......but they are also cheap as balls .......

It's of such quality because the game is of such quality.

that dude is doing other things now

I always get screwed by snipers, too damn good.

Hooray for airstrikes, artillery, mortars, and all other flavours of NLOS weaponry.

............................................................

Zombies can shoot?!?

......

Hhmmmmmmmmm

Perhaps you could try to increase the excitement by giving zombies certain specialties, but not by giving them guns and taking the fun away of hitting "zombies."

The aforementioned "specialties" may include some things like ..... ugh gee I dunno,
-zombees (get it?! zombie bee swarms!!) (perhaps modify the nanoswarm of techion, but they should be able to get shot down by guns or flamethrowers),
-exploding fat zombies (coz obviously),
-acid spitting zombies (perhaps modify concrete sprayer but with short durations and some damage),
-high jumping zombies,
-a dark "hunter" (inspired by hunter from Left4Dead),
-zombie slime/blob humanoid (aka liquid zombies) (guns do not harm them, only explosives and fire can kill 'em)
-trolling trap zombies (lies there like a normal corpse, its health bar is hidden so is nearly unnoticeable, then when the player comes near it jumps and scratches/bites)
-rage zombies (zombies that speed up and strengthens the more damage it takes until its health depletes)
-hormone zombies (zombies that emits a strong regenerative hormone into the air hence healing nearby zombies and/but (so I really dont know if it should heal itself or not as I can't weigh the balances in this one) itself)
-boners (LOL) (zombies that mutated a strong exoskeletal bone suit (perhaps just modify the skeleton actor for this one) that can minimize bullet damage, but more vulnerable to explosives (so you can kill it anyhow))
-freakin fat omg huge zombies (aka FFOHZ, coincidentally sounding like a zombie's roar) (zombies that can take tons of damage, and will not die unless its health depletes, which its health constantly decreases in a timer-like rate even when it is not taking damage, hence the prime defense strategy against this type of zombie is to fly and run, adding a little "escape fun")
-climbers (to counter and discourage players who wall up on a ... wall, and neva comes down) (should not be too strong)





i really liked your idea of putting the They Hunger zombie bots (which are super interesting and challenging) and also the limited ammos (very realistic)
Other touches to increase the realistic atmosphere can be: the fog of war (wait, is it used?); and (though I mentioned this) no more gun zombies. give them melee weapons, but not of anything that needs intelligence (which rules out guns, grenades- maybe they can throw bricks? give them cleavers? u decide, my man)


but all in all, all is well - imma gonna download this as soon as the gun zombies go away
sharing some ideas.

... suggestions are samey on the undead front.