Since it was brought up, if you want a great zombie RPG I suggest that you look up Year of the Zombie. It's designed to be used with Wizards of the coasts D20 modern rpg book.
There are a large number of source books available for it, and two adventures as well.
http://www.rpgnow.com/ind...manufacturers_id=386Personally, I ran the game for about 6 months, and it was fun. The rules were a bit quirky for my taste, as I honestly prefer to run more realistic type games (GURPS, perfect for the level of 'realism' you want to employ).
I digress....
Also, several times I've mentioned that I've edited RPG books. They're the Darwin's world campaign, something that any Deathlands fan would enjoy. I've edited quite a number of the books.
There are a HUGE number of books available for it most of them being adventures.
http://www.rpgobjects.com/index.php?c=dwFinally, I've been working on writing adventures (one complete in the play test phase), and I've been working on an 'advanced' rule book for a old school game called Mutant Future. It's essentially the 1st edition Gamma World rpg.
I have no idea if or when the adventure will be published, but the owner of the company was quite keen to get his hands on some material.
http://www.goblinoidgames.com/mutantfuture.htmlBest part of Mutant Future is that the PDF is free.
So, there you have it. I have spoken numerous times about RPG's and now I've got the links and data up for those of you who are actually interested.
Chris