this is a addon based off of the game Half Life 2
there is a lot of stuff in this addon, and this is probably the most well made and best addon I've made yet
I'm extremely proud of  this addon and its something I think people would enjoy a lot
(this addon is not done yet, there is still a lot I need to add)

Antlion Nests can spawn Antlions
Antlion Nests can spawn in caves/under trees

  spawns:
-Antlion Soldier
-Antlion Guard

Antlion Soldiers can jump high, and cant take fall damage
Antlion Soldiers can spawn on beaches
Antlion Soldiers are tameable with Raw Headcrab
there are four different skins of the Antlion Soldier

antlions will attack Combine, Zombies, and Humans

Antlion Workers can jump high, and cant take fall damage
Antlion Workers are a ranged attacker
Antlion workers can spawn on beaches

antlions will attack Combine, Zombies, and Humans

Barnacles will attack Combine, zombies, and Humans

Antlion Grubs dont do anything, they are just there
they drop health

Headcrabs are bug like creatures from Xen, like the Antlions.
Zombies come from the Headcrabs

Headcrab Chambers can spawn headcrabs
can spawn around your world

  spawns:
-Headcrab
-Fast Headcrab
-Posion Headcrab

Headcrabs can leap at you from about three blocks away
when they kill a human, the human will transform into a HL2 Zombie
when it kills the Combine Soldier two, the Combine Soldier two will transform into a Combine Zombie

Headcrabs will attack Combine, and Humans

  drops:
-Raw Headcrab

Lamar headcrab works the same as the Headcrab, but it is friendly
you can tell by how lamar headcrab has no beak

  drops:
-Raw Headcrab

Fast Headcrabs can leap at you
as their name implies, they are fast, extremely fast, its hard to get away from them
when they kill a human, the human will transform into a Fast Zombie

Fast Headcrabs will attack Combine, and Humans

Posion Headcrabs can leap at you from about three blocks away
if you punch them, they will run away for about 3 seconds
they can also ride on the Posion Zombie
when they kill a human, the human will transform into a Posion Zombie

Posion Headcrabs will attack Combine, and Humans

HL2 Zombie can break doors
when it dies, it can become a Crawler HL2 Zombie
when it dies by fire, their dead bodies will be burnt

HL2 Zombies will attack Combine, and Humans

works like the HL2 Zombie, but slower and weaker
this one can not break doors

HL2 crawler Zombies will attack Combine, and Humans

Fast Zombie can break doors, and can climb, and of course by the name, its fast, very fast
when it dies, it can become a Crawler Fast Zombie

Fast Zombies will attack Combine, and Humans

works like the Fast Zombie, but slower and weaker
this one can not climb
and cant break doors

Fast Crawler Zombies will attack Combine, and Humans

Posion Zombie can break doors, it also spawns with a posion headcrab on its back
Posion Zombie can hold up to 3 Posion Headcrabs on its back

Posion Zombies will attack Combine, and Humans

Zombine can break doors
will explode after 10 seconds
pretty much the same as the HL2 Zombie
you can light them with a flint in steel
you can light them up with a flint in steel on their dead bodies

Zombine will attack Combine, and Humans

Combine Portal will summon Combine entities
Combine Portals can spawn around your world

things it can summon:
-Metro Police
-Prison Guard
-Overwatch
-Soldier two
-Soldier
-Elite

-city Scanner
-Manhack
-Combine turret
-the Strider

-Combine Gunship
-Combine Dropship
-Combine Hunter-chopper
-Combine Prison Transport
-Combine  Armored Personnel Carrier

-Combine advisor

Metro-Police are a melee ranged attacker
they hold a stun-stick

Metro Police will attack Zombies, Headcrabs, Antlions, and Humans

  drops:
-Stun-stick
-Small Med-kit

Prison Guard are a ranged attacker
they hold a Shotgun

Prison Guard will attack Zombies, Headcrabs, Antlions, and Humans

  drops:
-shotgun

Overwatch are a ranged attacker
they hold a Shotgun

Overwatch will attack Zombies, Headcrabs, Antlions, and Humans

  drops:
-shotgun

Soldier two are a ranged attacker
they hold a SMG

Soldier two will attack Zombies, Headcrabs, Antlions, and Humans

  drops:
-SMG

Soldier are a ranged attacker
they hold a Pulse Rifle

Soldier will attack Zombies, Headcrabs, Antlions, and Humans

  drops:
-Pulse Rifle

Elite are a ranged attacker
they hold a Pulse Rifle

Elite will attack Zombies, Headcrabs, Antlions, and Humans

  drops:
-Pulse Rifle

The Strider are a ranged attacker
it can shoot at you from a far distance

The Strider will attack Zombies, Headcrabs, Antlions, and Humans

Jeep, you can drive it