((Is this an ok place to put non-fantasy setting ideas?))
Post Apocalyptic airsoft LARP setting. So far, it's just the beginnings of an idea.
In the year 2013, nano technology is implemented in manufacturing, making products that are cleaner, stronger, lighter, and often less expensive than with conventional manufacturing methods. However, some sought to use this new technology as a weapon.
2021: War. (circumstances of this still to be determined, probably will involve a limited nuclear exchange) Warheads launched at major cities in the United States. These warheads were meant to cause damage, but their primary purpose was really to spread a specially made nano-bot nicknamed Grey Goo 13. This Grey Goo bot was designed to attack circuitry, rendering electronic equipment useless. The nano-bot spread quickly, taking down communications, transportation, and modern weaponry. A few areas that managed to learn what was going on in other areas of the country, attempted to quarantine themselves in an effort to keep the nano-bots out, with varying degrees of success.
I've still got a lot to work out, such as how long the bots "live", how they spread, effect ways to protect against them, etc. But I would love to get some input on the general idea.