If Nate Died.

[Drug Enforcement Agency]

So I will be talking about what would happen if the sole survivor died in vault 111. whether kellog killed him or he was permanantly frozen in the cryopod doent matter. I will be talking about every faction including the Enclaves and new vegas factions.
Lets say that your player wasnt around for any game. you never left vault 13,I dont know fallout 2 so lets just say you died from rad poisoning, died in vault 101, the courier was killed, never got out of vault 111, and decided to never leave vault 76.

Vault Tec= Institute synths would eventualy disguise themselves as vault dwellers that went out for trading or resource collecting. Or force themselves in via ballistic means.
BOS= They would still come to handle the synths and super mutants. But they would have a very hard time getting liberty prime working. Or if they can get him working at all. They would not be able to use you to get inside information either. Along with the Institute would eventualy create battle weapons such as laser tanks or mech suits for synths to use.
Raiders=Raiders are loosely organized already. so they would be living on forever in places like the vegas wasteland. Or they would be taken prisoner and they would die out.
Gunners=They are more organized. They would be hired by a faction to fight with them or they would join the raiders to live like weak brutes.
Minutemen=The minutemen would still suffer huge casualties in Lexington and would possibly be killed by the raiders. Since there are only 5 left they would not be reclaiming the castle unless they permanently hire gunners. but they would not have the caps or weapons to make that kind of trade. Sturges could reprogram codsworth to be a mr.gutsy model instead of a handy. or else they would die out
Codsworth=Codsworth would continue trimming the hedges in sanctuary.Or he could become the next minuteman general if he is reprogram-ed
Enclaves=The enclave were dying out already. so they would quickly fall to pretty much any faction other then raiders.Most likely to the BOS
Railroad=Since the sole survivor doesnt come around they will be stuck in the church basement. They have lost many bases and will either be killed in the basement by an earthquake or the institute after they track the location before the hardrive is wiped.
Nuka-Raiders=The nuka-raiders property dispute would never be settled. and they would never get to the main parks. they would fall to insanity and kill eachother.
Children of Atom=Radiation poisoning would eventualy get to them. Causing them to fall in both the island and the glowing sea. Or the glowing sea beasts would kill them in the commonwealth. Anglers,Gulpers,and Fog Ghouls would handle the island ones.
DiMA=His faction would become superior to The Island. At least it would be for the institute spread farther south and reprogram them to be with them again.
Boomers=They have very large weapons and robots. The institute would eventualy move farther west and be at war with them.They would be a fair war enemy until the institute used gorillas on the battlefield or made tanks. They would eventualy die.
Reponders=They would most likely die before your characters came around normaly.
NCR= the NCR would most likely be the only other faction left other then the BOS. They have lots of soldiers and weapons.
Ceasers Legion=They are already primitive. They would be killed by another faction soon. Or taken slaves by some faction.
Super Mutants= The super mutants are hated by many many factions if not all of them. they would most likely be culled by Institute,BOS,or the NCR.
White Glove= They think they are rich and above everybody. Do to not letting just anybody join them they would most likely be killed due to falling to small numbers before they can grow.
Great Khans= The great khans would most likely fall to the NCR or BOS slowly. Due to the hot desert wasteland water can be scarce and if they are forced away from their bases they could be picked off by other factions,synths,or dehydration.

So in the end the last remaining factions would most likely be BOS,NCR and possibly enclave/boomers. The gunners would be hired to extinction until they are all parts of different factions.

[Potenza]

Similar discussion -
https://steamcommunity.com/app/377160/discussions/0/1741106440029550051/

However, as I remember that thread did get heated and arguments ensued. Maybe a new thread without fighting would be good.

[Grendalcat]

Mixing F4 and FNV factions. Oh my.

[Chaosium]

Yeah I don't really see what impact Nate would have on the Greath Khans to be honest

[Drug Enforcement Agency]

If nate never came along no one would have the unrealistic help that he gave them.

[Drug Enforcement Agency]

And to grendalcat read the one above. the institute would of spread farther west and things are gonna mix eventualy

[Grendalcat]

I'm not sure the Institute would spread very far. They can hardly be bothered to come out of their hole as it is. Except for scavenging by synths.

And the effect on FNV factions depends heavily on who the Courier backed in the Mojave, as some of the factions might not even exist anymore.

[Drug Enforcement Agency]

Lets say that your player wasnt around for any game. you never left vault 13,I dont know fallout 2 so lets just say you died from rad poisoning, died in vault 101, the courier was killed, never got out of vault 111, and decided to never leave vault 76.

[Dinger]

there would be no game to play ..

we would never be having this conversation...

maybe we were never born ..

[Drug Enforcement Agency]

No not like that. lets say you play as a character already in the wasteland. So you comeplete your objective without interfeiring with any of the factions