It's no longer a game

There was a time, once upon a long time ago, when heroes mounted horseback, waved their weapons. May the strongest man with the biggest weapon win the heart of the fair damsel.

Northern hemisphere fantasy hero games ..

So far, we have talked only of the Northern Hemisphere. But it now seems - unlike the case of a single nuclear weapons test -- that in a real nuclear war, the heating of the vast quantities of atmospheric dust and soot in northern midlatitudes will transport these fine particles toward and across the Equator. We see just this happening in Martian dust storms. The Southern Hemisphere would experience effects that, while less severe than in the Northern Hemisphere, are nevertheless extremely ominous. The illusion with which some people in the Northern Hemisphere reassure themselves -- catching an Air New Zealand flight in a time of serious international crisis, or the like -- is now much less tenable, even on the narrow issue of personal survival for those with the price of a ticket.

Carl Sagan.