I was thinking while most of the population kept underground, some ventured to the surface to try and challenge the dangers in order to find a new home. With that comes factions ((You know, the Nazis, the communists, etc.)) and they eventually [[like in ze lore]] begin to wage combat against eachother. I was thinking of having a faction that was pretty much The Order in the metro plot, but instead of calling them Rangers we can be more 'murican and call them Marshals XD. 

Nuclear war might be the best way to pop this RP off, it leaves a lot of stuff behind that could be used for.. 'spiritual' moments. This would probably be 10 years after the destruction of the world, so to have a more diverse age base. 

I am off to work, I hope that answered a few inquiries out there!