game mode without nukes or endless zombies from the outskirts would be nice.(extinction) Have random outbreaks, lots of people, and one group of like 8 cops in that mode. 4/5, but needs a little work to become 5/5.
here's a custom challenge:try to survive 10 says,250 day time,750 night time.999 energy and smog. no other resources. Map 1 with top turned on, the rest off. 5 spawn time, 0 spawn rate, 1 increase time, 1 increase rate. betcha cant do it. this would be awesome with a level editor.