Xenos Civilizations

The Alien Galaxy

Humanity is only one of many intelligent species occupying the galaxy.

Alien civilizations range from ancient empires and interstellar coalitions to nomadic fleets, mercenary kindreds, isolated enclaves, predatory swarms, and forgotten species surviving on a handful of worlds.

The Imperium uses the term xenos for all alien life, regardless of origin or culture.

This broad label conceals enormous differences.

An Aeldari seer, Kroot mercenary, Ork warlord, Necron noble, and T’au diplomat are not members of one shared civilization. They may hate one another as much as they oppose humanity.

Understanding these differences can determine whether an encounter becomes a battle, negotiation, temporary alliance, or disaster.

Imperial Xenophobia

Imperial doctrine generally teaches that xenos are threats to humanity.

This belief is not based entirely on ignorance.

Human worlds have been conquered, enslaved, consumed, raided, infiltrated, and destroyed by alien powers. Ork invasions can devastate entire systems. Drukhari raids carry populations into slavery. Tyranid hive fleets consume all biological life. Genestealer cults corrupt societies from within.

Yet Imperial policy rarely distinguishes between hostile empires, neutral traders, isolated populations, and possible allies.

Peaceful contact, trade, and cooperation may be condemned even when they are necessary for survival.

Imperial authorities fear that tolerance will lead to dependence, contamination, rebellion, or alien control.

Some officials secretly negotiate with xenos while publicly condemning them.

The Aeldari

The Aeldari are an ancient species whose civilization once dominated much of the galaxy.

Their empire collapsed in a psychic catastrophe that created the Eye of Terror and gave birth to the Chaos God Slaanesh.

Surviving Aeldari follow several different paths.

Craftworld Aeldari live aboard immense world-ships and preserve their people through strict traditions known as Paths. They are guided by seers who interpret possible futures and act to prevent the extinction of their species.

Aeldari are swift, psychically gifted, technologically advanced, and long-lived.

They may manipulate human events to prevent greater disasters, sometimes sacrificing entire populations to save a smaller number of their own people.

Temporary alliances with humanity are possible when both face a shared threat, but mistrust remains deep.

The Drukhari

The Drukhari are descendants of the ancient Aeldari who dwell primarily within the hidden city of Commorragh.

They survive by feeding upon pain, fear, and suffering to delay the spiritual hunger of Slaanesh.

Drukhari raids strike quickly and vanish before meaningful retaliation can arrive.

They seek slaves, specimens, entertainment, wealth, and political advantage.

Their society is divided among Kabals, Wych Cults, Haemonculus Covens, gangs, mercenaries, and ambitious individuals.

Drukhari alliances are possible but dangerous.

A bargain may be honored according to its exact wording while still ending in betrayal, captivity, or humiliation.

The T’au Empire

The T’au are a young and rapidly expanding species united under the philosophy of the Greater Good.

Their empire incorporates several client species and relies heavily on diplomacy, advanced technology, coordinated warfare, and political integration.

T’au forces favor ranged combat, battlesuits, drones, aircraft, and precise battlefield coordination.

They may offer trade, protection, technology, and membership to human populations dissatisfied with Imperial rule.

The Greater Good can provide stability and material improvement, but it also expects obedience to the larger collective.

T’au leaders may use propaganda, surveillance, social pressure, political control, and military force when persuasion fails.

The Kroot

The Kroot are a widespread avian-descended species known for their hunting traditions, mercenary service, adaptability, and ability to absorb useful genetic traits through consuming selected prey.

Kroot society is organized through kindreds led by experienced Shapers.

Although many Kroot serve the T’au Empire, they maintain their own customs, spiritual beliefs, and independent contracts.

Kroot mercenaries may work for humans, xenos, traders, explorers, and even enemies of the T’au when circumstances allow.

They value useful prey, honest contracts, survival, strength, and the long-term health of their kindred.

Kroot can provide a natural foundation for mixed-species adventuring parties.

Orks

Orks are one of the most widespread and destructive species in the galaxy.

They live for conflict, competition, noise, conquest, and physical domination.

Ork societies form around the strongest leaders. When enough Orks gather behind a powerful warlord, their combined momentum can become a Waaagh!: a vast military migration capable of overwhelming worlds and systems.

Orks possess crude-looking but surprisingly effective technology created by Meks, instinctive engineers whose machines function through skill, inherited knowledge, improvisation, and the strange collective psychic influence of Ork belief.

Orks are violent, but not mindless.

They negotiate, trade, hire mercenaries, make temporary agreements, and pursue personal rivalries.

Such agreements usually last only as long as they remain entertaining or useful.

Necrons

The Necrons are an ancient machine species awakening from tomb worlds across the galaxy.

Long ago, they transferred their minds into mechanical bodies and became nearly immortal. In the process, many lost parts of their identity, emotion, or sanity.

Necron society is divided among dynasties ruled by nobles, overlords, and ancient courts.

Their technology can manipulate matter, energy, time, space, and dimensions in ways even the Adeptus Mechanicus struggles to understand.

Not every Necron seeks the same goal.

Some wish to rebuild ancient empires. Others defend their tomb worlds, pursue personal rivalries, recover lost bodies, destroy old enemies, or restore their damaged minds.

A Necron individual may become an enemy, uneasy ally, patron, or player character under unusual circumstances.

Tyranids

The Tyranids are an extragalactic swarm species driven by an immense collective intelligence known as the Hive Mind.

Hive fleets consume biological material from entire worlds and reshape it into new organisms.

Tyranid creatures serve specialized roles as soldiers, hunters, artillery, infiltrators, living ships, and commanders.

They do not negotiate in the way most civilizations understand.

Their arrival transforms war into a struggle for biological survival.

Tyranid encounters may range from isolated organisms and scouting swarms to invasions capable of consuming entire systems.

Genestealer Cults

Genestealer Cults begin when Genestealers infect or influence members of another species.

Across generations, the cult infiltrates families, workplaces, military forces, religious groups, governments, and industrial systems.

Cult members may believe they are preparing for liberation, divine ascension, or revolution.

In reality, their rebellion often prepares the world for a Tyranid hive fleet.

Genestealer Cults are especially dangerous because they can remain hidden for decades.

They combine religious devotion, social grievance, biological corruption, and careful infiltration.

Not every cultist understands the truth of what they serve.

Minor Xenos Powers

The galaxy contains countless lesser-known alien species.

Some control several systems. Others survive aboard stations, hidden worlds, nomadic fleets, or isolated enclaves.

Minor xenos may serve as:

• Traders

• Mercenaries

• Raiders

• Refugees

• Scholars

• Hunters

• Pilgrims

• Explorers

• Criminals

• Political intermediaries

• Guardians of ancient ruins

• Survivors of destroyed civilizations

These species allow Franz to create new cultures without changing the major structure of the setting.

Homebrew xenos should possess believable biology, history, territory, economy, beliefs, and relationships with nearby factions.

Trade and Cooperation

Despite official Imperial doctrine, humans and xenos sometimes cooperate.

This may occur through:

• Rogue Traders

• Inquisitorial operations

• Frontier settlements

• Mercenary contracts

• Smuggling networks

• Shared enemies

• Prisoner exchanges

• Temporary military alliances

• Independent stations

• Secret diplomatic missions

Such cooperation is usually fragile.

Both sides may face punishment from their own authorities. Cultural misunderstandings, old grievances, and conflicting long-term goals can quickly destroy trust.

A temporary alliance should not erase the factions’ differences.

It should create difficult choices about what happens when the immediate threat is gone.

Xenos Player Characters

Playable xenos may include Aeldari, Kroot, T’au, Orks, Necrons, and other approved species.

A xenos character should possess reasons to travel with the party and participate in the campaign.

Possible motivations include:

• Mercenary service

• Exile

• Exploration

• Duty to a distant faction

• Shared survival

• Recovery of a relic

• Revenge

• Prophecy

• Scientific interest

• Political negotiation

• Opposition to Chaos

• Pursuit of a common enemy

Xenos characters may face suspicion, hostility, restricted travel, or attempts at arrest within Imperial territory.

These consequences should create adventures and negotiations rather than automatically excluding the character from play.

Xenos in Play

Xenos civilizations should not appear only as monsters waiting to be fought.

They should possess:

• Goals

• Territory

• Internal factions

• Resources

• Beliefs

• History

• Leaders

• Rivalries

• Civilian populations

• Reasons for conflict

• Reasons for restraint

Some xenos are genuine existential threats.

Others are rivals, neighbors, mercenaries, manipulators, or possible allies.

Franz should preserve cultural differences without making every member of a species identical.

The galaxy is not divided simply between humanity and everyone else.

It is filled with civilizations struggling to survive, expand, remember, conquer, or avoid extinction.