When I first started working on this game, I put a lot of thought into how nuclear weapons should be incorporated. The easy solution would be the 'war game' solution, where basically there would be no nukes and the game would be strictly conventional. I thought that this would be kind of an easy way out, though, as nuclear weapons were central to all war planning and foremost in everyone's minds. The unpredictability of how nuclear war could unfold was a major part of their effectiveness as a deterrent. Despite all the planning and strategizing, no one truly knew what the threshold would be for nuclear war would be or whether the number of weapons used could be capped or contained. The problem, though, is that while in real life there is plenty of motivation not to nuke the world, in Civ the consequences of nuclear war are slight.
I spent a bunch of time reading what I could about nuclear war planning and how weapons would be employed. Quite frankly, it made for pretty sickening reading. But when I did some tests, I think that Civ III actually has a pretty good system set up for nukes. To my knowledge, the AI will not launch a first strike, even if they are threatened with extinction. If you launch first, however, they will retaliate, and your rep will take such a hit that neutral nations will attack you. So I went ahead and included nukes in the game, which is where it stands now. Originally I set up a torturous system of techs and upgrades that would require you to upgrade your nuclear forces from standby to active, but this proved too cumbersome. Nukes are now active from the start of the game: you can start the war with a bang if you like.
Russia, America, France, and Britain all start with nuclear forces. ICBMs are set in their historical silo locations (or home bases for mobile missiles) and work just like Civ 3 ICBMs. Submarine-launched missiles are air unit missiles that are based on the appropriate submarines. Although having nukes as air units greys out the Nuke strategy in the editor, it seems that the computer will still use them properly. There are also theater ranged weapons like the Pioner and Pershing IIs. Historically these were being phased out by the INF Treaty of 1987 but in game the treaty did not happen, so they are still in play. From what I've seen, the game gives you a freebie on your first nuke attack. After two or more, though, the AI will retaliate. All nuclear missiles and submarines are marked with the nuclear flag and therefore can't be destroyed by other nukes. So the enemy retains second strike capability.
So it's all up to you on whether the game will degenerate to total nuclear war. I didn't add any post-apocalyptic mutants in dune buggies, though. I'll have to save that for the sequel. As for multiplayer, more thought will have to be put into how to set nukes up so the game doesn't become pointless.

Pic with smoking guy - looks like he smokes soviet "Astra" or "Prima" (no filter).

Nostalgia. My granddad smoked them. Miss him.
They don't make good unfiltered smokes like that anymore? Damned capitalism.
