Good game, very fun.
It was a good game, quite fun. But in response to the last guys comment about "Realism". Bullets do not knock back anyone in real life....they rip, and pierce. so that made you look un-qualified to even comment on it when you said it was realistic because the zombies got knocked back.
I think if you want more Realism, Guns with more stopping power such as shot guns and Magnums should knock enemies back, as magnums have heavier slugs and the knock back would demonstrate their awesome power. Small arms and rifles just pierce, there should be no knock back.