Even though we've been at this on and off for five years(ish) the story line is still very underdeveloped.

The basic idea is that there are zombies and the world has been destroyed (for the most part.)
Thats a pretty general idea. I want to incorporate the idea into a large picture. Possible being that the virus was realesed as a bio weapon following a Russian or chinease (or both) invasion. Also used where chemical and nuclear weapons.

Anyone ever read the "Deathlands" series by James Axler? Its your sterotypical "the reds nuked us and we nuked back" story. However they also used variety of other weapons such as bilogical and nuclear weapons. This left areas of radiological hot spots, lakes of chemicals, and plaugues spread thoughout the U.S. I'm thinking of something similiar, however I want to the Russians (or other antagonists) to have already invaded the US. This would create a large group of enemy NPCs in the game world (which is also useful for blocking certain areas off from players.) As well as adding mission fodder.