; the /builds damage-scaling module is the canonical read for the worked Burn and Toxin example. The /faq page explicitly excludes full per-organelle Codex entries; the in-game Codex and the wiki Burn build guide are the right places for the per-organelle Codex entries themselves. (Sourced from the pathogenicgamewiki Burn build guide.)