I read about this today and thought it might prove to be interesting.
http://www.ishallremain.com/
An active-duty US Marine used his savings to create this post-apocalyptic zombie RPG which features not only zombie killing, but leadership challenges. The protagonist is a Marine Captain who has awoken in an infected city. I am not sure if it is available yet, but it looks interesting and the article that I read today claimed that it would cost less than $10.
I Shall Remain
I Shall Remain
"A man may die yet still endure if his work enters the greater work, for time is carried upon a current of forgotten deeds, and events of great moment are but the culmination of a single carefully placed thought." - Chime of Eons