Fire vomiter

Acid zombie

Burning zombies

Acid Surveyor

as Suicide Bot kamikaze

Explosive Surveyor

Red Queen Mechanical Tentacles

there three Variant of it

one is Claw

second is Sharp Spike

third is Blaster Laser 

Drowned zombie dog

Drowned striker

Drowned licker

Burning, Acid, shocking Gonome

Military Zombies

They sometimes Carrying Guns such as Smg, assault Rifles , Shotguns, Sniper rifles, and Rocket Launchers or Rpg, and pistols (which means is good)

they can carrying Weapons on their Back, on their legs or Hanging off With Straps on the Weapons

Elite Licker

it had horns on it head

Shocking and Burning Hockey

Frozen zombie, licker and dog
They can be frozen in winter like during blizzard and snow storm
But they still active while they frozen as statues
You break their heads easily to kill
Also the cold winter can slow them down

Frozen Strikers

Drowned zombies

Shocking Zombie

Spiky Zombie

Ivy Striker

Ivy Licker

Ivy Zombie Dog

Hydration Zombie is carrying Water Bottles, Water barrel, you shoot at water barrel it leave Puddles of Water

Casustic-x zombie is Hazmet Zombie carry with portable Tanks with Acid in it

when the tank is damaged it will leak acid and can potentially explode

And last ivy floating is podder

Umbrella Robot Wolf

some them are carry laser Gun

Putrefied Vomiter

that has the ability to vomit Blobs of bile that stick to surfaces and explode

these blobs attach to any surface and explode when player walks near them.

bile blobs can balso be found in environment when no putrefied vomiter is present ultrasonic Zombie

UltraSonic Zombie

is carry speakers

when it roars it will blast ultrasonic into Speakers Causing your ears to pain

Ultra Sonic surveyor

it carry speakers as Weapons

it will Blast Ultra Sonic through speakers causing your ears drums to pain

Mutators are notable for first appearing as super undead. They can be identified as  black eyes, mess up face, men with green pants and blue tank top. When alerted to the player's presence or through a nearby loud noise, Mutators will mutate into large abominations. They will grow several feet taller, their chest cavity will open up and their left arm will sprout a large sharpened bone club. During this process, Mutators will be invulnerable to damage, giving players a few seconds to gain some distance. Once the transformation is complete, Mutators will rush the player and attempt to strike them with their club arm. If the player is far enough away from them, they will shoot bone shards from their chest cavity that will cause the Bleed status effect.