Zombie style arcade shooter.

Further description of the enhancement:

-The idea is to have aliens spawn in large groups. Each alien will stay dorment 
until a marine gets within a certain distance of it. Then it will attack

-Marines will have a shortened firing distance and slower move speed.

-Normal spawners will be kept to a minimum to allow zombie hordes to be the 
main focus.

-Will come up with ideas to use ONE alien type as a boss.
Boss could be a fast shield bug or a couple of high health harvesters ETC.

-Mode should feel like you are mowing down hordes, but you have to get close in 
their face.

-Aliens will have a fast attack speed, but slow move speed.

-Aliens attack distance will be a decent portion (60%) of it's enemy sensing 
distance. So that they move slow at first, then pounce marines.

-Marines can't shoot very far so weapons will have to be powerful enough to 
maim zombies.

-Would be neat to adjust the way drones move, allowing them to move in slow and 
medium speed bursts toward the target. Making them unpredictable. They would 
move in a fast speed boost upon attack mode.

Original issue reported on code.google.com by jigonb...@live.com on 8 Jan 2013 at 1:06

jtanx / ch1ckenscoop

Zombie style arcade shooter. #95