Areas
7 changes in this update
Armed response - the bigger your horde, the harder the town fights back: police past 60 zombies, SWAT past 150, the army past 250
Police car, SWAT van and army truck - drive in along a road, park where there's room and drop off their squad
SWAT - riot police in body armour, with their own lines
Squad bounty - turned squad members are worth triple brains
Sirens, a bugle call and car doors - you hear a squad before you see it
Spawning - new humans come out of the door with the fewest zombies outside, so a big horde can't camp the doors
Late game - squads scale with your horde's bite and health, so they stay a threat however far you've upgraded