In both G&K and vanilla, nukes are incredibly powerful. They probably SHOULD be incredibly powerful, as they are weapons of mass destruction. The problem is, in real life, there are massive diplomatic consequences of using nukes, and morals come into play as well. Morals don't really come into play in Civ; if someone's closer to a victory condition than me, I simply nuke them into oblivion (that's how I win about half my games on King). Don't get me wrong, nukes need to be powerful, but there needs to be a bigger diplomatic backlash than a bullet point for foreign civs. And then the biggest problem is the bomb shelters. I was hoping G&K would make it a viable option to defend against nukes, but the problem is the shelters come INCREDIBLY late in the tech tree, even later than nuclear missiles. First of all, as a game concept, that makes no sense - if you want to even the playing-field, why not make them available a little earlier? I figured nuke shelters would be a way for tall civs (likely going for a cultural victory) to defend themselves when they get a little behind in science. And in real life, the concept makes no life either. You're telling me I need to be able to build the UN before I'm able to build a measly bomb shelter? It makes no sense.