I played this game back on Armor Games and damn! I never liked anything related to zombies but I finished this game twice! One of the best and most realistic flash zombie games ever! HOWEVER the story should be longer and thing I didn't like is how you get five to six assault rifles, SMG's and shotguns in the very ending of the game, you don't even enjoy them enough. For instance I got M16, M4, K-SCAR, another assault rifle, Ambrose Shotgun, a very rare SMG, a katana and Kevlar armors on the military base.
Also, your companion should run with you on the last part of the game and not try to hold them up. Luckily I kept with him. And the worst thing is the ending, which I found obvious... but those minimal details took nothing but half star for my short review. The soundtrack is really cool, especially on the siege moments (the first time, on the house, I got like WOW!), realistic gun fires, you learn a thing or two about weapons. 9mm's can be used on SMG? I hope that on real life it does too.
Excellent game!