Armor Games

I actually tried to do this, and I found that you can beat the first two campaigns easily with only the cannon :P
After the first two or three waves it can destroy nearly anything in one shot, and by the end you should be able to destroy a warship in one hit if you hit it in it's weak point.

if your good with the cannon...you can use it like a scalpel

easy easy....
make one barrier decoy, in the front.
then make a spread machinegun/ dual machine gun
dont upgrade health for the gun at all, only damage
and a damage buffer
if you have open places, you can make a fire rate buffer/2nd damage buffer
with this combination, you can finish any level
for insure, you can make those automatic operating balloons(auto airship/decoy drones) for incase your gun damage is too low to kill heavy shielded ships. but these usely come late in the level, and then your gun is high upgraded enough to do damage.

well, the best power combo is one tri-machine gun and then a mix of damage buffers and rocket launchers.  The rockets will still home in on your mouse even when you have switched to the triple machine gun, so you could concievably just sit there with 20+ missiles like someone has already said in this thread but also have the triple machinegun killing stuff.  Now, wait... I think triple machine gun is EC only for 1.5, I was thinking lost campaigns... Ok, just go with the double machinegun because it has 360 degree rotation and it's almost as good as the triple machine gun... now, ONLY upgrade damage for your weapons... that's all there is to it, get a machine gun and rockets and a damage buffer or two and then just upgrade their damage, and you've got yourself one powerful combination right there.  On the last campaign I did on LC I was hitting I think tens with my triple machinegun and the rockets were killing all sorts of crap, the only problem is with the aiming, as if you put your cursor directly on the enemy to shoot them, you will waste a rocket or two.  Also, the main reason I include rockets is that some enemies are not vulnerable from the front, so you need to get your rockets in behind them in order to get past their armor.  Well, that's all I have to say, just machine gun and rockets... now, have fun with an extremely easy game, since this combo takes all the fun out of it... =D  and, I was disappointed with the minigun... It sucks hardcore.

cool

-kicks alpha into the sky- really. this is another neo today >.<