Human Classes:
Default Survival ( 0 XP )
Weapons: Pistol Silenced, Shotgun.
Skill: N/A
Immunity: N/A.


Police Man ( 500 XP )
Weapons: Desert Eagle, Shotgun.
Skill: N/A
Immunity: N/A.


Medic ( 1.000 XP )
Weapons: Silenced, Shotgun.
Skill: /cure infections
Immunity: N/A.


Scout (1.500 XP )
Weapons: Silenced, Sniper .
Skill: 4 hit 1 kill with Sniper.
Immunity: N/A.


Ranger ( 3.500 XP )
Weapons: Desert eagle, AK-47.
Skill: N/A
Immunity: N/A.


Heavy Medic ( 5.000 XP )
Weapons: Desert Eagle, Shotgun, M4.
Skill: /cure infections /heal ( 5 HP )
Immunity: N/A.


Soldier ( 6.500 XP )
Weapons: Desert eagle, AK-47.
Skill: N/A
Immunity: N/A.


Farmer ( 7.000 XP )
Weapons: Desert Eagle, Ak-47, Rifle.
Skill: N/A.
Immunity: N/A.

Engineer ( 8.500 XP )
Weapons: Pistol Silenced, Shotgun.
Skill: Can build 3 Box
Immunity: N/A.


Sheriff ( Rank 10 )
Weapons: Desert Eagle, Shotgun.
Skill: N/A
Immunity: Default, Mutated, Screamer ( Rank 15 ).


Heavy Shotguner ( 20.000 XP )
Weapons: Shotgun.
Skill: 4 hit 1 kill
Immunity: N/A.


Advanced Medic ( 25.000 XP )
Weapons: Desert Eagle, Shotgun, M4.
Skill: /cure infections /heal ( 5 HP ) + Left alt for cure all humans near him.
Immunity: N/A.


Advanced Engineer ( 30.000 XP )
Weapons: Desert Eagle, M4.
Skill: Can Build 7 box.
Immunity: N/A.


Experienced Engineer ( 35.000 XP )
Weapons: Desert Eagle, Shotgun.
Skill: Can Build 3 ladder.
Immunity: N/A.


Pilot ( 55.000 XP )
Weapons: Desert eagle, Mp5.
Skill: N/A.
Immunity: Tanker, Advanced Tanker, Experienced Tanker.


Federal Agent ( 70.000 XP )
Weapons: Desert eagle, Shotgun, M4.
Skill: N/A
Immunity: Default, Mutated, Screamer, Heavy Screamer, Advanced Mutated, Witch, Advanced Witch, Experienced Witch.


Weapon Dealer ( 85.000 XP )
Weapons: Desert Eagle, Mp5.
Skill: Can give armour /vest, can give ammo /giveammo.
Immunity: Default, Mutated, Heavy Screamer, Advanced Screamer, Advanced Witch, Experienced Witch.


Advanced Scout ( 100.000 XP )
Weapons: Desert Eagle, Sniper.
Skill: Superjump.
Immunity: N/A.


Doctor ( Rank 22 )
Weapons: Silenced.
Skill: /cure infections /heal ( 40 HP )
Immunity: Default, Mutated, Screamer, Heavy Screamer, Advanced Screamer, Advanced Mutated


MIB ( 300.000 XP )
Weapons: Desert Eagle, Shotgun, Mp5, M4.
Skill: N/A
Immunity: Default, Mutated, Screamer, Heavy Screamer, Advanced Mutated, Witch, Advanced Witch, Experienced Witch, Flesh Eater.


FBI agent ( 600.000 XP )
Weapons: Desert Eagle, Shotgun, Mp5, M4.
Skill: N/A
Immunity: Default, Mutated, Screamer, Heavy Screamer, Advanced Mutated, Witch, Advanced Witch, Experienced Witch, Flesh Eater, Advanced Screamer


Shotgun Specialist ( 1.000.000 XP )
Weapons: Shotgun.
Skill: 2 hit 1 kill.
Immunity: N/A


Experienced Scout ( 3.000.000 XP )
Weapons: Silenced, Sniper.
Skill: Superjump.
Immunity: Default, Mutated, Screamer ( Rank 15 ).


Zombie classes:
Default Zombie ( 0 XP )
Weapons: Chainsaw.
Skill: Left alt near humans for infect.


Mutated Zombie ( 500 XP )
Weapons: Chainsaw.
Skill: Left alt near humans for infect + Drunk vision. -5hp every 3 seconds.
Skin:


Hunter Zombie ( 5.000 XP )
Weapons: Chainsaw.
Skill: Left alt for Superjump.


Reaper Zombie ( 10.000 XP )
Weapons: Chainsaw.
Skill: More Chainsaw Damage.

Witch Zombie ( 18.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Leave -45 HP to humans near.


Boomer Zombie ( 20.000 XP )
Weapons: Chainsaw.
Skill: Explode after dead.


Tanker Zombie ( 35.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Throw all around you -10 HP.


Screamer zombie ( Rank 15 )
Weapons: Chainsaw.
Skill: Left alt, Throw all around on floor.


Knife zombie ( 45.000 XP )
Weapons: Knife.
Skill: N/A.


Advanced Mutated zombie ( 65.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Infect all around you. -3 hp every 3 seconds.


Heavy Screamer zombie ( 75.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Throw all around on floor + 10 hp to you.


Flesh eater zombie ( 100.000 XP )
Weapons: Chainsaw.
Skill: Left alt near humans for infect + Drunk vision -10hp every 3 seconds.


Advanced Screamer zombie ( 250.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Throw all around on floor + 10 hp to you -10 HP to human.


Advanced Witch Zombie ( 400.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Leave -69 HP to humans near.


Advanced Tanker zombie ( 650.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Throw all around you + More distance -20 HP.


Burning Ashes ( 800.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Drop molotov bombs.


Experienced Tanker zombie ( 1.000.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Throw all around you + More distance -25 HP.


Experienced Witch Zombie ( 3.000.000 XP )
Weapons: Chainsaw.
Skill: Left alt, Leave -89 HP to humans near.


Shop:
Kickback ( 80 tokens ) : Throw a hitted zombie in the air.
Tec-9 ( 85 tokens ) : Give to you 100 ammo of Tec-9
Parachute ( 15 tokens ) : Give to you 1 Parachute.
Chainsaw (350 tokens): Give to you a chainsaw.

@SeV I thinked to make this topic just for do a list of all classes. If u don't like it you can delete.

Updated