The title "Fallout" has always been a play on words. It's the result (fallout) of people getting nuked back to the stone-age and the physical/social damage from the aftereffects of the residual nuclear material (fallout).
So, while you would need the style of the original games (dark humor, how people default to their most basic instincts/desires when bereft of authority) to call it a Fallout game, the geographical location really has nothing to do with it.
North America has one of (if not the) biggest audiences for the Fallout series, so while basing the cultural references on the culture of your main demographic may not be necessary, it's financially -required-. A Fallout game can take place anywhere in the world, but the problem is knowing how far the general, global costumer base's knowledge extends to regarding that place's culture, because that will determine exactly how much material you have to work with in order to sew in that dark Fallout-esque humor.
Not having taking place in the americas does mean the lack of certain factions/elements (Enclave, vault co) but in the end those are merely set pieces, simple systems. Fallout has been "yet another" post-apocalyptic game from the start, it just didn't matter because it is a well made game. Period. Having a Fallout game written anywhere but America would no more estrange itself to the "Fallout" series title than losing turn based combat did for #3.
So, while you would need the style of the original games (dark humor, how people default to their most basic instincts/desires when bereft of authority) to call it a Fallout game, the geographical location really has nothing to do with it.
North America has one of (if not the) biggest audiences for the Fallout series, so while basing the cultural references on the culture of your main demographic may not be necessary, it's financially -required-. A Fallout game can take place anywhere in the world, but the problem is knowing how far the general, global costumer base's knowledge extends to regarding that place's culture, because that will determine exactly how much material you have to work with in order to sew in that dark Fallout-esque humor.
Not having taking place in the americas does mean the lack of certain factions/elements (Enclave, vault co) but in the end those are merely set pieces, simple systems. Fallout has been "yet another" post-apocalyptic game from the start, it just didn't matter because it is a well made game. Period. Having a Fallout game written anywhere but America would no more estrange itself to the "Fallout" series title than losing turn based combat did for #3.