About This File
Xenomorph Domain
Description:
A large adult hive-mind overhaul for Stellaris built around the perfect organism. Play the Hive itself — grow the brood from ovomorph to Queen Mother, harvest hosts, subjugate broodstock tributaries, and remake worlds into living resin. Or stand on the other side of the glass: captor empires can contain, study, farm, and profit from the most dangerous species in the galaxy.
Military, economy, and exploration stay in a cold biological-horror register; the adult content lives inside the systems built for it, built and validated against the current Stellaris version with all DLC in mind.
This is a living WIP — updates ship frequently, and saves are best started fresh after major updates.
AI disclosure: this mod is heavily AI-developed — see the full note in the AI Development Disclosure section below.
https://discord.gg/v6WVHtR9S And here is a Discord server for those who'd like to join! throw up suggestions, report bugs, Chat about Aliens and shit!
Included Content:
* 1 Playable Species Class
* 3 Prescripted Empires
* 117 Species Traits and 24 Leader Traits
* 30 Civics and 10 Origins
* 119 Technologies
* 142 Buildings
* 83 Districts
* 98 Jobs
* 22 Army Types
* 23 Tradition Trees
* 16 Ascension Perks
* 21 Planet Types
* 14 Deposits and Blockers
* 15 Empire Personalities
* 93 Ship Components — 19 Weapons and 74 Utility Components
* 9 War Goals and 8 Casus Belli
* Custom portraits, AI-generated icons, espionage operations, war goals, relics, and the Hive Evolution Chamber menu
Current Features:
The Hive:
Playable Xenomorph Species — a dedicated XENO species class with a deep pool of biological, behavioral, and body traits. (seeded by Xenomorph Species Rework)
Three Brood Lineages — Standard Xenomorph, Spitter, and Deacon, each with its own prescripted empire and AI personality. (seeded by Xenomorph Species Rework)
Nine Origins — hive starts from apex Prime to the Queen Mother's Throne, Laboratory Escapees, Crashed Derelict, Scattered Brood, Acheron Survivor, and the Black Resin Spitter Cradle — plus two captor-side origins for everyone else.
Egg & Offspring Economy — drone clutches and royal egg-layers produce Xenomorph Eggs; brood tenders mature them into Offspring that pay for research chains, growth, and expansion. Run dry and the brood collapses.
The Royal Ladder — Queens, Brood Queens, Matriarchs, Empresses, and the Queen Mother as jobs, buildings, rulers, and guards, with Praetorian and Paladin defense castes.
The Hive Evolution Chamber — every pop the Hive converts feeds an Evolution Point pool; spend it in a dedicated menu to cultivate exotic war-castes: Widow, Pyrogen, Puppeteer, Warlock. (caste roster inspired by TGMC; menu inspired by Plague Inc)
War-Castes & Host-Lines — Runners, Lurkers, Spitters, Crushers, Chargers, Aquatic Stalkers, Neomorphs, Ravagers, and Boilers as armies; consumed host species unlock hybrid strains with their own traits. (TGMC and the Alien franchise)
The Capture Pipeline — the Raiding bombardment stance, battlefield leader captures, and fleet-wreck harvesting feed the Captive Pits, an interactive menu of long-form captive event trees.
Brood-Tribute Subjugation — defeated empires become permanent broodstock tributaries; the galaxy answers with the Restraint casus belli that frees every subject the Hive holds.
Divergent Brood Ecologies — fully infested worlds mature into one of five permanent ecological roles, so no two hive worlds read the same.
Planetary Adaptation — gradually raise Xenomorph habitability through different approaches, costs, and risks. (seeded by Xenomorph Species Rework)
Black Resin Development — cultivate hive worlds into resin networks and Black Resin Brood-Worlds, the advanced end-state of world consumption. (seeded by Xenomorph Species Rework)
Queen-Network Systems — capped, tech-gated research and diplomatic interactions with known Xenomorph empires, managed from a report dashboard. (seeded by Xenomorph Species Rework)
Adaptive Strain Cycle — the brood periodically mutates between Hyper-Aggressive, Docile Breeder, and Infiltrator strains. (seeded by Xenomorph Species Rework)
Galactic Infestation — infestation spreads innately through contact with every Xenomorph empire; the Virulent Strain civic amplifies it. (seeded by Xenomorph Infection)
Brood Architecture — specialized Queen, military, breeding, research, recycling, and harvesting buildings across the hive economy. (seeded by Xenomorph Species Rework)
The Captors:
Xeno Traffickers & Xeno Keepers — origins that begin with an enslaved Xenomorph secondary species (the trait locked in from creation) as stock-in-trade or livestock.
The Captor Industry — containment labs, specimen vaults, breeding programs, rendering works, exhibition galleries, and corporate civics from trafficking syndicates to eradication mandates. (adult systems built on Lustful Void)
The Captive Queen — hold a living Matriarch: condition her, breed her, ransom her, display her, or lose her to a containment breach, through her own interactive menu.
Biosecurity & Containment — anti-xenomorph civics, technologies, and tradition trees for ordinary empires that would rather survive the Hive than own it. (seeded by Xenomorph Infection)
Both sides:
23 tradition trees covering captures, brood development, infestation, containment, and ascension, with 16 ascension perks.
Compat patches for Ethics & Civics: Bug Branch and Expanded Gestalts: Forgotten Queens ship alongside the mod.
x21 Planet Types — five infested world families, each with Fortress / Brood / Foundry specializations, plus the resin end-state
Xenomorph Hive World — plus Fortress, Brood, and Foundry specializations
Tendril World — plus Fortress, Brood, and Foundry specializations
Infested Ring World — plus Fortress, Brood, and Foundry specializations
Infested Hive City — plus Fortress, Brood, and Foundry specializations
Infested Ocean World — plus Fortress, Brood, and Foundry specializations
Black Resin Brood World — the advanced end-state of world consumption
x23 Tradition Trees — 23 Tradition trees across hive, captor, corporate, and defensive play
Hive trees (12): Xeno Lifecycle, Breeding Rapture, Draconic Parasitism, Captive Harvest, Genetic Hoarding, Queenly Dominion, Hidden Infestation, Livestock Dominion, Voidbrood Mastery, Sovereign Court, Brood Ascendancy, Blight Ascendant
Captor trees (4): Xenomorph Brood Harvest, Xenomorph Specimen Galleries, Xenomorph Vivisection, Captive Xenomorph Dominion
Corporate trees (5): Egg Production, Xeno Acquisition, Offspring Production, Flesh Trade, War Assets
Defensive trees (2): Biosecurity Doctrine, Xeno Defense
x31 Civics + x9 Origins — hive doctrines, corporate exploitation, and anti-xenomorph defense
Hive civics (18): Hunter Brood, Resin Dominion, Shadow Brood, Virulent Strain, Ravenous Brood, Devouring Swarm (reworked), Xenomorph Psychic Choir, Xenomorphs Blood Mining, Matriarch's Hunger, Patriarch's Dominion, Queen Matriarchy, Planetary Adaptation, Adaptive Strain Cycle, Synaptic Ganglion, Metabolic Strip-Mining, Digestive Assimilation, Fecund Brood, Hatchery Doctrine
Corporate captor civics (8): Aliens of War, Treasured Queens, Apex Menagerists, Xeno Husbandmasters, Brood Covenant, Outbreak Brokerage, Pleasure Syndicate, War Brokerage
Anti-xenomorph civics (5): Eradication Mandate, Biosecurity Directorate, Quarantine Authority, Xenobiological Taskforce, Expeditionary Hazmat Corps
Origins (9): Xenomorph Prime, Queen Mother's Throne, Laboratory Escapees, Crashed Derelict, Scattered Brood, Acheron Survivor, Black Resin Spitter Cradle — and for everyone else, Xeno Traffickers and Xeno Keepers
x142 Traits — 118 species traits and 24 leader traits
Core biology (22): Xenomorph, Xenomorph Metabolism, Xenomorph Carapace, Xenomorph Blood, Xenomorph Psychic Organ, Aggressive Implanters, Rapid Maturation, Brood Parasitism, Ovomorph Abundance, Ravenous Metabolism, Hyper-Aggression, Queen Dependency, Light Sensitivity, Disposable Drones, Genetic Memory, Hyper-Adaptive Genome, Unstable Morphology, Black Goo Touched, Undying Matriarch, Genetically Manipulated, Accidental Variation, Controllable Risk
Environmental adaptations (5): Void Nesting, Toxic Resilience, Frost-Hardened Chitin, Dune Burrowers, Abyssal Hivebreed
Hostlines & hybrid strains (17): Mammalian / Reptilian / Avian / Arthropoid / Lithoid / Psionic / Cybernetic Hostlines, plus the consumed-host hybrids: Mammalian, Arboreal, Acid-Gland, Heavy-Carapace, Adrenal, Aquatic, Spore, Reptilian, Lithoid, and Cybernetic Xenomorph strains
Reproductive traits (8): Engorged Ovipositor, Barbed Ovipositor, Multiple Ovipositors, Prolific Seeder, Narcotic Seed, Virile Musk, Pleasure-Bred, Tentacle Addicts
Brood body traits (52): a full anatomy of breast, milk, canal, cervix, womb, hip, and tail-framed traits — from Streamlined Brood Breasts and Royal Brood Milk through the Sealed Breeding Canal, Cervical Lock Rings, Royal Incubation Womb, Brood-Bearing Hips, and their kin — each tuned to specific jobs and castes
Behavior traits (10): Pheromonal Claiming Instinct, Predatory Mating Drive, Brood-Dominant Temperament, Pheromone-Drunk Males, Heat-Driven Hive Lust, Perfect Organism Instincts, Ambush Predator Cunning, Hive-Bound Obedience, Host-Pattern Adaptability, Acid-Blooded Ferocity
Leader traits (24): the caste ladder from Worker Breed, Drone Caste, and Warrior Caste through Praetorian Lineage, Royal Bloodline, and the Immortal Queen Mother — plus Perfect Organism, Titanic Carapace, Pheromone-Laced Presence, Terror-Mount Commander, the Dark lineage (Stalker, Enforcer, Praetorian, Elder Praetorian), and more
Anti-xenomorph hardening (4): Bio-Sealed Lineage, Quarantine-Adapted, Xenobiology-Screened, Combat-Resistant Hosts
Requirements:
Lustful Void by Lithia<3 — REQUIRED!
UI Overhaul Dynamic — strongly recommended (no patch needed)
Installation:
Extract the zip contents to (...\Documents\Paradox Interactive\Stellaris\mod) — if you don't have a "mod" folder, create one there.
The archive contains "Hive mods.mod" and the "Hive mods" folder; both go directly into the mod folder.
Delete the old mod folder and .mod file before extracting a new version. Clean installs are the supported path.
Load order:
Lustful Void
—
Xenomorph Domain
—
XD Compat - Bug Branch (only if you use Bug Branch — load AFTER it)
XD Compat - Forgotten Queens (only if you use Forgotten Queens — load AFTER it)
—
UI mods last
To-Do List!/Bug to be fixed!
- New Xenomorph Ship models or Ship Reskin
- Regeneration of Trait and Civic Icons for distinction
- Further Development of Captive Interaction Menu, choices, and consequences(Still currently WIP but Available in mod)
- SFW Version of the mod
- Mod Penal (Similar to Kasko mod menu)
- Organize proper images for event displays
- Adjust Infection to be manual through espionage rather than automatic initial seeding.
Suggested Ideas
By Ton10p
multi target hive scream weapon, i love that but i would like it to have more upgrades in tech and apply to as many weapon slots as possible )fitting in a large would be the first desired one.
-make the point defense a multi target wide (0-60) range system that instead of being a excessive rapid fire it will fire 10 times a day and deal 5-10 damage with 200% additional damage to hull
-a bombardment stance that deals mainly if not only infections on colony's that way if you cant fight or don't want to you can theoretically cripple them by leaving them a excessive amount of hidden infections that over time without a huge military presence to fight off the frequent invasions (the deposits create army's over time and then spawn them yearly or faster point is to feel like one is fighting stronger and stronger infections and the anti xenomorph techs reduce the negative modifiers on the colony) and if bombarded long enough the army's spawned will be gigantic (the deposits are only removable by excavation (when started a giant army appears) and each deposit increases the strength of all invader army's meaning if a huge amount is present not only will they be numerus but they will be buffed by the other deposits)
gigastructual engineering compatability (build more then one Maga structure unique to the mod)
a futa empress ethic
job efficiency that goes from empresses giving lower queens job efficiency bonuses and queens themselves giving other hive jobs job efficiency. kina like a mentorship thing
and having empresses and queens giving leaders experience bonuses
Evil Creature
How about a non-lethal facehugger strain?
Such an optional civic/trait/tradition would add some much-needed flavor to patriarch-run hives. Captives are valuable and scarce; using them as disposable incubators can be suboptimal for the long-term success of the collective. Certain strains would evolve to circumvent that inefficiency, taking advantage of the host’s anatomy. Why burrow an extra hole when there’s a perfectly usable exit down below?
Of course, having necrophagy enabled would get you a quicker pop boost. Repeated host incubation cycles would be better for slower, more consistent growth.
Flavor-wise, captive pops could gain additional traits representing the physiological changes brought on by years of captivity. Some of these could be added manually to increase the output. Here are a few examples from the top of my head:
This organism lost the ability to secrete digestive enzymes. Chemical irritants can no longer hinder incubation.
+20% incubator job efficiency
+30% food consumption
After repeated implantation and choking by facehuggers, this organism acclimated to prolonged periods of low oxygen availability.
+10% habitability
Pressure and constant movement caused by the larval Xenomorph promote thickening of gastrointestinal walls. Breaks between incubation cycles are no longer necessary.
+20% incubator job efficiency
+5 years leader lifespan (If the pop is rescued and able to create leaders for rescuer faction)
Toostor1
- Change Brood Covenant to an origin instead of a civic so it can function like Cybernetic Creed
- - Treasured Queens civic allows one to acquire new queens to use as leaders if possible
- - List the effects of each xeno tradition used as without going into the files, we don't know what each one does exactly
- - The abillity to terraform the xeno hive worlds into something more useful for non-xeno empires
- - Create a tradition (or Ascension Perk) that lets you turn your entire main species into xenomorphs like Synthetic Evolution (if possible, choosing to become an Individual Xenomorph Empire or Hive) ultimately fulfilling the Brood Covenant's goal and ascending to Xenomorphic bliss
Padawan Tano
a version of the mod that doesn't tie xenomorph traits/origins etc. to their species?
Frontenlaufer
plans for Xenocult support
Pending Fixes:
- Devouring swarm is available for xenomorph empires (There is a version of devouring swarm for xenomorph empires)
- Blank "+10%" on Xenomorph Prime and Queen Mother
- Infection Rebalancing
- Unable to go to war
- Buildings popping in and out on Xenomorph infested planets
- Alloy foundries disappearing from non hive worlds
- Spawning pool/Royal jelly building, not functioning as proper spawning pool replacer(Acting as egg spawning source instead)
Recent Changelog: Version 5.10
Changelog history:
Version 5.8
Following this Version I've changed the way I'm working on the mod. Future updates might come out a tad slower, or faster! hopefully with less bugs and issues!
Version 5.7
Version 5.5
Version 5.4
Version 5.3
New Features
The Hive Evolution Chamber. A new empire edict opens the Evolution Chamber — a dedicated menu crowned by a green-yellow hex-lattice of the brood's expanding genome. Every pop your Hive converts feeds a pool of Evolution Points; spend them in the Chamber to cultivate four exotic assault castes along a short branching path: the Widow (a cheap spawning swarm), the Pyrogen (living incendiaries), the Puppeteer (necrotic terror troops), and the Warlock (the psychic capstone). The more the Hive consumes, the stranger it becomes.
Brood-Tribute Subjugation. Winning a Brood-Tribute war now binds the defeated empire to the Hive permanently as an oppressive tributary — a standing herd, kept and drawn from for as long as the Hive wills it.
Restraint — the galaxy's immune response. Other empires gain a counter casus belli against any Hive that holds tributaries. Victory frees every subject the Hive holds, and the freed remember their liberator.
Divergent Brood Ecologies. When planetary adaptation completes, each infested world (unless bound for the Black Resin) matures into one of five permanent brood-ecology roles — Spawning Grounds, Hunting Grounds, Synaptic Shoals, Acid Marshes, or Carrion Fields.
New Content
Three world-doctrine civics for hive empires: Synaptic Ganglion (the Hive's first empire-size lever), Metabolic Strip-Mining (the crust is food — plus an exclusive decision that chews worlds down to husks), and Digestive Assimilation (stronger armies; every won invasion triggers an empire-wide Digestion Surge).
Two egg-economy civics: Fecund Brood (egg-laying castes produce more) and Hatchery Doctrine (faster hatching, better storage).
Two research-locked assault castes: the Ravager Pack (melee elite) and the Boiler Battery (fragile long-range acid artillery).
Balance Changes
Streamlining sweep: removed dormant and never-finished content, merged redundant buildings into clean upgrade chains, reduced clutter. Nothing visible in a normal game was lost.
Two tradition picks that granted nothing but a tooltip now carry real effects.
The carapace forge building chain is buildable again.
Brood-Tribute's immediate plunder was trimmed — the permanent tributary is the reward now.
Fixes
The monthly colony flicker is gone. A one-time colony-setup routine was wrongly re-running every month, briefly stamping hive districts onto worlds that can't hold them and re-adding buildings that a mismatched self-destruct check immediately tore down. It now runs exactly once per colony, the self-destruct checks were corrected, and colonies without any xenomorph population can no longer end up with no valid capital building.
The unavoidable start-of-game collapse is gone. Every hive start was seeded with a research building that drains Xenomorph Offspring before any producer exists — guaranteeing a deficit spiral into a ten-year bankruptcy that demolition couldn't escape. Instead, every hive colony now starts with a Hatchling Nursery, the offspring producer the economy expected all along.
The introduction primers no longer overflow the screen (oversized under UI Overhaul Dynamic). Both are now short cover pages with per-topic sections you browse like a menu; nothing was cut.
The captor origins' Xenomorph stock is a true Xenomorph again. The Kept Xenomorphs secondary species (Xeno Keepers / Xeno Traffickers) now starts with the Xenomorph trait locked in — previously it couldn't be picked at creation, which also locked out every dependent xenomorph sub-trait.
Royal Jelly Pods come pre-built on every Xenomorph empire start — the origins that didn't seed them (Acheron Survivor, Black Resin Spitter Cradle, Deacon Brood) now begin with them too.
Fourteen buildings finally explain themselves — the royal capital chain, egg chambers, host-processing line, Submission Den, Hunt Arena and more had placeholder descriptions; each now describes what the structure is for and how its castes fulfill it.
The three prescripted Xenomorph empires were being silently hidden from the empire-selection list; rebuilt and visible again.
Hive-only civics no longer appear in other empires' civic menus, and anti-xenomorph civics no longer appear for gestalts.
The Galactic Infestation civic was renamed Virulent Strain — the infestation itself is innate to every Xenomorph empire; the civic only amplifies it.
The Black Resin origin's homeworld now seeds the correct hive-world districts.
A deep verification pass revived a family of silently dead script: the hive-world conversion one-project-at-a-time interlock works (and locks against vanilla arcology again), the queen-capture decision actually resolves instead of eating its cost, several purge outcomes now fire, the egg-storage caretaker grants its full capacity bonus, hive-empire job variants receive the same category bonuses as everyone else, both custom bombardment stances show real names, and assorted parse errors and unreadable tooltips were cleared.
Cleaned broken "?" icons out of the Xeno Traffickers, Xeno Keepers, and Aliens of War tooltips.
Localisation repairs: missing job plural forms no longer leak raw text into tooltips, the Specimen Gallery renames were re-attached to their correct internal keys, and the Broodmare Pen family (technology, building, job) had its missing text restored.
UI & Icons
31 new custom icons: 12 civic icons, 12 job icons, and 7 tradition pick icons — the five Brood Harvest picks finally each have their own icon.
A custom green-yellow hex-lattice banner headlines the Hive Evolution Chamber.
Redundant "available only to..." and "cannot be combined with..." tooltip lines were stripped — the menus already show what you can and cannot take.
Bug Branch preset support: the three prescripted Xenomorph empires now appear in the empire list when playing with Ethics & Civics: Bug Branch — the compat patch gives them the extra gestalt ethics Bug Branch requires, each themed to its hive: the hunter, the resin-builder, and the disease.
Forgotten Queens: the Parasitic Embryos civic is now unavailable to Xenomorph empires via the compat patch — implanting embryos in captured hosts is already what the Hive is.
Bug Branch: the Terravore civic is excluded for Xenomorph empires via the compat patch — its identity is covered by the Hive's own doctrines.
Both compat patches must be enabled and load after Bug Branch / Forgotten Queens.
Installation portability fixed: descriptor files now use relative paths, so the mod registers correctly on any machine without editing
Compatibility
Patches:
NOT COMPATIBLE
POSSIBLY COMPATIBLE
COMPATIBLE
Adult-mod family:
Lustful Void Fixes
LV Extensions
LV Gender Patch
LV Tempting Tides
LV Things That Overwrite Base Game Files Go Here
LV and Bug Branch Patch
Family Oriented
Mango's Lewd Diplomacy
MLD + Vassals Expanded Patch
Raid and Conquer
Lewd Galaxy Fixed
Needs XD's own compat patch enabled:
UI: Mods
Portraits / shipsets / cosmetic:
Traits/leaders:
Species / psionic / bio:
Origins:
Ascension perks/traditions:
Civics/government / politics:
Events / story / crisis:
Space fauna / dragons:
Planets / worlds / features:
Galaxy generation / sensors:
Ships / military / components / armies / economy:
Real Space suite (verified zero-conflict):
AI/performance / fixes / frameworks / utility:
Player support!
As you can see, this is a large and expansive mod with many features and mechanics. Although I know how to use AI to script and program mechanics and features into the game, I am incredibly bad at generating the kind of images I want.
So if you would like to support the mod by designing images and icons for certain traits, events, or buildings. Please don't be afraid to reach out to me. You will be mentioned in a support list for your contributions
AI Development Disclosure:
This mod has been heavily developed with AI. The scripting and coding — events, civics, jobs, buildings, traditions, and the systems that tie them together — were written and debugged with AI assistance (Claude), working against the game's real files under human direction and playtesting.
The custom icon images are AI-generated (civic, job, and tradition icons, and the Evolution Chamber banner).
Design decisions, content direction, and testing are human; if you object to AI-assisted content, this mod is not for you.
Inspiration & Credits:
Lithia<3 — Lustful Void, the foundation this mod stands on (and the inspiration for this page).
Calcifire — Calcifire's Trait Pack for LV.
NickVirgo — Xenomorph Species Rework and Xenomorph Infection, whose early versions seeded several of this mod's systems before they diverged into their current forms.
The Alien / Alien vs Predator franchise — the perfect organism itself: ovomorphs, facehuggers, Queens, the Alien 3 runner, Covenant's Neomorphs.
TGMC (/tg/station Marine Corps) — the xenomorph caste roster that inspired the war-caste system.
Plague Inc — the inspiration for the Evolution Chamber's spend-to-evolve board.
Permissions:
Franchise concepts belong to their respective owners; borrowed inspiration is credited above.
Submods are welcome, as well as custom patches, which may be uploaded to a patch list on the main page.
Owners of any art or characters featured in this mod have the right to request its removal from the mod at any time, no reason needed.
Edited by Xenodragon54
Bug Report instructions update
What's New in Version 5.10
Released
I've made a Discord! Hastily made! I'll organize it more properly later, but anyone is welcome to join!