From their announcement:
The nukes have flown, and darkness has spread across the globe. Yet the missiles didn’t bring the apocalypse many had predicted. Rather than total, the exchange of nuclear-tipped missiles was limited. Rather than complete, the destruction was merely crippling. Now the war continues, fought with a strange mixture of equipment—some of it more suited to a museum, some of it fresh off the assembly line, and now the war has moved to the shores of America. For more information, and/or place a P500 preorder.