Another trope that I don't think's been touched on yet is this: we did it to ourseves.
Think about it a bit - like the ever popular zombie flick, post-apocalyptic fiction isn't so much about the disaster as what happens after. The world, after all, isn't the people on it. The world is a system that the apocalyptic event breaks down, catastrophically.
The real meat in any post-apocalyptic game or fiction is dealing with the aftermath - do you succumb to savagery, turning on your fellow survivors to eke out a bare and pitiless existence in the wasteland, or do you choose to try and rebuild, perhaps avoiding the mistakes of the past? The drama is, ultimately, a human one. Everything else is just a set piece.
Think about it a bit - like the ever popular zombie flick, post-apocalyptic fiction isn't so much about the disaster as what happens after. The world, after all, isn't the people on it. The world is a system that the apocalyptic event breaks down, catastrophically.
The real meat in any post-apocalyptic game or fiction is dealing with the aftermath - do you succumb to savagery, turning on your fellow survivors to eke out a bare and pitiless existence in the wasteland, or do you choose to try and rebuild, perhaps avoiding the mistakes of the past? The drama is, ultimately, a human one. Everything else is just a set piece.