Sheer BLOODY brialliance
Graphics - Man, the amount of detail put into the zombie models, step above most zombie games. You really did want to shoot them.
Style - Loved the whole backed into a corner feel of the game, survivors even had the ragged look you see from most people in the zombie movies.
Sound - The zombies didn't make much noise, and probably some hardcore music would have set the mood once things started getting bloody. Quiet during the searching, then have music gradually build up as the horde staggers up.
Violence - Heads exploding, nuff said.
Interactivity - Very smooth, the aim seemed a little off at times, but not too bad.
Humor - The clown zombie was quite unexpected.
Overall - Best zombie defence game out there in my opinion.
Cheers, make some more.