Good game, except the times when it starts with 6 fat runners all weilding macheties. They killed everyone, and then proceeded to kill me as well. :( 31 days, 994 zombies.
Man those military zombies were a pain! I actually lost my wall on day 19, but managed to survive 20 days and got the sniper badge and survivor badge as well.
The tower AI is not good enough. They do not target the creature closest closest to the exit, which caused me to loose on the 4th round. Not good at all.