» Fri May 27, 2011 12:57 pm
There are a lot of factors at work here... some have been misrepresented here in my opinion.
First, as said, Vault 87 had been doing FEV experiments before the bombs even fell, making the super mutant infestation that came from there something that could have happened as soon as the day after the bombs dropped. A steady stream of super mutants into the capital wasteland could curb human rebuilding pretty quickly I would think.
Second, the "benevolent Brotherhood of Steel" people have mentioned only arrived in the area 20 years before the game begins. The reason Lyons stopped and built a base in order to protect the people of the area was because it was so bad off, indicating in-game that the wasteland is worse off than other areas of the nation, like the West from whence Lyons came.
Third, while not nearly as well off as things we saw in Fallout 2, Megaton and Rivet City are pretty well off in wasteland terms. Remember that like all Bethesda games, and even the original Fallout games, what we see in-game is scaled down... Megaton probably has hundreds or even low thousands of people living in it in actual fact. It also has running water, neon signs, etc. etc... Rivet City has the same kind of stuff, as well as researchers and, in Broken Steel, an active water shipping service. I don't think these are too far off from the original Fallout's settlements, really...
Lastly, let's remember that Fallout 3 was designed as both a continuation and a sort-of reboot of the franchise, in that it strived to reintroduce everything unique about Fallout to a new audience, and also to the old. In this regard, I am sure Bethesda wanted to start with the more Fallout 1 style of total post-apocaliptic wasteland desert civilization vibe... their next game, or New Vegas, given its location, might be more in tune with Fallout 2 and such.
Very often fictional series do things for real-life reasons that fans explain away... I think we have a lot more ways of exlaining away the FO3 differences than a lot of other fiction series changes.