a quick walktrhough: first of all, headshots,quite important at the beginning, gives you double the time if you shoot them in the head, for searching, first look for more survivors,more important then guns or other stuff in the beginning, get your search party full(normally by area 2 you should have it easily full,i got 12 survivors by then),after you got your search party full asign the rest to defending (don't forget to look at their stats,where they suit best). after that it's just a matter of time before you find the machinegun,when you got that you can easily kill them all, don't forget the headshots, they're still good at the end of the game.
 "Dead Zed"){kind=icon}
 "Cargo Bridge: Armor Games Edition"){kind=icon}