It really needs some sort of checkpoints... I got all the way to the level with the city (on hard), and i got 199... :( Sucks to start all over again...
Level 12 was really hard, but I finally managed to do it.
If you are having problems, try to focus on taking the cells of your enemi, and not the empty ones.
There are only 2 problems with this game.
Nr. 1: The fast zombies are too fast. They ruin the fun when they reach the wall, 0.5 seconds after they first appeared...
Nr. 2: The other survivors suck... If you are lucky to get one, they most likely die the first night.
4/5
 "Feudalism"){kind=icon}
 "Doeo"){kind=icon}
 "Duck, think outside the flock"){kind=icon}
 "Nano War"){kind=icon}
 "The Last Stand 2"){kind=icon}
 "Age of War"){kind=icon}
 "Kongai Launch"){kind=icon}