HERE a strategy
open the swamp and all the doors after untill u reach the minecart.
DONT OPEN THE other side of the spawn.
DO this when u got good guns.
two players stand with their back against the door and shoot the pyle
one has to cover the window on the pap right side.
THE napalm zombie blows around the corner so wont hurt anyone.
the shrieker gos in line like the rest, and so do monkeys.
power ups are easy to retreave