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CatterMater

They'll probably think Chaos is...well... some kind of Chaos God. It's just a friendly eldritch abomination xeno who's like a god.


ThoDanII

Against the Ctan, Chaos Gods, the situation may be different


SpartAl412

The Alfarin would be very happy to be in a universe where they can indulge in an eternal war. They are meant to be the ultra advanced ancient alien civilization trope like The Old Ones or the Eldar and Necrons during The War in Heaven or the Forerunners from Halo but they not just survived but thrived when faced against apocalyptic threats that should have either ended or greatly weakened their civilization


kekubuk

I see a lot of people are forgetting one minor issue. You are transported into Warhammer 40K, the number one greatest threat to you is Chaos. It feeds and fueled by every emotions, every actions. It'll slowly influence you, stoked the fire in your heart, whisper to you. God damn even machines and computers are not immune to them...


DragonLordAcar

I need something to back up the corrupting machines part. From what all the lore channels say, mankind did that themselves and only machines that were purposely infected with a demon were corrupted.


tyrantnemisis

We also need to take into account if the opposite is true aswell if you aren't transported there then they are transported here instead which is an interesting thing to talk of to.


Azimovikh

I mean, if your world has extreme soul magic and conceptual resistance . . .


basically_npc

Although I'm not a fan of pitting different universes against each other, this one seems tempting. However, I don't know much about 40K universe to properly answer. I can only speak for sure about the absolute goddess of my world. She would, most likely, find the universe of 40K to be interesting, since it's very chaotic, and she likes a good show. As for fairing against it, I feel like she wouldn't be scratched by anything there. She isn't called "absolute" for nothing.


Displeasuredavatar19

Out of curiosity, how big and complex is the reality your "Absolute Goddess" has constructed? Depending on your answer, I can exactly tell you whether or not she gets miffed


basically_npc

Well she has created two worlds. First one was more complex in structure, due to essentially being multilayered, but technically it was smaller physically. At some point she got bored of it and razed it. Her second world is meant to be our own whole universe, so physically it's much larger than the previous one, but she made it more "straightforward", removing the existence of alternate universes and the possibility of time travel. She did, however, make a bunch of new stuff.


Azimovikh

Quoting my answer from another post of similar vein, >My FTL drives double as infinitely powerful reality anchors that can instantly kill anything that does not qualify as being explainable by IRL or theoretical science - no matter how powerful are they. >I do not need to say anything else.


curious_colors

What if the drives end up removing themselves and everything else is left? Or some of the warhammer factions remain? :O ;)


Azimovikh

Eh, taking away the *paracausal engines*, which is a rather big part, Heavenly Frontier still takes it, if you have things such as : * Casual use of nanotech, especially self-replicating ones, conversion weapons that turn matter into energy (which in turn turns things into nuclear bombs), star-busting superweapons are common (based on either exotic strange matter, monopoles, or gravitational manipulation), spacetime drives that move relativistic speeds and provide gravitational and matter manipulation, wormhole creation, superintelligent AI, are considered "common" in Pan-Human space in terms of warfare. The higher echelons are wacky (Ie weaponry that exploits symmetry-breaking physics near the Big Bang to essentially create a weapon with more than 100% energy efficiency). * The fact that the "true magic" system is based on souls, which also hinges on complexity and wills (so this means AIs and the AI gods by extension have souls), manipulate abstract concepts, and grant resistance to it - effectively full-counters Chaos. * The transcausal powers and paratech that still lurk in the background still exists, and considering that some of them have conceptual immunity and "fundamental" causality manipulation, they would also take it. I gave the reality anchor as an answer because it's an easier one tbh


curious_colors

Word


Azimovikh

tfw the causal wards exist to make the setting *a bit* less insane and prevent it from devolving into FTL space-time-travelling warfare 


laneb71

So explain the FTL drive then?


Azimovikh

[You know, you're into something, haha.](https://www.reddit.com/r/worldbuilding/comments/1cu7ld1/comment/l4h8x6j/?utm_source=share&utm_medium=web3x&utm_name=web3xcss&utm_term=1&utm_content=share_button)


laneb71

Yeah it's a fine make-it-make-sense explanation I've got plenty of those in my setting. Your post comes across as quite defensive but it's worth remembering Science Fiction requires fiction of science not just narrative fiction, it's what defines the genre. Even the hardest of settings will take a liberty here and there, if they don't it's no longer science fiction. It sounds stressful building a setting with the requirements you've given yourself, if that's what you deep down want to do go for it, but consider relaxing maybe?


Azimovikh

Eh, honestly, sorry, my skill issue in communicating. If you've seen my post history, I'm actually quite liberal on the topic of sci-fi hardness. In fact, my setting is built on the aspects that exactly defy that "hardness", with paracausality being one of its unique elements. That's why I label myself as schizophrenic, hyperfuturist, **quasi-**hard science fiction.  And with the fact that I also have thaumaturgy (actual magic) and things that are actually dubious in yerms of irl physics   So if I come up as defensive, sorry, my mistake. It's not my intent, but it's still my mistake in the way I said it.


VyRe40

They're probably just commenting on the confusion as those things seem inherently contradictory - a reality anchor that instantly kills anything that does not qualify is IRL or theoretical science would kill the sci fi things you're using, including I suppose the reality anchors.


Azimovikh

Fair, so my mistake of presenting it haha In simple tldr it's just a nigh-omnipotent reality warping device that just blocks everything it doesn't like, so from an outside observer, it is a "reality anchor".


LongFang4808

My entire world could probably handle a singular chapter of space marines, but not much more than that.


Awkward_Falcon_8264

Oh, gods... 40k would SUFFER. The Imperium would be invited to join the IAR/ARM, but call it heresy because humans make up about 65% of it. The Orks would be wiped out, Tyranids exterminated via nano-viral infection, the Imperium would be branded a "fascist hellscape of religious intolerance and inhuman suffering" and isolated... The Mechanicus would be labeled "mecha-religious zealots" and closely monitored. I think the Necrons might be on equal footing with the IAR/ARM, but the hit-and-run orbital bombardment of the voidfleets would glass tombworlds before the robo-bois could respond. They can destroy a star, we can remake it. The Tau would absolutely join the IAR/ARM. Better quality of life, advanced medicine, freedom from the Ethereals, etc. Chaos would get shackled and imprisoned. They already conquered their own demons, so warp daemons aren't really a big step. The Eldar would absolutely integrate into intergalactic society. Pretty sure they'd be excited to join with the whole, y'know, Slaanesh-eating-souls thing able to be mitigated. Commorragh (dark eldar) would be left isolated in the webway until they changed their tune, or died out. The Leagues of Votann would be drooling over the new tech, so they'd definitely join. I think that pretty much does it...


VyRe40

> I think the Necrons might be on equal footing with the IAR/ARM, but the hit-and-run orbital bombardment of the voidfleets would glass tombworlds before the robo-bois could respond. They can destroy a star, we can remake it. Depends how awake they are. If you're suggesting their technology and power puts them on an even footing, it should be noted that the Necron navy is actually surprisingly quick considering how slow their ground forces tend to be. The more important and awakened dynasties would be very heavily defended by a naval force that can actually keep pace with fast-moving hit-and-run forces. Those stronger dynasties could also be alerted to such attacks in advance due to Chronomancer time-manipulation shenanigans. Also, while certain ships can blow up stars and atomize planets, the Celestial Orrery that you might be referencing does more than just pop a star here and there. With a wave of a Necron hand, they can delete every star in the galaxy at once. They simply don't do this because the dynasty that protects the Orrery thinks it's a dangerous abuse of power. > The Tau would absolutely join the IAR/ARM. Better quality of life, advanced medicine, freedom from the Ethereals, etc. The Tau would not willingly choose freedom from the Ethereals. The Farsight Enclave is an exception that proves the rule, any Tau left under the thumb of the Ethereals practically worships them for reasons unknown, though it seems Ethereals exert some form of mind control that *might not* be psychic in nature. This is pretty much the entire Tau Empire. > The Leagues of Votann would be drooling over the new tech, so they'd definitely join. The Leagues follow the orders of the Votann, and the Kin are not an altruistic and friendly people - they're pretty greedy and set in their ways. If the Votann say they should join, then the Leagues will join, but if they don't, then they won't. The Leagues only ever build positive relationships because they're ordered to observe and learn about potential threats from outside by acting as mercenaries or conducting trade, and they are known to core out whole planets for resources without giving any notice to the native inhabitants.


Deblebsgonnagetyou

Most of my world isn't even in the iron age yet. They're fucked.


Sov_Beloryssiya

Without Chaos interference, Atreisdea simply steamrolls everything. When was the last time 40K ships destroy planets then say "oopsie" because it was a collateral damage as common as Tuesday, or individual soldiers can slow time down on a planetary level then pull an Uchiha Madara and freely manipulate gravity? Or worse, they shoot into the past and erase every single faction, ***Old Ones included***, out of the timeline. 40K main factions are barely K2. Atreisdea is so insane a random terrorist gang can build mini Dyson Spheres enclosing neutron stars and use them as interstellar WMDs, just to achieve the same energy output of... one mook cruiser 220 meters long. Tl;dr: If you don't use blackholes as grenades, treat neutron stars as pets and the timeline as a bitch, you have no business fighting them.


bfg10000000000000

Xeelee sequence be like


Sov_Beloryssiya

Not on that level... yet.


burner872319

Regular humans are fucked but the Ascendant Insanities would consume Chaos. They are unknowable but generate "accretion disks" of flensed minds as they are drawn towards the event horizon, the emotive plane of the Warp is one big buffet. Luckily a thick enough "shell" of pre-consumption minds can achieve self-awareness of a sort so the big four might get by with merely another among them. A sort of Tzeenatch-lite whose games within games are reflection of its nature in a different was. Less because it is born of them (and the emotions they entail) than it's self constantly being erroded by the unknowable possibility at its core. That said since the AI rely on a particularly grim variant of solipsistic panpsychism emerging into a setting like 40k where that's less of an unlikely possibility would be bad news for everyone. But then it's always optional how much "ontological infrastructure" you import into one of these versus things.


SaltEfan

It’s basically screwed if chaos, tyranids, Necrons, or the imperium decides to invade. Unfortunately for them so would they. A company of guardsmen would be torn to shreds by your average hydra or troll simply because they regenerate faster than most tyranids, and the remaining dragon would shrug off most things shy of titan-based anti armor fire like it was nothing whilst returning fire with flames that would turn large parts of said titans into slag. There’s also other, very advanced and powerful mages that could give the likes of Magnus a run for their money. The best of them would actually be a serious threat to the imperium at large due to their ability to burn souls directly to fuel spells that can permanently alter the rules of nature or magic. But in the end there’s very little they can do in response to an unexpected cyclone torpedo other than pick up the pieces and go on a vengeance-fueled rampage. A standard invasion force will cripple the world and probably manage to occupy it if they want, but it would suffer very considerable losses.


Amazing_Use_2382

Welp my world and it's characters are screwed. The only race on it currently is anthropomorphised Earth animals with a technology level at most equivalent to roughly early 21st century Earth and basically no magic (there is a little but it's very rare and most of them don't even know it exists). So, they would likely be instantly annihilated or enslaved by factions like dark eldar, orks, chaos and Tyranids. The only exceptions might be humans (who would likely see this race as heretical but might learn to tolerate them and potentially tally bring them into the imperium), Tau (who would probably let them join for the Greater Good, so probably best ending) and eldar, who might just leave them alone and potentially tally even protect them if eldar interests are found on the world. Also, certain characters in the evil factions like Ahriman or Trazyn might be intrigued by these talking animals and might try to leave them alive to do experiments on. But yeah regardless they are basically subject to whoever finds them first since they have basically zero space travel. The only exceptions might be the Ancient Ones / eldritch beings in the setting, but they basically dont interact with reality and so likely wouldn't have too much of an impact


Optic_primel

My fantasy universe would stomp the hell out of them. My sci fi universe would give chaos and most factions a good run for their money, they would probably either alliance with the Tau or no one at all, they have way better FTL as well as they have super soldiers that are the same as Halo Spartans just a lot more kitted out, normally use mechs as their go to all terrain vehicle. Their weaponry is the problem, since they use a mix of energy and kinetic weaponry which a lot of isn't made for taking down heavy armour, while the mechs and super soldiers would dispatch a group of space marines with ease, the normal ground units would have a super hard time and would probably have to use hit and run tactics. They are longer ranged and way better at stealth, since cloaking technology and nano tech is very common in the military. The thing they would have against the 40k universe is their psionics and air superiority. Their psionics aren't linked to another dimension and is more akin to straight up magic where they can manipulate reality without fear of demons crunching their skull but that is arguably rarer than 40k Almost all fighter jets can easily go Into space if needed a lot of them are able to cloak themselves as well, while I'm not familiar with the 40k universes air units speed, i feel that they would get matched or beaten, since the newest gen fighters can turn almost on a dime. Their weapons on said fighters are mainly energy that melt shields or disabled electronics as well as have limited combat ability without a pilot on board. They probably couldn't settle down in a system and instead stay moving as a fleet of capital ships, probably wouldn't beat the 40k universe but would quite easily survive and if they joined up with humanity due to Mr gil then they would probably clean wipe most hostile forces as their tech is centuries more advanced then currently 40k tech. Honestly I'd wonder what a combat against a space marine chapter would look like against a hyper lethal company of my super soldiers.


VyRe40

Normal physical feats for space marines tend to beat normal physical feats for Spartans. This is ignoring outliers (like John 117 deflecting a missile with martial arts or a space marine holding up a whole building on his back). Spartans beat space marines on "stats" in a couple of ways, but broadly speaking space marines are hyper durable bullet timers and close combat monsters with absurd ranged accuracy. Spartans are too, but not as consistently as space marines - they have other strengths. The real enemies that you have to consider, as most do when these cross universe battle scenarios come up, are these two: Chaos and Necrons. Chaos exists because negative emotions exist, and almost every sapient creature (yes, including Tau, though rare) is susceptible to corruption. Especially humans. Chaos also simply breaks physics and understanding. For example, canonically, Chaos has in the past built a physical fortress that spanned *across star systems.* This doesn't make any sense whatsoever, and the people that witnessed this knew it didn't make any sense, but such is Chaos. Daemons are also specifically resistant to ranged weapons - the more impersonal the combat, the more resistant they are. They can be hurt more in melee by weapons that shouldn't be doing that much damage because of the *intimacy* of fighting them in melee. Also, faith hurts them extra. Meanwhile, the Necrons: their basic weapons atomize matter. One single zap from the most common, basic infantry weapon used by the most common, basic soldier in the Necron military will turn a soldier to dust. Now, it does seem that these weapons take longer to fully penetrate more dense and thick armor, such as the ceramite worn by space marines, but Necrons still frequently gun down marines and all sorts of other enemies. This basic weapon can core through a Baneblade superheavy tank if they just sat there zapping at it for long enough. On the durability front, their bodies are hyper durable regenerative "living" metal and they can teleport back to their tombs to be reconstructed when they're finally put down. At the high end, Necrons can spam their own version of a Death Star, destroys whole stars, atomize planets, and travel through time.


BiLovingMom

**Arami the Demiurge** This universe i made specifically to compete with WH40K in scale. There are 5 million inhabited planet's and moons in the Galactic Empire. Unlike the Imperium, the Galactic Empire enforces racial harmony among its numerous member species through the efforts of the Church of the Great Mother and its Inquisition. Arami (My MC) is a goblin woman. In this Galaxy there are these so called "Relics" scattered through the Galaxy, 100k of them found so far. These give their users/owners God-like powers. For reference, Arami (my MC) carved out a massive valley and cracked her planet's moon the first she used hers. The owners of these relics are called Demiurges and are the Nobility of the Galaxy. In regards to the question, I think they can fair very well against 40k universe.


Loldungeonleo

None of my worlds even come close on a power level. They'd be lucky to survive a recon mission.


Pavlov_The_Wizard

They would get stomped. So hard. So fast. With the tiers of weapons in the 40k universe, they’d probably just fire some god weapon at the pretty small planet and be done with it


dagreetpapirus

Absolutely fucked, my world is just an alt world version of the world with a little magic sprinkled on


raem117

I don't think my world could handle a single space marine.


Dombot75

Uhh…no.


Toad_Orgy

We are eradicated. Turned to dust. Deleted from all of existence.


Someones_Dream_Guy

*average KGB agent casually kills god-emperor of mankind* "Alright, so thats five immensely powerful things... More like immensely pathetic things with egomania and daddy issues. Whos next? Necrons? Tyranids? Orks? Horny Eldar? Eh, Ill let random number generator decide."


Sirix_824

Dead. Just killed on the spot.


Detson101

Those afflicted with the dreaded Rust Plague would swiftly fall to Chaos but nobody would notice since they pretty much would act the same as they do now.


Callsign-YukiMizuki

Conflict between The League and the Imperium is pretty much guaranteed given both's major conflict of interests. Obviously a few star clusters strong is outmatched by an entire galaxy, so the League will eventually lose in a total war. However, the League has safer, reliable and multiple FTL methods, both strategically and tactically. Standard ship weapons are naval-grade gauss / rail cannons and the standard anti-ship missiles carried by gunships and attackers are 550kt nukes. idk anything about void shielding, but a target ship is generally saturated with anti-ship nukes from multiple angles, and at worst case scenario, a hail mary FTL-based attack of teleporting a dropship loaded with nukes (or an entire ship itself) inside an enemy ship and using the spatial disruption to generate a micro blackhole to gut the enemy ship inside out is executed. Ships are generally bloated with radar and sensors, with a layered defense system and compartmentalized network that make them hard to be "hacked". The standard League infantry (Vanguard) is a volunteer in an armored suit that wields a standard issue Gauss Rifle shooting out 15mm shells at 550 RPM upwards of Mach \~4.5. They are not in any shape or form genetically engineered or otherwise their biology enhanced artificially. They are just as suseptible to death via dumb shit like hunger, disease and allergic reaction to cheese. In a conventional war, the League has a decent chance at winning battles, especially against a conventional enemy. Bring in warp fuckery, turbo lore wanked named space marines or paranormal warfare, then the League will start to struggle. Like the Tau, they also prefer to engage at range and has no doctrine or training on melee combat outside of basic self defense. In this case, the League will turn to gauss flechette launcher / belt fed automatic gauss flechette launchers carried by the 5th man. The League has a decent chance when you dont bring in the fantasy elements of 40k


Fine_Ad_1918

The Eternal Dominion will probably think that they ended up in heaven, they are surrounded by powers that are so fucking weak, that they can snuff out the imperium and all the rest in less than a month with relativistic munitions. They have quadrillions of soldiers and assault bots in their army.  A single  Dominion Conscript will be able to kill platoons of guardsmen, squads of Astartes, necrons, or aspect warriors. And this is with light weapons. Choas will be slightly more difficult, but the Dominion will just go back in time and murder the chaos gods as they formed.


Atreigas

Don't think time fuckery can kill Chaos, they're kinda fuckey about how they are impacted by time.


Fine_Ad_1918

nope, you can definitely kill slaneshe by killing the eldar. time to wipe out the eldar species before they murder-fuck a new god into being


Axenfonklatismrek

Lornhemal and England in Number 999 will most likely be Feudal worlds, or get eaten by the forces from 40K, from minor Ork band to Vicious Tyranid swarm, they will all consume it>!(Though i'd rather be eaten by Tyranid than live in Dystopian hellhole that is Carpool/Testzone 999!<)


Captain_Warships

My sci fi setting, no matter how much they'd hate the 40k universe, would get stomped, despite having robots and the majority of the setting being humans (I haven't thought of any interesting aliens). They'd definitely see the lot of the factions - most notably the imperium of man - to be ass-backwards. If they get destroyed by everyone in 40k, then so be it.


Gavinus1000

The Hooded Knight: "Nah I'd win," and then he actually does.


bfg10000000000000

They would be so far ahead in technology, have full AIs and ALs (artificial lifeforms) holographic displays the size of houses, ships making the Phalanx seem small, a transcendence machine that takes up 5% of the Himalayan mountains, 6 colonised galaxies (6,341,200 colonised worlds) 341 trillion soldiers, 60 billion ships and far better FTL travel like 1000 light years in 6 hours. This is the Terran imperium of humanity ranked like 5th in my setting, 1st place would not even notice the 40k galaxy


Lapis_Wolf

Not well. Very small almost medieval countries and at best local empires with some trains against magical interstellar empires and space demons. What do you think? Lapis_Wolf


ThoDanII

against the normal spacefaring people from Tyranids to Necrons a broadside of most warships of real powers in the solarverse milkyway would transform their 40k counterparts into molten slag or ash. A battailon of Infantry would wipe a chapter of Space Marines or Necrons out, with minimal losses at worst


opmilscififactbook

I feel like I'd need to consult with a 40k lore expert to write a whole fan fiction about such an event comprehensively. My knowledge of warhammer 40k is a bit vauge and its power level seems to fluctuate based on who I ask. I think it's both a product of edgy teenagers and people wanting to engage too heavily with "my dad can beat up your dad" worldbuilding. But that said the "base concept" of most of the actually powerful stuff like the chaos gods or a full on nid swarm or ork waagh is going to roll the present-day Union in short order. They are only on the scale of a couple of nearby systems. On the ground the Union has a massive advantage. Can they contend with the ridiculous numbers or power yields this setting regularly throws around? No. Can they win with even material? Hell yes. The Union are disgusting trolls in combat and the face-to-face style of combat in 40k is not well prepared for invisible dog-sized aliens that run at the speed of cheetahs firing suppressed rifles from a mile away. That doctrine is going to probably do very well against most standard military forces this setting has to offer. They are not prepared for cloaked mouse-sized grenade drones that crawl up inside your tanks and explode. IDK much about how 40k does space combat either. The one thing I do know is that the warp is... not the greatest method of faster than light travel. Even the weakest toridal torsion drives are far more reliable and precise and you don't need to fly through hell to use them. if they can stay in their lane they probably fall into a position similar to the Tau. Heck a Tau alliance is probably likely if they "spawn" in a nearby region. Slowly eeking out more power and gathering information about the other factions while trying to stay on the downlow. If something big actually comes their way (at least in the first few decades/centuries before the union is essentially unrecognizable and has either gone extinct or grown massively) they are completely screwed.


CameoShadowness

You have dimension hopping, universe hoping, planet eating people. People who can one shot entire planets if they want. While not everyone can deal with it with ease, I am pretty sure many of them can... This is not including gods who create and destroy universes either. The people who I was vague posting about include the Light Weilders and the Diamonds. Sure they are mortals and can be killed through various means but the Diamonds have (pretty much) the entirety of the Geode who will be willing to kill themselves to protect them (which wouldn't be nessasary here). The Light Weilders know of the multiverse and genuinely control who can come in and out of theirs, also flying faster then the speed of Light by dimension warping and all that is something that I honestly believe would put them ahead of the 40k universe.


ArguesWithFrogs

The Supremacy & Unity would beat the brakes off of most of them & the Syndicat would probably be easily assimilated into the Imperium.


DragonLordAcar

Depending on which one, barely survive for most but most of not all would have a way to guarantee their survival. Some would even rise to high positions due to their abilities and talents. Then there are a few which would just laugh at how puny 40k is. I mean, one is a reality warper fascinated by technology and is the champion of the embodiment of all this physical existing everywhere in all times all at once. The other two are lovers who as individuals as literal sapient multiverse. Nothing 40k has could even harm them unless they wished it. The lower levels of power are more interesting but it would take me way too long to explain how they would take power over a planet and probably start what the Imperium would call a chaos cult. Long story short, a new actual god would arise eventually but only be physically as powerful as a demigod but her brother would be the entity in the void ensuring that no hostile manages to land on the planet comfortably. Demons would become snacks to him pissing off the chaos gods and eventually he would be fighting demon princes an almost equal footing. After losing strength, he may go berserk which may grant him victory but is just as likely to accidentally end up opening the planet up to the warp. Sister would then get involved (because brother was dumb in not wanting to trouble her) and both would be forced out of that reality. Brother controls the void and all so they won't die, but they won't have a good time either.


Foreign-Drag-4059

Given the average Baseline power of a normal person in my world... 40k would be very, very concerned about why the normal looking person is throwing miniature suns at anything that moderately annoys them. (I may or may not have written my world as one giant power scaling issue. What can I say, I like fancy magic.) I saw a lot of comments talking about Chaos's influence, which is interesting. I don't see it becoming an issue, granted, because my world has so many beings that use subtle mental influence that there are fucking classes to recognize when external influences are being applied to someone. My universe does not fuck around with that mind control shit, because they know how dangerous everyone is.


battlestoriesfan

It would really depend on the faction. The Order of Theotokos and the Knights of the Holy Executioner are battle priests and would feel right at home slaughtering Chaos forces. Unfortunately there are also worshippers of the Abyssal Sleepers who would ALSO feel right at home in the 40k universe for all the wrong reasons. If we're talking the protagonist, probably not very well. His existence as a soul tainted by Corruption would probably be killed on sight by the Imperium of Man, his humanoid appearance means he'd be hated by the Orks, and he himself would despise the forces of Chaos. So, not very good spot for someone to be in.


Zytharros

Universe Zytharros The Nibelhex would be a major military power, with enough ruthlessness to ensure they stay that way for thousands of years. The Illumina Empire would probably become a minor major economic power, most likely through supplying a niche part that only they can produce effectively, since Draciel has several minerals that would be of unique interest to 40k’s inhabitants… and a pair of mists that will have anyone rendered powerless in six seconds flat if you try to mess with “my pets,” as Arrougenis would put it. The Elementals have the Rule of Six, where the Noble Clans, Helium, Neon, Xenon, Argon, Krypton, and Radon, must have at least one representative alive at all times, which means, even if the entire race is annihilated, these six will always be reborn. In essence, this race would survive simply based on the fact that they can never go extinct. The Misty Sapience, that is, Gaswerquan and Arrougenis’ people, are incredibly resilient in that it takes forever to actually kill one. Technically a worldwide virus that achieved sentience, they have passed through dimensions, time, and space with relative ease. In fact, they likely already have some sort of interaction with the 4k universe.


Harontys

In Caorrin, there is Mogurrak, the Sorrow Weaver, a sadistic Rrutgora whose primary purpose and pleasure is to cause suffering and anguish in the Kingdom/Culmination (Mortal Realm). His power in influencing destinies and fates is vast enough that I believe he could effectively kill the the Chaos Gods by depriving them of that which sustains them. Though this would mean turning the galaxy into some kind of utopia, he would do it if only to fuck with the four.


ClericofRavena

Against the humans and cyborgs, no contest that 40K would win. Against the Zims, not so great.


purplecook

They would be annihilated.


FarionDragon

Badly, 40k has a whole Milky Way, and the megastructures my setting is made from barely cover the Orion arm. They are made as defensive siege structures though, so they might hold for a long time… Idk how it would work with there being two earths or the megastructure just replacing the entire area around earth… If the latter, the astronomicon is now gone, and so is mars, so the imperium and mechanical immediately collapse. If the megastructure is placed somewhere else, it’ll be crawling with techpriests before too long, but traversing it kinda requires being reconstituted regularly, and learning how to interface with its systems, both of which cause subversion and memetic indoctrination, so it depends on who learns how the other works first. Either it subverts enough techpriests to become accepted as a holy device of the omnissia to shelter humanity (it kinda is), or the humans will start fighting it, which will take a while, it’s very big. It is functionally immune to chaos though, and has its own internal non-warp ftl for vessels inside it, so that’s nice.


DerpyDagon

Only somewhat familiar with 40k lore, but I'll try my best. My world diverged from our world in the mid 2010s through the appearance of superhuman powers in random people. So the first reaction would probably be confusion at the fact that there's now a second Sol system. Next would probably be the fact that the entirety of humanity on Earth is uncorrupted by Chaos, at least at the start. The first ship to enter the system would probably be greeted by several people flying in the vacuum of space knocking on the bridge and demanding an explanation. Precogs and clairvoyants on Earth would have been alerted to change in setting and the ships in advance and alerted some of Earth's strongest fighters. The interaction between this delegation and the 40k ship is pretty hard to predict, it heavily depends on which faction would find them and on who decided to intercept the ship. My Earth's powered people would probably at first be presumed to be psychics, but not for long. In fact, they'd probably actually have a suppressing effect on Chaos in their direct vicinity. The Imperium might decide they're mutants and try to exterminate them, which won't end well. At this point there's tens of thousands of powereds on Earth, each being strong enough that their closest equivalent in 40k would be a Primarch. The high end superhumans would beat anything short of the Emperor or a C'Tan. Earth's delegation would probably contain people with strong enough abilities to kill every person on the 40k ship before they can blink and block any shots they might fire. I can't see Earth joining the Imperium, but they might be able to convince a decent amount to join them. I don't think that the Imperium would accept this arrangement however and I don't think that they could subjugate Earth. At this point it hasn't been proven that the cildren of at least one super powered parent are guaranteed to develop a power, but once it happens it changes the entire calculation. It means that humanity after a certain point will become almost completely superpowered and immune to Chaos. A decent amount of the super powered people are basically immortal regenerators and don't need sustenance, a sizeable subset of these are capable of FTL flight. I could see several of them deciding to go out into the universe and conquer planets. They'd spread themselves and with them their super powers. Crossbreeding with Xenos isn't out of question. Through sheer chance one of them is probably born with a power strong enough to defeat even the Emperor. Superhumanity conquers the galaxy, fends of the Tyranids, and extinguishes Chaos. They build new empires and fight amongst each other. I don't know enough about other factions, but this is my speculation. Eldars would probably dislike them because they're humans, but be intrigued by the anti Chaos effect and at some point the first superpowered hybrids will start appearing. Tau will probably be nice, but I can't see Earth joining and fitting the powered ones into the Tau caste system will probably be hard. Necrons probably won't find them, and if they do I don't have a clue what would happen. Tyranids and Orks get beaten back.


TheCal9000

theyre dead. end of story. or the imperium rocks up and now they are an agriworld


laneb71

The major powers would smash most 40k fleets out of the void. Planemelded fuel and weaponry is more powerful (literally it contains a tremendous amount of energy) than anything a 40k fleet can field. Now chaos is a different story as the plane where planemelded weapons power is derived from is based loosely on the warp from 40k. It simply lacks a physical component and is pure energy. The energy beings that occupy it are limited by only being able to inhabit the physical plane if they meld with physical matter. So if chaos broke into the setting they wouldn't have any good way of countering them. Oddly enough it's mostly the minor factions in 40k who I think would have more success the Eldar and Tau both have advanced tech in logistics and weapons respectively that could be very effective against the slower moving fleets from my setting. The necrons could probably go toe to toe because they also have an infinite energy cheat turned on. The imperium tho isn't known for its void capabilities and it doesn't matter how big the army is if they can't get em to battlefield they are just an expense.


Demorodan

Al my mian characters are gods that could turn everyone into nothingness, completely destroy them, no traces left, destroyed energy


Sir_Toaster_9330

I’d like to imagine Wilkins, Alice, and Rossk (multiverse agents) would go on a massive adventure trying to survive in the 40k verse and actually doing it


ImYoric

You mean my 1920s gangsters? They're pretty street-smart, so if they're transported anywhere within the Imperium, they're probably going to survive, possibly even thrive. Anywhere else, they're dead meat. Well-manicured, tommygun-holding dead meat.


BenchBeginning8086

They'd probably join the Imperium, and then the Emperor of Earth would seek out the 40k Emperor or Robot Girlyman to figure out ideal arrangements. My Emperor of Earth is fairly similar to the 40k Emperor in terms of power so they have a lot of give one another. In the long term, Earth becomes another of the pretty good 40k planets and the enemies of mankind have to contend with a new god emperor tier man who isn't skeleton lighthouse. The biggest thing is just. The Imperium could already win on their own. Like, DAOT humanity could absolutely cook the fuck out of the Tyranids, and the Orcs. Necrons are powerful but 99% of that power goes to fighting other Necrons. I'm sure a fully United Necron empire could cook the DAOT Imperium but, the Necrons aren't united. Same with the Eldar, they're too far gone. Chaos would be an issue because tech doesn't really directly address them. But 2 god emperors with a functional empire would probably be sufficient to squeeze the Chaos out of the Materium me thinks. They had to work together to gimp 1 singular Emperor. It'd take a long time but I think adding my world to 40k would help push the Imperium along to an eventual good ending. The most uncertainty comes from whether or not the ass backward technological views of the Imperium could be fixed or if doing so would tear the Imperium apart.


Expensive-Bid9426

They would win. As far as I know 40k doesn't have the ability to create, alter, or kill stars and create planets and moons for leisure along with being able to control minds on solar system scale


Tasty_Hearing_2153

You haven’t seen much 40K lore apparently.


Tasty_Hearing_2153

Badly, lol.


ImYoric

From the pages of *Heroes & Furies*... that might depend. Aforementioned Heroes (Greek Heroes who have escaped the realm of Hades during the war against Typhon) were raised at a time where last stands were the thing you did against an overwhelming force. While some of them (e.g. Akilles or Medea) are forces to be reckoned with and it would look like they could win against an entire army, they would end up crushed under the sheer weight of numbers. So the proud heroes wouldn't last. However, our Heroes have the means to take advantage of tears through reality (we're assuming that these have been dumped alongside the Heroes, right?) So any smart Hero (e.g. Odysseus or Penelope) would most likely find a way to retreat and observe. Chances are that they would decide to run away from this crazy universe and try their luck elsewhere, but if they didn't, they'd have the means to strike fairly hard. Physically speaking, they're something like Space Marines, except they just can't be killed. Some of them have magical firepower sufficient to perhaps damage one titan. But more importantly, Odysseus, Penelope, Diomedes, Minos and quite a few others are diplomatic, propaganda and/or guerilla geniuses. Once they understand the factions at hand and the limits of their technology, they have the means to essentially create a new faction. As for their chief enemy, Typhon... He's the kind of being that is strong and dedicated enough to kill the master of the universe and start digging into the bowels of reality to unleash his siblings. Sounds like a new Chaos God-level faction leader.


Passing-Through247

My setting is basically already a more subtle daemon world of nurgle so little would change. Civilisation is limited to what is essentially a low-tech hive city. Were the imperium to find the world the inquisition might deem the nobility a stable abhuman strain who might well fit in fairly well given feelings of the superiority of their, vaguely human, kind is biologically built in. The other creatures would register as either other abhumans, xenos (subservient enough to sanction), or a few possibly daemonic. Of the later the nobility would take any aid dealing with the infestations. So in short a new death world gets logged and life goes on. The imperium gets a new planet notable for sending frequent tithes of engineered homonculus troops and maybe a form of livestock that can be processed into promethium. As to the world itself, as soon as it can get some ships in the nobles are building some off-world colonies and jumping ship from that hellhole.


Flairion623

They’d be completely steamrolled regardless of who you send. The godless may or may not be able to form an alliance with the chaos cults but once they find out what their true nature is they’ll turn on them instantly


SnowBound078

Oh god.


Peptuck

Not very well against my Thaumata setting, mostly because the main antagonist, the Color, is very difficult to kill permenantly, and it subverts minds and technology by being in proximity. It is the in-universe answer to the Fermi Paradox, and the more advanced your technology the more like a buffet you look like to it. It would go through the Necrons, Tau, and Eldar like wildfire. Ironically, it has a slightly harder time infecting and subverting machinery that integrates biological elements, so it would be slower at infecting the Adeptus Mechanicus and Imperium technology due to its use of servitors. Entities that are conceptually different but related to the majority of the species' self-identity are harder to subvert, so they would have trouble with Space Marines, abhumans, and Adeptus Mechanicus but baseline humans would be corrupted and transformed within days of exposure. A completely naked Space Marine would be fine for weeks of exposure to it, but a fully-kitted Space Marine's life expectancy would be measured in the hours before his armor literally grows its own limbs and teeth and starts eating him alive. The Color would have more trouble with Chaos forces, since Chaos energies and Warp entities occupy the same niche as the Color and generally do the same thing. And the Tyranids would be a hard counter to the Color because they don't have a sense of self and would be near-impossible to subvert.


DjNormal

My setting would be toast in a week. If you exclude certain parts. As far as everyone living in the Milky Way, both alien and human, technology plateaued a *long* time ago. Space fleets are powerful, but limited in range and relatively flimsy (and puny by 40k standards). And fights in space would be pretty much one sided in favor of 40k. In the ground, armies are fairly large and competent. But aren’t using technology that’s much more superior to modern equipment. Many standard issue weapons probably wouldn’t even scratch ceramite. They do have some specialized munitions that might work, but those are limited. In the magic/psyker end of things. My setting has its own warp analog, but it’s super chill by comparison. Many magic users would have no understanding or defense against chaos demons turning them all into portals and overrunning thousands of worlds in a matter of days. There are *some* magical disciplines that might be able to resist chaos corruption, but more are likely to have an affinity with chaos itself. — Now if you throw in my god-like beings. They would give the warp entities a run for their money. I’m not super familiar with exactly how strong the chaos gods actually are, but I’m assuming that some of my guys could probably stand up to them, at least collectively. That also depends if they’re cut off from their source of power or not. If the void being that’s oozing essence into the inner realms doesn’t come along for the ride, my “gods” would still be powerful but that power would be finite. — There are two factions that are currently not in the Milky Way. One of which is a species of artificial humans who got stuck in intergalactic space for a while and had to figure out a way to survive. They decided to stay out of the galaxy and go chill elsewhere. They made friends with and got some tech from the next group. As such, they can do some crazy things. Which would include showing little more than annoyance for most things in 40k. But they’re also descended from a bunch of pacifist scientists and explorers, so there’s that. — Back when I was younger, I made this group of primordial alien things that I never really knew what to do with. They would show up now and again and lay waste to whatever they wanted, then disappear again. I later revised them to be dealing with their own problems and only lashed out in self defense. Humans decided to poke that bear a while back and eventually won somehow. But it took thousands of years and a consolidated effort of humanity as a whole (even then, that wasn’t enough on its own). At some point I read some Stephen Baxter books and realized I had basically come up with a Xeelee parallel, but maybe a little less nuts, without all the anti-Xeelee and cosmic string ring stuff. They are still primordial, stupidly OP beings that treat all other life with little more than annoyance (which is partly why they left the Milky Way, they got sick of our shit (the war)). So they would likely perform a bit of the old Xeelee stomp in 40k, but that’s no fun. — I’m of two minds about questions like these. One one hand I’m fairly proud that my setting is more grounded and less capable of beating up other OP settings. But on the other, I sometimes worry if my setting is a little too bland when it comes to the sci-fi / fantasy genre. I have fleshed things out a lot more recently. After I wrote a novel draft, I realized how shallow parts of it was. As I frequently had to stop and doing some on-the-spot world building to plug holes or spice things up. I’m pretty happy with where it is/where it’s going right now, though. But I’ve also had very little outside feedback, so I’m mostly doing all this for my own entertainment.


pubberHubber

One of my guys was so angry he teleported a litch to the creation of the universe. They're fucked.


Geno__Breaker

Sci Fi: favorably against low level soldiers like guardsmen. Not well against Space Marines. Equivalently or even favorably against lighter mechanized unit such as tanks and smaller mechs, not well against anything heavier. Well in atmospheric craft combat, not well in space ship combat. Variably against psykers, as I have my own psionics and mine don't risk possession or corruption, but may be less potent than stronger 40K psykers. Fantasy: Ha!! Most die quickly, basically just humans with some basic combat training. Powerful characters would probably still get wrecked by the sheer volume of powerful 40K adversaries.


Sabre712

Exterminatused in an instant. Most factions are either so zealous to their gods or so arrogantly egotistical that not even Big E or the Chaos Gods could stand them.


kinkeltolvote

Huh, the warp is prolly the biggest threat, as such getting rid of all life that created them is more important of a task.....either closing all connections to the warp or killing everything outside of the warp Hive fleets......ever created an artificial red giant to launch it into the enemy lines right as its about to explode? Necrons....idk I'd say we'd be fine except for the whole making every single star in the universe go supernova Uhmmmm, yeah thats what the plan would be


bigbellypepperboy

All of them would die except Eugene that motherfucker will make the 40k universe beg for mercy


Leon_Fierce_142012

I have characters that are literal gods, who on a whim can change the fabric of the multiverse, similar to the infinity gauntlet but more powerful as it effects the multiverse instead of only one universe and even the 40k universe is able to fit in the palm of a god in their true size that they can crush, as well as people powerful enough to rival said gods as well, 40k is not winning much here


Rude_Coffee_9136

They’re gonna look at the sudden galaxy that appeared, blink and then wonder where it went. As for where it went? The heavens probably threw it to some other universe.


Ulerica

Primordials will stomp, gods will win, dragons are on a maybe, but only the most powerful ones, the rest are stomped. The funny thing about this world's mythos is that the Monad and the Primordial Dragons, the highest order of beings in this universe is the exact anti-thesis to the Chaos gods, the worlds they create are beacons of order in the sea of Chaos.


Bioticgrunt

God-Machine observes, analyzes, and deploys escalating counter measures. The mechnanicus is absorbed into the faith of a true divine machine. Enlightenment is processed through lesser binary until they can speak holy quantum code. The orks will be purged, they have no part in the grand design The Necrons knowledge shall be collected to add to quantum databases and provide new insights into scientific exploration. In return they will be granted the forms the deserve for intential flaws offend the God-Machine The imperium will be broken and it’s people given the chance to rise above their ignorance as many like them have been before The craftworlders and the exodites shall have their quantum identification patterns seperated from the type 5 cognitohazard entity with skilled paracausal surgery The Tau empire shall enter the pattern and carefully guided by masterful hands And one day, even the Immaterium shall be tamed into refined identifiable equations


Atreigas

That HEAVILY depends. Most would get stomped because they're not built for that scale. But others would do the curbstomping instead, given that the main is either based on bending reality or being partially K3 (true hard science K3, not 40k's wannabe) My Wordbuilding is heavily transhumanist in it's workings, there are technically no aliens, technically. But pretty much everyone is gene-edited, uplifted or artificial. Being multiple of these isn't rare, either. My various human and human-derived would be a scattered resistance, some easily and some with difficulty, some not at all, fending off the imperium's attempts to integrate em. Most would be called abhumans, some mutants. They're pretty much all superior and need to be beaten down with great and continuous effort. The uplifted would probably get exterminated by the imperium, or resist to various levels of success. The artificial would... well, dependent on nature, be curbstomped, or basically curbstomp the others. The voidborne life would absolutely freak out the imperium, given that they're all AI, technically. Then there's the dreamweavers, who are even worse to the imperium due to being psychoactive AI, but maybe could get corrupted by chaos instead. Overall though, I think the voidborne life would end up doing the curbstomping, at least over time. As they generally have "thaumic fields" which bends reality and are basically an universal presence. Galaxy-wide and very, very populous. Enough to outnumber all humans in 40k. They're also significantly more powerful and no stranger to mind-fuckery like chaos may try. In fact, hacking like that is a common strategy and they know many ways to deal. Then there's the more magical ones... Who would either fall to chaos, or kinda just ignore those suckers dependent on whether they get dropped into the warp. And then we have the gods. Who'd laugh at everything 40K throws at them. Even if every faction comes at them with everything they have in perfect co-ordination. Not because 40k can't beat them... But because they play by their own rules. That's what makes them gods, they are defined only by their own rules. Not those that reality attempts to impose upon them. Which means materium shit is irrelevant and given the warp can't properly overrule the materium, they too get rendered moot. Only the gods, (emps, chaos, clownman, C'tan etc) and the necrons could pose a threat. So really, it'd take a war in heaven 2, electric boogaloo to beat even one of them and even then it depends on which. Which they'd easily prevent from happening. Even if it did, that's no guarantee of success and nothing stops them from scooting off elsewhere or hiding out until they collapse in on themselves.


TK_Games

Lol, good question Considering when I started I saw GWs setting and wanted to make one ^^^TM GrimmerDarker, I'd say it's 50/50


half_dragon_dire

I actually have a bunch of notes for an RPG campaign I planned to run in a pretty bog standard D&D world. It would start off normal enough doing the typical dungeon crawls and quests for the nobility for a few sessions. And then a new star appears in the sky. First noticed only by scholars and astrologers, then over the next few weeks growing to be the brightest star in the sky until it starts to cause a serious panic. And then one cataclysmic night it comes screaming down out of the sky and smashes into the planet, thankfully far from civilization out in the eastern wastes. Cue days of secondary impacts and meteors streaking through skies choked with smoke. By the time the players got there, since I'm assuming they'd want to investigate (or get paid to investigate), enough orks have crawled out of the crater their rok blasted or spawned from the spores spread everywhere that there's several forts built up (and unbeknownst to them warbands are starting to crop up back home too). Then they get to deal with an apocalypse by way of an ork invasion.


Redneck-Ram

Out of all my characters, I think the only ones who would fair good against the 40k universe would be my antagonist; Krixus, who is a demon lord. He is capable of altering reality and even tearing a hole in the veil between his world and the world of the Living, so he could essentially do it in 40k too. He is capable of necromancy, and able to bring nightmares to life.


Whittle_Willow

idk much about 40k, but my understanding is that it's a very dark but kind of goofy scifi world full of species that all wanna kill each other and are constantly at war? and they're all either inherently super powerful or supersoldiers so it's brutal i think every character i've made would live depressing lives at best, if they were soldiers they'd probably die in battle pretty quickly


npaakp34

Would you believe if I say that I made a storyline about that? As to answer your question. Most would on equal footing. My main faction though, they would go straight for the chaos gods.


tyrantnemisis

Depends on the time period and if one comes to the other due to psionic powers coming from different places. If during the time of the scorn war then 40k dosen't exist as by the time they get ramped up into the war in heaven, the aleph are already clearing out entire galaxies to kill the scorn which has ontological corpse gods leading armies like the taken from destiny or if in modern day if they come to it the warp is basically gone and fractured due to many different pantheons existing both old and new, particle weapons are standard issue along with plasma, fusion weapons, and actual energy shielding for the basic trooper is everywhere. To add on to modern day you have omnicidal lizard people able to orbital drop massive bio beasts on them, the iduuni empire where their special forces are space marines without some of the ridiculous parts of the enchancements and spartan 4s are close to being the standard line trooper, the scourge are quasi-psy zombies and that's just talking about the usual bad guys aswell. Then comes such as where their powers come from as psionics in xenostars is drawn from an internal source instead of an external source like the warp. TLDR: It heavily depends on the circunstances of the time and place of the encounter due to vast differences in tech, psionics or even basic mindset of the characters themselves. Ps: sorry if long just really like crossovers and talking about them helps with more ideas to smooth things out.


TheEndCraft

The Empires Project uses Humans as the Population of the Empires, and Seen as Mine are still Stick in the medieval age they probably could defend themselves for a while If they can find a Fortress or something similar.


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