Shaeph wrote:kind of clique but the "mutants have bands" kinda thing really makes it unique,
Well, there's a bit more to it as well:
The PRA is out to exterminate ALL of the aggressive mutants (and a lot of them would like to exterminate all of the non-agressive ones as well).
There are small settlements that are not controlled by the PRA.
Many of the small nomadic groups believe that the apocalypse was actually THE Rapture. They either think that God is corrupt and didn't take them even though their lives were lived the right way or some groups believe that a second Rapture is coming and it is their duty to exterminate all of the non-believers before they are allowed into Heaven. Another small group also believes there will be a second Rapture, but they need to keep living good lives and therefore should not kill all of the non-believers. This last group are mostly what makes up the small nomadic groups.
The mutants have their own culture as well, acting more as orcs or barbarians (most of the mutated humans are the minifig-sized trolls) than anything else. There are mutated creatures as well (which I will be using dinosaur figs for in some cases, just to give an idea), but compared to the human mutants they are not as aggressive.