Now this bugs me a little.
Its what?, 4 or 5 different areas? in total?, im not sure how this demo is going to come about myself. You can give the player a level to try, like the city one weve seen a lot of, and whilst the a.i and director engine will make every demo experience different, by the time the levels over they will have experienced a 5th or a quarter of what the game has to offer.
maybe it will be in one barricaded building and one stand off to survive or just a set 15 minutes of gameplay which pisses me off. but its a good way to give you enough.
honestly i dont know, but im a long time fan of zombie films, novels and games so im sold from the first minute after i heard the premise, but this doesn't seem like a demo-able game to me.