Your players will never forget the time that you smashed the entire North American continent and left it for them to pick the pieces.
The Sixth Seal is a serialized adventure path for Supers20 - in which the United States is devastated by a massive nation wide earthquake.
For various business reasons - I choose to discontinue Defcon1 through Adamant and find a new publisher. I'm not planning on saying any more about that decision publicly (unless I'm compelled to). If you'd really like to know more - feel free to email me.