A multi-facited roleplaying experience that centers around one of the only living humans with full memory of pre-war America at the height of its civilization. A twenty-something protagonist with the insight of a generation two centuries past; from the society that lived in, and maintained their 1950's future paradise, in their year 2070.
A game where the PC's origin can either be of the masses, enthralled by their dishonest government's representation of the world, and its future, and its precautions for public safety; or can be one of the those tasked with perpetuating the myth, and party line, and keeping the masses orderly; or could have been a radical objectionist who tried to expose the myth for what it was, and yet somehow managed to secure a place in a vault, and survive without ~accident...
All and either/or... a PC now cast into the future; stranded in the post apocalyptic remains of their former society ~now bombed into Oblivion. A place where their unique perspective, education, and training can shape the future wherever they go, and of whomever they talk with. The ultimate archaeologist/adventurer who can teach the masses how best not to repeat the past mistakes of their forefathers ~coming straight from the mouth of one. It is a game where they recognize this and react accordingly.
Gameplay-wise a strategy game of careful tactics, including diplomatic selection and avoidance of targets, and factions; as the player weaves their path through the political minefield of the post-war [almost feudal] society; and where the PC has unique standing with the ghoul faction, for having a common understanding of pre-war history ~equally first hand.
Ultimately acquiring a GECK, and enough political influence to unite a number of tribes and settlements to march them off to a new Jerusalem ~established by the player, in the place of their choosing; to become the Hub of society. A post apocalyptic melting pot; where the endgame shifts into Civilization management, but where the PC can actively venture out into it... A bit like Dungeonkeeper/Black & White. And like those games, the PC can be a benevolent ruler, a tyrant, a military dictator, or establish a council of elders.
** In a way the middle game would be almost like Brütal Legend in some respects; and could even include nominating a ruler from the faction of the player's choice, if they wished that instead.