This one is hard to describe. But I'll make a quick example to make it somewhat easier to understand.
Fallout for instance, it has been set with a 50's aesthetic throughout its entirety. What we were to say swap the 50's with 80's instead? Rather than the fight for natural resources, it was the Cold War that's responsible for dropping all the atom bombs?
I got few ideas:
- New Nuka Cola are now more prevalent as Nuka Cola Classic is more rare and sought out by the wastelanders.
- The punk scene has gotten more out of hand with each genre of punk becoming its own tribe.
- RobCo now has competition with a ingame equivalent to Apple taking over the computer market.
- Music would probably be more diverse with the inclusion of synth and the emergence of rap that was happening at the time.
- Neon lights now replace fins in the cityscapes and PIP-Boy displays.
- Mister Gutsy's are now sporting a look similar to that of the Terminator/RoboCop.
These are just a few examples I could think of.