Setting: what was once Northeast US
Intro:
New Manhattan's residents celebrate the New Year as a glowing ball comes down in the final seconds of 2299. Just after the celebration and Happy New Year of 2300, jubilation turns to chaos with a bombing attack on the crowds.
Factions:
The Commonwealth
The Commonwealth controls the states of Maine, Vermont, New Hampshire, Connecticut, Rhode Island, and Massachusetts. The Commonwealth Police operate the Synth Retention Bureau, tasked with capturing escaped androids. At the time of the game, they are intent of controlling the New York City area, which is independent.
The Institute
A collective of scientists located in a huge facility near Boston. MIT was rebuilt as the Institute intohttp://fallout.wikia.com/wiki/Boulder_Dome. The Institute develops the most advanced technology known in the Fallout universe, including synthetic humanoids. They are morally ambiguous however, seeing greater technology and science as their main goal, as long as they stay in control.
Terra Nova
An underground sub-faction within the Institute. Favors more benevolent use of technology by the Institute and more humane policies by the Commonwealth.
The Railroad
A group dedicated to the interests of synthetic humanoids. They want to free all sentient robots from human domination.
Mountaineers/Green Mountain Republic:
A militia working against the New England Commonwealth. Headquartered in Vermont. Opposed by the Commonwealth.
The Ancients
A wacky, quasi-religious group of primitivists. They oppose all technology. They use melee weapons like machetes, clubs and axes instead of guns.
Locations:
New Manhattan:
A walled city where Central Park used to be. The walls keep out feral ghouls and Raiders.
Silver City
Robots and androids live in this town in New York City. The city is actually a refurbished skyscraqer.
Boston:
Capital city of the Commonwealth where the Institute and Synth Retention Bureau are.
Brattleboro:
Headquarters of the Mountaineers.
Gaia:
Capital city of the Ancients.
Those are basically my ideas for factions and locations...although I got the idea for New Manhattan from a thread on here. New York City would be heavily destroyed but there would also be lots of ruins and probably at least some skyscraqers standing at least partially. It would be very nice to roam around a big city like that and especially to see all the landmarks.