Did it in 29 days, 1084 zombies slain
It got damn hard at the farm level, took me ages, so long, and i went from 3 others to just 1 other, and then i barely made it still, i was fighting by myself for most of that level because my barricades were only 10 and i fergot to repair them.. so i stayed at the next level where you find the grenades, and did it in 3 tries..
it was alright, but it's randomised, there were fat zombies with swords that still ran, and they attacked with claws and not the weapons? could've also made an optional minigame where you can get weapons from fallen zombies, but only in 5 seconds, and only if there were zombies with weapons like the sword on the floor dead./
Still, it was allright. pretty lame ending, too.. you could've showed a small cutscene where you and the other survivors, if any, went away from the city by helicopter, plane, boat ect..