I have imagined the last few days a game set about the same time of Fallout 1, somewhere 50-100 years after the great war. DC and the surrounding area is a allround crappy place, even for post-nuclear war America since it was massively bombed in the great war. People mostly survived in the vaults and government bunkers. And that's were our story starts. During the 21st century good old USA got a lot more paranoid, authoritarian and sectarian in it's government and leadership, the different departments even more than in our timeline looked to their own interests and the closer to the great war got the budgets swelled and so did their rivalries with each other. They buildt large underground facilities under their headquarters to house the core personnel of the departments and their families in case of nuclear war as well as sustain their lifes for many years. The departments could theoretically continue to exist and funktion underground for over 20 years completely isolated from the surrounding world. Many of these underground bunkers and complexes were also connected to each other and other underground installations such as the DC Subway system, larger bomb shelters and archives connected to downtown facilities in the pre-war DC Bunker project. As the war draw nearer many in the upper government got a head start over regular folks and much of the personnel of the departments made it into the bunkers under their headquarters, as life were wiped out on the surface they survived underneath. Contact with the outside world were completely destroyed and for many years they continued their life underground, believing that not much else survived. In the underground system they tried to set up a common leadership and cooperation but it ultimately failed and they isolated themselves from each other. Over time their culture and ideologies changed from each other even more and they started to infiltrate and undermine each other, the conflicts escalated to open conflict and war. When they re-emerged on the surface the conflicts continued. They took over their neghbouring areas and fortified the ruins of the headquarters into large fortress-like structures. Raiders and settlements were bullied by the strong military force of the departments and soon much of the DC ruins were claimed by the various factions. The most powerful was the Pentagon with the remnants of the defence department and the NSA, they boasted the largest military. In northern Washington the remnants of the Judiciary department and FBI controlled another swath of land equiped with pre-war heavy police gear as well as some power armour suits made for chrisis crowd-control. In Langley the remnants of the CIA rules etc. These factions are somewhat similar to the BoS of the west coast, despite not being strictly military they had access to a lot of resources and arms before the war and stocked their bunkers full with weapons, robots, ammo and everything they think they would need in a worst-case scenario. They also don't care much for non-members such as other factions and wastelanders and see only to their own interests, looting the surrounding areas for weapons, technology, food etc. They are also vaguely reminicsent of the Enclave, but note that they are not under their control, the Enclave abandonded DC and the East Coast for California and the Offshore oil rig. The top leadership of the Government departments were part of the Enclave and similarily abandoned their organizations following the great war. The leadership of the later department-states are descendants of the second-tier leadership and middle chiefs that were left behind. The Department states are very much armed after how they looked pre-war, the defence department is largerly military and has a lot of military equipment, while the FBI fights fights in pre-war police armour and weapons. All of them have some access to Power armour suits though. Some of them, like the CIA have great skill in subterfuge etc. The culture of the departments have shifted as generations have passed, now they are basically high-skilled and armed tribal raider factions with access to Power armors and high-tech weaponry. They fight under banners simplified from pre-war symbols and insignias while seeking knowledge and power from the hidden archives and labs under DC. The DC ruins are vast and dangerous. It was a lot larger than in our universe and got bombed a lot in the great war, making it a crappy place to be. It's littered with ghouls, mutated freaks, dangerous wildlife and raiders. The only civilized areas are around the bastions of the various department-states, their soldiers always try to seek through the ruins and underground facilities of Washington after pre-war military secrets and technology. The rest of the DC ruins are littered with ghouls, raiders and various kinds of mutated freaks and animals, remade by radiation and dark pre-war experiments. Raider gangs, prospectors, hired guns etc. also exist a plenty, often in some form of proximity to the department-states. Outside the DC ruins there are small towns and tribes, and that's where you start, either in one of the vaults or as some town-dweller or tribal. I haven't figured everything out yet of course so if you have any input, suggestions or objections let me hear.