ZombieMod takes a unique approach on the Zombie Apocalypse by putting it in the perspective of a military commander, not a survivor. Since it is 2 years after the first infections, resistance on the east coast is organized, resulting in battles rather than small groups fighting for survival.
This video accompanies the article posted.
Here you can see some of the survivor infantry in action. Not all units are shown, but you can get a good idea of how they work ingame.