Im not sure, but i think that every house is diffrent. If you go to that house you'll need that much defence and search points. Pick out an house, and go to survivors, there should be requirements on the search party (4/7 2/6)
...I just got a weapon named "undentified"... But im glad i somehow got it, it now stands "NaN" In my inventory, so now i can carry as much stuff as i want! Is it a glitch?
Why couldn't you have made an whole survivor group of your own? Maybe added more city's... And please... Give it a more "city in war" feeling, military firing at zombies, not only when they are holding position on the same place where they stood basicly in the whole game. And add vehicles, helicopter's, car's, plane's? Update it or make an number two... Pleeeeease!
It's in full version, follow the link inside the game.