Leximodicon said:
Fallout outside the USA would never be as charming. The art style is all based on the 1950s American vision of the distant future of 2002.
The whole 50s thing was honestly a creation of Bethesda in Fallout 3. Certainly there are some thematic throwbacks to the 50s from the beginning, but in Fallout 1 and 2 it was supposed to be America and the world as it was, extrapolated to a future that was completely possible from where we are right now. The whole alternate timeline thing was something Bethesda created because a lot of people were very uncomfortable with a full 3d rendering of Washington DC being demolished so they wanted to put some distance in there. From what I understand, in Fallout 1 and 2 the 50s throwbacks were more a cultural commentary, suggesting that modern society hadn't come that far from the regressive 50s, and that we were just as much at risk of apocalypse today as then. This being the 90s, everyone was filled with optimism during the brief lull between the cold war and 9/11. They were trying to be downers. At least that's my interpretation, I could be wrong.
In any case, the only thing keeping a Fallout game from being set anywhere outside the US is obstinate adherence to tradition for its own sake. I personally hope that one day everyone can experience their hometown in post-apocalyptic wonder. I grew up around DC - the vault is situated almost exactly on the neighborhood where I grew up. It was one of the most entertaining video game experiences of my life, and I hope everyone can experience it one day.
I think some of the best locations would be:
New York - a series of fortress enclaves fighting over pieces of old technology, ghoul and mutant infested subways that are the only way to travel without dealing with territory and politics - great potential
Mexico - centered around Mexico City, it would be especially interesting if it wasn't directly hit, and was actually doing better than the US, though it would still have been covered in radiation and have all kinds of strange wildlife (chupacabras, anyone? They may not be real now, but no reason they won't be after enough radiation...)
Australia - reasons posted above, though like with Mexico maybe it wasn't directly hit but still had to deal with nuclear winter and no vaults
China - see how the other side of the war went, with a Chinese version of the Enclave ruining everyone's life - maybe even have a situation where the Enclave is openly taking over everything, and stuff is more bleak - no NCR out here to fight the man. Could lead to some interesting moral choices - do you help the Chinese Enclave, even though they're oppressive, since they provide people with basic order and protection? Or do you fight the system, joining with slavers and other undesirable enemies of the state and possibly destroy entire communities in the name of your Anarchic crusade?