Name This Videogame (difficult question)

Aug 6, 2017
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Around 2005 I remember playing a computer game that I cant recall the title of.
4 players
Ai computer teamates
Ai enemies
Enemies were beige spiders who walked backwards and huge larva bugs that gave birth to more spiders
When a spider came into contact with a purple flower, it changed it into the pregnant larvae
The player could squash the flowers
There were plasma grenades
and different weapons, like lazer, and flame thrower
The spiders fell from the ceiling at indoor levels
There were power suits that I remember that made your gun stronger
It was birds-eye view and maybe 16 pixel characters
There were captain-insignia-looking medallion things you could pickup that would call in robots to help you, or reinforcements, or airstrikes too (i think)
It got so much harder as you went through the game, the first three levels were outside, then you got to a survival at a building level, then an inside of the building level, then a partially underground level, then a level in an underground bunker where you had to protect a crystal (i think)
Dying soldiers had a memorable dying noise
When you or your teamates died, you needed to wait for the level to end
If everyone died, you could either continue if you had enough merits or got kicked to the title.

I think it was Warzone then some numbers
or war #s
or soldier #s
or apocalypse #s
I cant remember. My family, friends, cousins, and I have been trying to find the answer for years. PLEASE HELP! It was SUCH a good game