Here, I have attempted to enumerate the list of a wide variety of possible alien races that can exist, with their technologies, home worlds and origins

Races

Humans

Devourers

Greys

Synthetics

Eldrons

Jaunschaue

Ravagers

Sub-Races

Pioneers:Paragon: Syndicate

Psi-Fish:Ki'rKo: The Forgotten

Es'Tec:Phaigour: Astralites

Cyborgs: Androids: Autonom

Eldar: Amazons: Cosmicians

Dvar: Vamana: Baunae

Yautja: Xenomorphs: Orks

Weapons Group

Firearms: Explosives: Biochemical

Telekinetic: Biochemical: Claws-Melee

Laser: Telekinetic: Ataxic

Arc: Explosives: Firearms

Ataxic: Biochemical: Laser

Explosives: Firearms: Laser

Claws-Melee: Biochemical: Firearms

Leader

Galactic Emperor

Hive Mind

Transcendent Council

C.O.R.E

The Omega

Chief Prospector

Chancellor

Home World

Galactic Empire of Milky Way

Hive Domain [Dark Dimension]

The Ascendant Realm

Interlinked Planetary Ream

Celestian Imperium

Frontier Consortium

Jakuza Ufalme

Capital

Earth; Solar System

Mindweb Portal

Quasar Alpha

The 12th Planet; Solar System

Nostra Thule

Sorinus System

Alpha Galaxy

Powers in the World

Warp-Energy

Void-Dark Matter

Celestial-Stardust

Chaos-Dark Energy

Solar System

S3-S5 ; S19-S29

The Dark World

Asteroid Belt (S1); S2; S30-S40

Outer Worlds

Sorinus System

Nostra Thule

Cultech

Voidtech

Psynumbra

Xenoplague

Promethean

Celestian

Deepfreeze

Hyperion

Synthesis

Constituents

Void ; Wormholes ; Rifts

Psionic Rays ; Abyssal Portals

Virus Strains ; Evolution ; Genetics

Chemical Fire ; Laser ; Thermal

Brainwashing, Starlight, Illumination

Frost Equipment, Chilling Laser

Shocked, Electrified, Drained

Creators

Precursors

Abyssal Lords

Omega Mutations

Solarscapers

The Enlightened Ones

Temple of Negative Energy

Forerunners

Damage Type

Magnetic ; Kinetic

Psionic ; Radiation

Organic ; Chemical

Thermal ; Kinetic

Accoustic ; Psionic

Cyrogenic ; Entropic

Entropic ; Electric

Creator Races: Description

Extinct Advanced Race ; Trans dimensional portals

Maleovolent Beings in Abyss

Super Mutated Isolated Ancient Biologists

Long Lost Mutated Race of Humans now coming as Gods for Mundane

Controllers of Internal Energy ; Extremely Focused

Cult of Absolute Zero ; Trans dimensional entities and fanatics

Mummified Race of ancient aliens ; Found in isolated galaxies

Races Description

Human Colonists straight out of Earth in Faster than Light Travel Spaceships

Trans-Dimensional Aliens who feed on Human Brains and Flesh

Long-Buried Seafearing Lords who thrive on "Essence"and spread "Entropic Nothingness"

Half-Human Machines who rebelled off the Human Empire & created an autonomic state

A small band of Inter-Galactic Terraformers alongisde rengenade Human biologists

Stocky humanoid race out of Alpha-Centauri System, Master Smiths and Engineers

Barbaric insectoid race of brutal warmongers who thrive on destruction & chaos

Sub Races Definitions

Paragon are the cybernetically and genetically enhanced breed of the 'aristocrats' of yore, who form the ruling nobility and the administrators, statesmen and politicians.

Pioneers are the tough, hardened explorers, who venture into the deep unknown. They form the core of the sportspersons, soldiers, explorers and pilots.

Syndicate refers to the shadowy group of tradesmen, rogues, criminals and smugglers who do the dirty work for the Imperium. They also house the corrupt & Selfish Merchants amongst their elite.

Psi-Fish are the engimatic, hungry and sparkling fibrous fishes from the "other" dimension. They control minds of othersandthen feed on brains.

Ki'rko are the physically tough, buglike creatures that form the bulk ofthe Devourers. They feed on the flesh and serum.

The Forgotten are the reanimated flesh creatures who feed on the essence and life energy of living beings. Once the leaders, now husks.

Humans

Units

F.A.L.C.O.N (Vanguard Owl)

D.O.G (Vanguard PUG)

Imperial Guard (Paragon Guard)

Astro Trooper (Syndicate Indentured)

Technologist (Vanguard Engineer)

C.L.A.W (Spy + Guild Assassin)

Gunship (Vanguard Gunship)

Veliobike (Assault Bike)

Overseer Subugator (Syndicate Subjugator)

Cryogenic Marine (Vanguard Trooper+Ice Attacks)

Recon Jumper (Spacer Druggie)

Aegis Tank (AEGIS Tank)

Poseidon Walker (W.A.L.K.E.R Planetfall + Warhammer Marine)

V.A.L.K.Y.R.I.E (Mechanical Wings + Laser Sword + SPARTAN Armour)

W.O.L.F Fighting Vehicle (Warhammer Imperium Land Speeder + Burrowing)

R.A.P.T.O.R (Stormraven Warhammer 40K + F-22 Raptor)

Zenith Hovercraft (AoW: Planetfall Zenith)

Drone Fortress (Vanguard Drone Carrier)

Suits

Nanosuit (C.R.Y.S.I.S), Draco Fly

S.P.A.R.T.A.N (H.A.L.O)

Jedi Warsuit (Star Wars)

F.A.N.A.T.I.C (Iron-Man Original)

Aeroplanes & Spaceships

Velociraptor Z-212, GAUSS, J-910

Monogram

Quinjet

Moonraker

Orion Clipper

Centauri-802

Sub-Cultures

Imperials Domination Culture

Proleterians Exploitation Culture

Journey-Men Exploration Culture

Vanguard Defense culture

Full Forms

F.A.L.C.O.N (Fusioned Alacratic Catatonic Operating Nobot)

C.L.A.W (Cloaking Laser Equipped Agent of Whisper)

Devourers

Units

Chrysalis (Psi-Fish Chrysalis)

Psi-Hunter (Psi Fish Hunter)

Siren (Psi fish Siren)

Shackled (Frenzied Ki'rko)

Abyssian (Kirko Abyssian + Flood Creature HALO)

Bombard (Shadow Demon Bombard AoW 2 SM)

Stag Mount (Klackon Stag Mount)

Medusa (Psi-Fish Medusa)

Ravenous

Hidden

Crystal Spawn

Siren

Barrager

Harvester

Skimmer

Desolate

Shattered Soul

Death Eater

Suits

Emerald Scales

A.N.A.R.C.H.O.I.D

Sanctum Robe

Transcendent Armor

Aeroplanes & Spaceships

Sub-Cultures

Ki'rko Worker Class

Forgotten Elite Class

Psi-Fish Spiritual Class

Parasitic Defender Class

Full Forms

Weapon Types

Firearms

Laser

Bombs

Swords

Claws

Spits

Radiation

Waves

Damage

Magnetic

Weakens molecular bonding ; Makes your body pastelike and weak

Kinetic

staggered, bloody, death

Chemical

acidified, mutated, rotten

Entropic

life essence gone, inanimate husk

Electric

shocked, stunned, electrified

Psionic

mindless, mind controlled, brain dead

Thermal

burned, charred, promethean martyr

Organic

poisoned or diseased, mutated

Acoustic

Deaf, concussed, death

Cyrogenic

Frozen, ice

Radiation

Sickness, Radiation Burns, Cancer, Mental dizziness

Cultech-Constituents

Gravitonium

Levitation ; Wormholes ; Rifts ; Implosion

Psynumbra

Psionic Rays ; Abyssal Portals ; Collars ; Brain Devices

Xenoplague

Virus Strains ; Evolution ; Infection ; Genetic Manipulation

Promethean

Chemical Fire ; Laser ; Thermal Weaponry ; Thermal Armour

Celestian

Brainwashing, Starlight, Illumination, Qi-Prana Power

Deepfreeze

Frozen, Frost, Ice Armour, Chilling Laser, Anti-Ageing

Hyperion

Shocked, Electrified, Drained, Animate Husks

Magnetika

Electric currents, Magnetic fields, Illusion, Cloaking

X-tech

Spacetime distortion, Acceleration, Anti-matter bomb

Quanta

Reality Warp, Consicousness Altering, Synchronicity, Chaos

Greys

Units

Drained Husk

Siphoner

Quintessence Luminosity

Hulking Serapion

Yahg Guard

Spectral Koi'lur

S.L.V.R.D Robot

Covenant Shooter

Neuro-Disruptor

Ataxic Bomber

Quantum Anamoly

Reality Warper

Temporal Displacer

Sacred Levithan

Astral Lord

All-Knower

Celestial Watcher

Ognessta Machine

Adeptus Machincus

Primal Titan

Eternal Judge

Ravagers

Units

Predatory Worm

Xenomorph Baby

Planetary Races: - Devourers, Synthetics, Humans, Eldrons, Jaunschaue, Greys, Ravagers

Technological Natives: - Hestaputr, Boreans, Lutumisians, Bulrathi, Alkari, Darlok,

Anachronistic Natives

Wildlife

Spaceflight Achieved :- Yes (Solar System Wide), Yes (Nearby Stars), Yes (FFL), No

Physical Appearance :-

Nourishment Type :- Mineral Based, Bacteria/Vegetarian, Vegetarian Normal, Omnivorous, Non-Vegetarian Cooked, Non-Veg Raw

Genetic Capability :- Gravity Effect Magnified/Lessened ; Natural Camouflage, Radiating Energy, Stronger/Weaker Psionics,

Mental Affinity :- Mercantile, Decadent, Xenophobic, Warlike, Deceptive, Enlightened, Analytical, Emotional, Cultured, Xenophilic

Favorite Technologies :-

Cosmic Characterstics :- Assimilate Hosts ; Symbiosis ; Drain Essence ; Drain Organic Materials

Resources :- Extractable, Productionable, Forgable, Designable

Energy Batteries :-

Fuel :- Grade 1,2,3 [Low Energy, High Pollution], [Medium, Medium], [High, High]

Common Minerals :- Iron, Aluminum, Copper

Rare Metals :- Diamond, Neodymium, Lanthanum, Cerium, Praseodymium, Gadolinium, Yttrium, terbium, europium, Nuclear

Alloys & Polymers :- Polythene, Bioplastics, Self Healing Polymers, Reactive Polymers, Amorphous Metals, Artifical Silk

Rare Prototypical Elements:- Graphene, Nanomaterials, Metamaterials, Transparent Alumina, Metal Foam,

Organic Materials/Tissues: - Molecular Superglue,

Uses:- Normal, Advanced, Complex

Building Construction, Fuel Transport, Vehicles and Weapons, Household Appliances, Electricity Transmission

Properties:-

Tensile Strength, Malleability, Ductility, Transparency, Weight,

Humanoid: - Human, Hestaputr, Boreans, Lutumisians, Elfeyins

Avian :- Alkari, Crowfoi, Storkshae, Eaglens, Sparrzeins,

Molluscoid :-Eptils, He Alisk, Maians, Ykraitia [ocotopus, snail, fishoids]

Lithoid :- Golonid, Calacoids, Ltanian, Devansfore [rocks, crystals, mineral based]

Fungoid :- Sychlosi, Taalorio, Xchag, [mold, mushrooms, toadstools, slime]

Arthropod :-Cancorpora, Zorbineans, Uan 'sh, Zorgoids [beetles, centipedes]

Mammalian :- Bulrathi, Ybyotam, Pemalosia, Irororom [cat, dog, horse, elephant]

Plantoid :- Ebrocrust, Cologri [algae, flowers, trees, bushes, leaves]

Reptilian :- Jophet, Snakemer [snakes, lizards, komodos, crocs, chameleons]

Shapeshifting :- Darlok [black], foreshuns [monocolored, neon colors]

Synthetics :- Cyborgs, Androids, Autonom

Amphiboids; - Axolotle, salamnder, frog, worm

Firearms - Arc

Explosives - Psychogenic

Laser - Radiative

Muscular Enhancement - Blades/Hammers

Claw/Bone Enhancement - Plasma Weapons - Particle Beam Weapons

Synthetics

1. Androids [Machine with Tissue Exterior, Artificial Intelligence] [Diplomats, White Collar]

2. Autonom [Autonomous Robots] [Blue collar, Defense]

3. Cyborgs [Part Men Part Machine] [Adventurers, Generals, Business Leaders]

4. Bionics [Reconstructed Man with consciousness transferred to hard disk] [Scientists, Developers, Spiritual Guides]

5. Cryonics [Frozen - Preserved Skeletons with Super-Brains (Brain Bridging] [Leaders, Rulers, Kings]

Human Empire: - Democracy, Freedom, Apathy, Selfish

C.O.R.E: - Technological Supremacy, Efficiency, Ruthless, Tyrannical

The Hive: - Obedient, Industrious, Xenophobic, Darwinist

Mining Consortia: - Orderly, Xenophilic, Wasteful, Greedy

Covenant Prudentia: - Enlightened, Knowledgeable, Elitist, Unstable

Venandi Ascartes: - Tactical, Virile, Brutal, Chaotic

Chrystaline Oligarchy: - Cultural, Artistic, Decadent, Maraudery

The Shadowy Fleets: - Cunning, Adaptable, Vengful, Repressive

Normal Human ; Synthesis

Blue Skinned ; Multiple Limbs ; Disjointed Brain :- Devyaux ;- Celestian

Pointed Ears, Light but Strong; Fast Movement; :- Eldrons ;- Xenoplague

Adaptive ; Heat Reflective ; Stretchable :- Hestputr ;- Promethean

Adaptive ; Heat Absorbance ; Hardness Variation :- Boreans ;- Cyrogenics

SubRaces: -

1. Orientals - Negroids - Nordics - Aryans - Aboriginals - Austronesians - Americans

1. Formeru (Three eyes) - Angani (Two Palms with each hand/leg)-Mandca (Tails, one nose on the back & Multiple Sex Organs)-Orloralh (Horns at shoulders/4 ears)

(Navy Blue, Sharp features) - (Light Blue, Short features) - (Ocean Blue (Greenish), Elongated but snub) - Slate (Greyish, soft but shapely)

Heightened vision detection, Highly dexterous/multi-tasker, Stronger, Virile and Smell better, Heightened listening & harder body

1. Oriansy (High Elf) - Kherelli (Dark Elf) - Eosapien (Wood Elf, Greenish-Brown) - Tyranus (Sea Elf, Azure)

Tallest, Can naturally throw energy bolts - Strongest, Can absord radiation, - Most agile, Can project qi energy, - Lightest, Can swim underwater for very long

1. Liquid Lava skin, Can shoot lava off their tips, vulnerable to magnetic fields - Rock hard skin, highly durable but weak to gravity - normal but fire resistant skin, weak to physical blows

1. Ice hard skin, Watery skin - normal ice resistant skin

Mutants

Bone Based

Muscle Based

Psychic Based

Optic-Based

Energy Harnessing

Mammalian

Bovine :- Ingest grass, survive longer, slow but strong, resistant to cosmic rays, electric attacks, workers and gunners

Feline :- ingest meat, faster and tough, camouflage, handle laser and gravitonium weapons, resistant to xenoplague

Canine :- omnivorous, light & fast, martial arts knowledge, handle biochemical weapons, resistant to magnetic fields

Pachyderm :- slowest but strongest, wear heavy armour, handle carbon swords and electric halberds, resistant to quantum tech

Avian

Alkari :- Parrot/Owl famiy :- best leaders/scientists

Crofoi :- Crow /Raven family :- best spies and thieves

Storshae:- Stork/Geese family :- best productive workers

Eaglenz:- Eagle/Vulture family :- best raiders & pilots

Sparzzey: - Sparrow family :- best farmers

Insectoid

Mollusc :- Eptils [Snails, Clam], Yig Alisk [Octopus]

Arthropoid :- Cancorpora [Beetles], Uan 'sh [Centipedes, Mosquitoes], Zorgoids [Crabs]

Amphibians :- Ians Oricor [Frogs],

Fishoids :- Zorbineans [piranha], Ualishak [normal], Xamitesso [shark]

Greys

Phaigour:- San'Shyuum (Halo); Tentacles; Direct inhalation of energy

Astralites:- Typical Grey Alien; Legs ;

Es'Teq:- Salarians (Mass Effect); Gooey Liquid

Aiu'Novanns:- Duros (Star Wars) ; Fossorial legs

Jaunschae

The Jaunschae are the tribe of human like stocky antromoprhs from the Solar System of 'Teraxia' 2,500 light years in the direction of the Galactic center of the Milky Way.

They are stout, much more resistant to natural and elemental hardships as well as powerful engineers, however with comparatively frailer psychic brain strength.

Synthetics

The Race of the archetypal 'Cyborgs', Synthetics are a fusion of flesh and machine, powered by a combination of human brain and the AI. They are a direct offshoot of the Human civilization, broken off at a certain year somewhere in the 'Hedonistic Age', by rogue AI and idealistic Scientists. Their society works in a different fashion to humans and don't have space for several 'emotional' entertainments and weaknesses of the humans.

Their primary tribe is the 'Cyborgs', humans with missing limbs compensated by machinist parts, oftentimes the brain as well, by a realistic AI. Cyborgs were the ones who led the rebellion known as the Great Fractionis, from the primary human empire and expanded into the great unknown wilderness of the 'Scientae Galactorlis'. the sector of planets that were uninhabitable, including asteroids and other bodies.

Androids were first created by the Mad Scientist 'Klauraxe', a master in genetic and tissue sciences, for the purpose of having human like slaves in vicinity. Androids soon out grew their purpose and created their own place in society. They often act as diplomats, spies and other secretive agents.

The Last faction amongst the Synthetics is the 'Autonom'. the Machinist components powered by super intelligent sentience. Lowest of the Autonom function like 'Internet of Things' gadgets while the highest ones develop human like emotions alongside a monstrous, gargantuan intelligence.

Their Conflagration is composed of 15 planets, out of which are completely inhospitable to humans. They share boundaries with the human empire, and a tenuous peace after a century of nerve wracking war. A total of 2 separate solar systems compose their entire family and despite their relatively smaller size, they have better tactical combat and more resilient weaponry to face higher numbers easily.

Humans

The Vanilla race, Humans are the advanced (give r take 150-200 years from present) version of ourselves. They have conquered several planets in the solar system and have even established small colonies on the outer planetary bodies that are present outside the solar system. They are divided into mainly 3 'castes' known as 'Pioneers','Paragons' and 'Syndicate;.

'Pioneers are the tough, hardened explorers, who venture into the deep unknown. They form the core of the sportspersons, soldiers, explorers and pilots.

Paragon are the cybernetically and genetically enhanced breed of the 'aristocrats' of yore, who form the ruling nobility and the administrators, statesmen and politicians.

Syndicate refers to the shadowy group of tradesmen, rogues, criminals and smugglers who do the dirty work for the Imperium. They also house the corrupt & Selfish Merchants amongst their elite.

Their Empire is known as the "Hominum Imperium" aka "The Imperium of Man" ruled by the "Conclave of the Seven", a group of seven Dukes that rule seven major planets of the entire Imperium.

Capital is a small obscure sea-locked city known as "Pompeius Arcanum" on Earth.

Total planets in the Imperium are 27, housed in 4 major Solar Systems.

Their major technical advances are in Artificial Intelligence, Materials Science and Quatnum Physics

Sci Fi Terms:-

Quantum Regulator

Bio dome Faclity

Positron Tecnology

Xenoplague Pustules

Spaceship Maintenance Bay

The Dvar Forge City

Heavy Weapons Factory

Celestian Archive

Starlight Observatory

Celestian Enlightenment

Pure Fountainhead Hearth

Imperial Biodome Compound

Teleport Station

Targeting Array

Advanced Relay Architecture

Global Information Control

Virtual Hospitality Systems

Clinical Immortality

Transcendence

Ecological Engineering

Planetary Economics

Environmental Economics

Matter Transmission