Fallout 1 , 2 and New Vegas by the original developers were the story of humanity rebuilding . Over the course of the two games set over about a century , you see the rise of multiple postwar nationstates like the New California Republic , Caesar ' s Legion , New Vegas , New Canaan , Enclave , Brotherhood of Steel and so forth . The original games were set in the desert western US and were about humanity rebuilding . Fallout 3 and 4 by Bethesda are set on the east coast DC and Boston but both are still inexplicably deserts and still appear to have not changed in 200 years . People live in shanty towns and in decrepid buildings that still have skeletons in them ? ! The difference in vision between the two developers , needless to say , is not a welcome one by many .