In Depth: Xen Fauna

Llama

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As always, pointers / comments / critisisms (where necessary) valued :cheers:

In Depth: Xen Fauna

Wild Xenian Contents
a) Headcrab
b) Bullsquid
c) Barnacle
d) Houndeye
e) Panthereye
f) Snark
g) Leech
h) Tentacle
i) Ichthyosaur
j) Gargantua
k) Ant Lion
l) Myrmidont
m) Gonarch

Civilised Xenian Contents
a) Why Civilised?
b) Vortigaunt
c) Alien Grunt
d) Controller (Xen Master)

Wild Xenians

Headcrab - The Headcrab ranks among one of the most basic Xenian life forms. Small, parasitic aliens that scuttle along the floor at a slow speed. The Headcrab is a parasite by nature, and makes up for its slow speed with a considerable jump. It is unknown which life forms the Headcrab can use their parasitic abilities on. However, we known how these Xenians use them due to “Zombies”, unfortunately humans that have fallen host. The Headcrab jumps at the head of the victim and latches on by digging its four sharp claws into the front and back of the shoulder blades. It’s underbelly houses a wide, circular mouth containing a strong, sharp beak. The Headcrab uses this beak to burrow through the skull into the brain of the victim. Once this has occurred the Headcrab can slowly take over the hosts’ nervous system. Exactly how this is achieved is unknown, but following a “Crabbing” the hosts’ body mutates and loses most of its flexibility. We know that “Zombies” are primarily flesh eaters, but the Crabs natural diet is up to speculation, though it is most likely flesh.

Bullsquid - The Bullsquid is an amphibious monster, found in and around the rivers, ponds, and other wet areas of the alien world of Xen. They also have the infrequent tendency to hide in tight crevices. They are immune to radioactive waste. Bullsquid are approximately 2 metres in length, and its smooth skin is characterized by a deep yellow colouration with dark brown and olive spots, like those of a toad. The basic shape of the Bullsquids body is that of a squid, and has two cloven-hoofed legs, like those of a bull, hence the name. The Bullsquids front end has two large eyes, and multi-toothed mouth ringed by several long claw-tipped tentacles. This tentacle area is almost always very red, either from natural colouration or the blood of its last meal. The other end features a club tail tipped with a non-poisonous scorpion-spike. The Bullsquid can attack by biting its prey, or swinging its tail like a mace. However, it prefers to attack long-range, by spitting gobs of acidic green slime out of its mouth. These globs can easily travel medium range distances without a compromise in accuracy. Bullsquids are simple creatures that rely on power to take down their prey. They have two very simple driving influences, the need to feed, and the need to mate. If not mating Bullsquids will attack most other animals, including other Bullsquid. It feeds off humans, Headcrabs and other Bullsquids.


Barnacle - The barnacle is a slow-witted, immobile Xenian predator. Resembling a pulsating sac of ceiling hanging flesh with jaws, the barnacle uses its long, sticky tongue to wrap around and ensnare its prey. One anchored it is completely immobile, and therefore completely defenceless. However, anything caught in its tongue, unless it attacks the Barnacle and kills it, it doomed to be eaten alive. The barnacle is highly fragile, so it will therefore attach itself to dark, low ceilings while waiting for potential prey to pass by.

Houndeye - The common Houndeye or “Sound dog” is by nature a pack animal. It is rare to find one of these small, doglike animals alone, for alone they are shy and unhappy creatures. They are predators that can emit highly damaging sonic waves. These waves are produced by the growing neon crystals on the backs of the animals. These waves have a radius of several feet in any direction and can serious rupture the internal organs of most organisms in its path. Although they live in packs, this is mainly due to protection - They are predators, but are far to small to attempt an attack on a predator like a Bullsquid. The Houndeyes most unusual feature is its physical appearance. Although it is dog-sized, it only has three legs, two in front and one hind leg. Its skin is a striped greenish colour, and its entire head is made up of a single, large, black compound eye. When happily fed, the Houndeye is a relatively peaceful animal that will only attack during mating season or if it feels threatened.

Panthereye - The Panthereye first appears a much larger cousin of the Houndeye, but this is in appearance only. It is a territorial solitary hunter. It does not have the ability to emit sonic waves, instead it uses its incredibly strong back legs (The Panthereye is, unlike the Houndeyes, a quadruped) to pounce on its prey, tearing at it with the razor sharp claws on its arms. Its body is much larger then a Houndeye, and distinctly more proportional - The legs are longer, and it features a separate head. It is also a very dark shade of red. It is far more aggressive than a Houndeye, attacking on sight and only stopping when the victim is dead.

Snarks - Snarks are, unquestionably, the most irritating creatures ever encountered on Xen. Highly aggressive Xenian insectiod creatures, Snarks are spawned from birthing sacs which can contain up to five or six Snarks. Despite their small size the Snarks have a very nasty bite. Combined with their somewhat disturbing speed and miniscule body size, a group of Snarks can become a deadly threat. Due to an incredibly fast metabolism, a Snark can only survive outside its birthing sack for a minute at maximum in Earth conditions. However, it is speculated they can survive for several hours on Xen, long enough to reproduce. Snarks will attempt (occasionally failing) to eat anything, including full grown Gargantua. When dying, Snarks explode, taking the scenery with them.

Tentacles - Tentacles are the Limbs of large pulsating organisms that dwell far below ground level. Each “Tentacle” is a long and thin (but still enormous) green appendage ending in a several foot long beak. Each head seems to be granted its own primitive brain, and hunts for prey by sensing vibrations then smashing down with its huge beak. It then drags its prey down by means of a sucker below the beak, where it can feed on the nutrients produced by decay. Tentacles are almost invulnerable to most weaponry, certainly in the way of one man firepower. They posses incredible powers of regeneration, and cannot be killed unless the head is severed completely.

Ichthyosaur - The Ichthyosaur is a very fast and agile predator that bears more resemblance to Jaws than anything else. It shares the basic shape of a Great White, but with several differences. The first is its fins end in long stabbing claws. The second is that even though it is smaller than a Great White its mouth is far larger. Another difference is the feeding habits of the Ichthyosaur. Rather than rip its prey apart the Xenian fish attempts to swallow it whole. Ichthyosaurs are solitary hunters but can cooperate with other individuals in the search for food. They will eat anything, literally, that falls in the water and cannot drag itself out in time. It takes the Ichthyosaur about ten seconds to recognize that prey has appeared, but once that connection has been made the Ichthyosaur will concentrate on attacking until each it or its prey has died.

Gargantua - It is undecided whether or not Gargantua are naturally occurring aliens or whether they are produced in the Xen factories. Regardless, they are an incredibly powerful threat. Gargantua stand about twelve to sixteen feet tall, are coated in thick blue armour and see using a single red large eye. Each arm ends in a pincer shape that can (when opened) shoot a blistering steam of fire and plasma several metres in the direction the creature is aiming. If attacked in close range the Gargantua will swing its arms (The actual power of these blows can smash concrete and snap metal) or use its feet to crush. Stamping there feet can also, if perfectly times, released a shot of red energy that obliterates anything it hits. They are highly territorial animals that attack whenever they sense a non Xenian life form. The armour prevents bullets from damaging the creature. It can only be hurt be extremely powerful explosive or energy weapons. Fortunately, this armour seems to also restrict brain space, as this is not the most intelligent life form ever to evolve - far from it.

Ant Lions - Ant Lions are insectiod Xenians that resemble giant crosses between beetles and ants. Six legged with wings used for flying short distances, the Ant Lion attacks by using its two front limbs as spears to skewer whatever is unfortunate to disturb them. However, using machinery (called thumpers) to strike the ground produces vibrations strong enough to scare Ant Lions off. They live in colonies buried in soft soil or sand. Whenever something touches the ground the Ant Lions sense the vibration, bursting through the ground and attacking as one. They share a hatred towards other Xen fauna, in particular Headcrabs and Bullsquids. They can be prompted to attack or resist attacking through the use of Aromatic Spores. Ant Lions are typically a dirty yellow colour but it varies depending on the terrain of their habitat.

Myrmidont - The Ant Lion Guard, or Myrmidont, is an enormous relative of the Ant Lion family. They do not posses the ability to fly but make up for it with enormous size and great power. A muddy brown colour, Myrmidont are six legged and partially covered in armour plating. While not as tough as, say, the armour of a Gargantua, it is extremely resilient. The armour is thickest on the head, which the Guard uses to smash bones as it charges. When standing a Guard is over seven feet tall, and can gallop at upwards of twenty miles an hour. Each Guard possess spores grown inside the body to control the lesser Ant Lions. Like its smaller brethren, it shares a hatred for anything that intrudes on its territory. Unlike Ant Lions, Ant Lion Guards are not put off by thumpers.

Gonarch - Gonarch is a rare creature (or it may have been a completely isolated creature). It appears to be a gigantic armour plated Headcrab, towering at least three times the height of a man. Under belly is slung a huge birthing sac that spawns its young. It can throw corrosive balls of acid by spitting or striking with its huge legs (each leg has several spikes protruding from it) With the exception of the birthing sac it is completely invulnerable to weaponry. It is almost certain that the Gonarch did not grow from a normal Headcrab, for size difference is to enormous to contemplate. It is also far more spherical in shape with a higher profile. It even charges rather than scuttles. When it takes enough damage and dies the body of the Gonarch spasms violently before exploding, releasing up to fifteen young Gonarch.

Wild Xenians
Why Civilised? - The Xenians In this class are called “Civilised” for many reasons, explained here:
They have a clearly defined social structure that follows guidelines not set by evolution. They, like humans, can communicate emotions and there own thoughts using speech. They can engineer great structures and have a complex culture. They can even change their own bodies through production growth.

Vortigaunts - These creatures occupy the lowest parts of the Xen hierarchy. Bred for loyalty and chained for obedience the Alien Slaves (or Vortigaunts) are the slaves of the Xen race. They are forced to perform all the manual labour and are the servants to the more powerful Grunts. They are controlled by Controllers, and they can communicate using telepathy. The Alien Slaves are actually the most powerful members of the race and equally as intelligent as the Controllers which oppress them, but are kept in toe and unquestioning by the so called Slave Collars. If a Slave tried to disobey the collar would cause it unquestionable pain. They attack by generating electricity that they fire from their hands.

Alien Grunts - grunts are the backbone of Xen’s armies. Born and grown in containers, grunts can be produced in large numbers in a very short space of time. Their bodies are partial covered in an exo-skeleton of metal and a wasp shorting ‘hive hand’ is attached to the left arm. While the Grunts are still chained by the Controllers under their direct control, they can make their own basic free decisions, and they are not punished for not following direct orders, meaning that they occupy a higher position in the hierarchy, similar to that of a medieval knight.

Controllers (Xen Masters) - These creatures occupy the higher tier of Xen. Flying thin humanoids with abnormally large skulls, they posses the ability to launch balls of yellow plasma from their heads or their hands. They are the most intelligent of Xenians with the most diverse use of both telepathy and speech.
 
A few things:

-The Mymidont's spores are actually Pheropods.
-Houndeye's eyes are black.
-Gonarchs are confirmed to grow from baby headcrabs at a rate of one every couple hundred spawned.
-I don't remember seeing grunts ever being controlled by controllers.
-You forgot Nihilanth, Race X and the Chumtoads. (although forgetting the chumtoads is understandible.) :P

Otherwise, kickass and accurate short descriptions. Would you consider donating these to the HL1 Fact File?
 
his tentacle area is almost always very red, either from natural colouration or the blood of its last meal.
That struck me as very familiar. hmmm...

-Gonarchs are confirmed to grow from baby headcrabs at a rate of one every couple hundred spawned.
When?

And what makes you think that a panthereye is related to a houndeye.
 
I asked AL :E
I knew the spores were Pherapods, just couldnt be botherd to spell it :p
The Grunts wear chains, if im not mistaken, but im not to sure about that.

Race X arnt Xenians, are they? :p

Edit:
Mechagodzilla said:
Would you consider donating these to the HL1 Fact File?
Possibly, and i did take the Bullsquid and Houndeye segments from the factfile anyway - not word for word thought - (Riomhaire gets a cookie for noticing) but the rest i might put in, yes
 
The only thing really squidlike about the bullsquid (besides the name) is the fact that it has tentacles around it's mouth. It doesn't have a beak, it has a mouth with teeth. It doesn't have a mantle and fluted tail, it's got two legs and a clubbed tail.

I don't find the zombies to be entirely stiff. I think the stiffness comes from other possibilities. Perhaps the crab is not entirely connected to or in sync with the ambulatory system of its host because it's a recent catch? The zombies in OF, which were theoretically more mature as the mouths on the chests were fully functional, were not stiff, and indeed, the fast zombies aren't stiff (although they are from a different species of crab). The zombies from HL1 were slow, but I didn't gather that they were stiff per se. The zombies in HL2 limped, but I didn't gather that they were otherwise stiff.

Unhappy houndeyes - I don't fathom that from the game, and, indeed, their behavior belies happiness (to me) in the way they jump and chirp. Maybe they're happy because they finally found some prey? Maybe they're jumping and chirping because they are notifying the others that they found a bite to eat. When fed, it won't attack?

Snarks are probably not insects. First, they are not of this earth and second, I thought I only saw four legs on them.

I thought the mouth was the end of the tentacle but I could be mistaken about this. I figured they killed whatever they could by hooking or smashing the prey and then consumed it with the little tentacles and gray "mouth" that hung down from the bottom of the claw (although we did see a tentacle grab a scientist and drag it into the chamber never to be seen again....)

Otherwise, a very charming bit. Forgive me for never having visited the HL2 wiki, but is there something along these lines there?
 
Why you post Panthereye? Its not in any official HL. Only in expansions!
Categorize Antlions and Race-X to Xen creatures is really questionable...

btw My document about HL lifeforms (only in Czech language) - but you can see pictures ;)
 
Did he include Race-X creatures? I may be confused here...
 
No, i didnt post Race X, yes actually Bullsquids do have a beak, and I posted Panthereye because i wanted to, Snarks are insect-like creatures, not insects. And tentacled feed like i described, as seen in the Scripted Scene in Blast Pit
Angry Lawyer! You told me they were related! TRAAIIIITTTOOORRRRRR!!!! *bursts into tears*
 
No beak on the bullsquids - coincidentally, I took a gander last night and looked right into, what, eight teeth? I'll grab a screenshot and post it if somebody shows me a quick and easy way.
 
Well bugger me sideways, you're right :o Sorry and all that
I SWEAR the last time i checked there was a beak (last time was on my old HL, not steam)
 
I remember being kind of spooked the first time I saw the body of the tentacle, that living root-thing. Until that point, I thought the tentacles were, well, like trees with an attitude.
 
Polaris said:
Why you post Panthereye? Its not in any official HL. Only in expansions!Categorize Antlions and Race-X to Xen creatures is really questionable...

btw My document about HL lifeforms (only in Czech language) - but you can see pictures ;)
Are you SURE you don't mean in mods? I never saw a single Panthereye in OP4 or B.S.
 
TollBooth Willie said:
Are you SURE you don't mean in mods? I never saw a single Panthereye in OP4 or B.S.
Read this again! Its not in any official HL!
 
The Panthereye was originally concepted and pretty much developed for HL1. It existed in their alpha builds, and had some really awesome sequences where it would pounce on a Scientist and knock it off the edge of a catwalk. It's pretty official by my standards.

-Angry Lawyer
 
Angry Lawyer said:
The Panthereye was originally concepted and pretty much developed for HL1. It existed in their alpha builds, and had some really awesome sequences where it would pounce on a Scientist and knock it off the edge of a catwalk. It's pretty official by my standards.

-Angry Lawyer
Its same thing like Kingpin, Hydra, Cremator, Synth Soldier, Chumtoad, Antlion King, Prowler...
 
I'm sure you have a point somewhere, but I fail to see it.

-Angry Lawyer
 
...that they are all part of alpha builds that never made the actual game, I think.
 
...And why does that make it wrong for Llama to write about them?

-Angry Lawyer
 
Angry Lawyer said:
...And why does that make it wrong for Llama to write about them?

-Angry Lawyer
For God sake, its all right...
 
IM confused....
Anyway, if I do Kingpin, would it go with the ALien Slaves and Grunts? Or wild Xenians?

Is the Hydra a Xen alien?
 
Llama said:
IM confused....
Anyway, if I do Kingpin, would it go with the ALien Slaves and Grunts? Or wild Xenians?

Is the Hydra a Xen alien?
Kingpin was an inteligent creature. I'd say just leave it out. If you did put him in you'd have to choose which version to use aswell.
 
The Kingpin was an intelligent alien, apparently, but it doesn't seem to be genetically similar to the standard Xenians. Its probably safe to assume that they (would have) worked together though.

Kingpins are great. In the HL1 version of Conquest: City 17, they were incredibly hard, using telepathy to throw the human grunts around. Ohh yuss.

The slug Kingpin was the one they were going to put in-game.

-Angry Lawyer
 
Quite informative, although I'm no closer to knowing what the hell a panthereye is. Frankly, I highly doubt they're going to add them in at this point anyway, so what's the use in pretending they exist in the HL universe?

You made too many assumptions. There's no way in hell that those fish can be native to Xen, because there's absolutely nothing for them to prey on. A better guess would be that Nihilanth brought them from their original planet to use as pets/guards. No aquatic species could survive by waiting for prey to fall in the water, especially not one as large and active as the fish.

I seriously doubt the Gargantuans are native to Xen either. It's highly unlikely a predator of that size would evolve when it's biggest prey is a Bullsquid. Hell, even if one DID evolve, it makes no evolutionary sense to have armor plating or plasma-shooting hands or the red ground laser thing.

Still, good work. But I'd suggest trimming some of the speculation if you intend to post this somewhere more official/permanent than a forum.
 
safetyswami said:
You made too many assumptions. There's no way in hell that those fish can be native to Xen, because there's absolutely nothing for them to prey on. A better guess would be that Nihilanth brought them from their original planet to use as pets/guards. No aquatic species could survive by waiting for prey to fall in the water, especially not one as large and active as the fish.

I seriously doubt the Gargantuans are native to Xen either. It's highly unlikely a predator of that size would evolve when it's biggest prey is a Bullsquid. Hell, even if one DID evolve, it makes no evolutionary sense to have armor plating or plasma-shooting hands or the red ground laser thing.

Still, good work. But I'd suggest trimming some of the speculation if you intend to post this somewhere more official/permanent than a forum.

How do you suggest sharks have survived for over 300 million years?
Xen is a big place, room for everything.
Same for the Garg. Who says its biggest prey is bullsquid? For all we know, it could feed on Antlion Guards. Again, however, we havent seen enough to know for sure. There could be a wider variety of life on Xen than on Earth. But yes, i made a lot of assumptions
 
havent you read what the Author of half-life said? There are no orgin animals of XEN, XEN is a boarder world, a "pass" between the universe, and all sorts of aliens accross the universe has traveled through dimensions and got stuck in the middle-XEN, so hundrens of thousens of Aliens of different planets has been stuck in the trap we know as XEN. Now HUMANS is a part of it to...and the combine use it to counqer and find new worlds
 
Ravioli said:
havent you read what the Author of half-life said? There are no orgin animals of XEN, XEN is a boarder world, a "pass" between the universe, and all sorts of aliens accross the universe has traveled through dimensions and got stuck in the middle-XEN, so hundrens of thousens of Aliens of different planets has been stuck in the trap we know as XEN. Now HUMANS is a part of it to...and the combine use it to counqer and find new worlds

No, the Combine don't use it to conquer and find new worlds. They don't control Xen, and aren't on Xen (In my opinion) see: http://www.halflife2.net/forums/showthread.php?t=91660. Whats more, there are most likely some native xen aliens, but whether we've seen them or not, is uncertain. And how are humans part of it? Unless your referring to the dead bodies of BM personnel, or are you insinuating that some humans got sucked up through the portal storms?
 
Ravioli said:
the combine use it to counqer and find new worlds
Whatever you do from this point on, i will never listen to you again :hmph:
 
safetyswami said:
Quite informative, although I'm no closer to knowing what the hell a panthereye is. Frankly, I highly doubt they're going to add them in at this point anyway, so what's the use in pretending they exist in the HL universe?

You made too many assumptions. There's no way in hell that those fish can be native to Xen, because there's absolutely nothing for them to prey on. A better guess would be that Nihilanth brought them from their original planet to use as pets/guards. No aquatic species could survive by waiting for prey to fall in the water, especially not one as large and active as the fish.

I seriously doubt the Gargantuans are native to Xen either. It's highly unlikely a predator of that size would evolve when it's biggest prey is a Bullsquid. Hell, even if one DID evolve, it makes no evolutionary sense to have armor plating or plasma-shooting hands or the red ground laser thing.

Still, good work. But I'd suggest trimming some of the speculation if you intend to post this somewhere more official/permanent than a forum.
Nothing is native to Xen.
 
There are obviously some things native to Xen, whatever they may be.
 
Well then where are the sound dogs and bullsquids from? Or headcrabs, for that matter? "Some other random world" is shaky reasoning. Just because Xen acts as a "border world" for aliens to pass through doesn't preclude it from having native life. It obviously has an atmosphere capable of supporting life, so I don't see why everyone's so quick to assume it doesn't.

Remember, the Half-Life universe is intentionally vague, and while it's fun filling in the blanks for ourselves, we should try not to become too fascist about our personal theories. That's definitely not in the intended spirit.
 
It's able to support life, but the life's not native, apparently. Riomhaire posted a direct quote from Laidlaw himself that stated that most of the species there were from other places.

-Angry Lawyer
 
safetyswami said:
Quite informative, although I'm no closer to knowing what the hell a panthereye is. Frankly, I highly doubt they're going to add them in at this point anyway, so what's the use in pretending they exist in the HL universe?

You made too many assumptions. There's no way in hell that those fish can be native to Xen, because there's absolutely nothing for them to prey on. A better guess would be that Nihilanth brought them from their original planet to use as pets/guards. No aquatic species could survive by waiting for prey to fall in the water, especially not one as large and active as the fish.

I seriously doubt the Gargantuans are native to Xen either. It's highly unlikely a predator of that size would evolve when it's biggest prey is a Bullsquid. Hell, even if one DID evolve, it makes no evolutionary sense to have armor plating or plasma-shooting hands or the red ground laser thing.
Still, good work. But I'd suggest trimming some of the speculation if you intend to post this somewhere more official/permanent than a forum.
Actually, it WOULD make sense, in case you haven't noticed those huge ass Tenatacles!
 
The thing is, that Quote from Rionhaire doesnt actually pin down WHICH Xenians fled to Xen. It may be that only the intellgient Xenians are from another world, and all the wild animals are native to Xen.
 
These my theories about Xen and some of the aliens of Half-Life. They may not be right, and from the start I contradict other's opinions/theories, but what the hey - they're just theories. In addition, although I speak as though this is fact, this is only written under the assumption that it is fact, when in fact (pun not intended) it is/may not.

The Combine control Xen. Xen is a useful strategic position for the distribution of their forces, by teleportation. The inhabitants are either native or brought over by the Combine for distributing (the Vortigants being likely). The Combine, through the utilisation of other species, use Xen as a 'barracks' for creating and distributing their forces – which mostly consist of enslaved Vortigants. Alien Grunts, like Overwatch soldiers are modified Vortigants, which are produced on Xen in factories (source). Alien Grunts, in comparison to Overwatch soldiers are significantly more modified, perhaps enabled by their biology.

It is likely that Gargantua is not a natural organism but a cyborg or robot produced by the Combine (source). This would explain its ability to fire flames, balls of plasma and exploding when significantly damaged. The Gargantua may be produced on Xen (although there is no evidence for this in Half-Life), or more likely, transported/teleported to Xen for further distribution elsewhere.

The Combine also utilise lesser-intelligent or wild creatures, which may or may not be native to Xen. The Combine's control of Xen is brought about through Nihilanth. Nihilanth was enslaved by the Combine and controls Xen and the Vortigants force on the behalf of the Combine. Nihilanth had the ability to manipulate beings on Xen (this was probably limited to the Vortigants) and teleport Vortigants, Alien Slaves and other creatures to places in range of Xen. It is unknown whether Xen was planning on invading Earth or whether it was in response to the resonance cascade.

The destruction of Nihilanth had a number of implications. Firstly, the destruction alerted the Combine, who attacked Earth again, either out of fear or threat, or just as a second attempt to conquer Earth, using their own forces or at least a significantly more powerful and larger force. Secondly, it freed the Vortigants who were able to join the human rebellion against the Combine.

As for headcrabs, there are contradicting theories: The former theory suggests that headcrabs are genetically engineered or modified organisms, produced by the Combine. They may be either based on an existing specie or designed and engineered from scratch, for the purpose of attacking the human race. This is supported by the fact the Combine utilise them quite extensively, the fact that headcrabs are only seen to use humans as hosts, and also that they differ significantly from the other alien species encountered: Most aliens have dark, highly pigmented skin, usually a green-brown colour, while headcrabs have pale skin. Perhaps a pigmented skin wasn't important for the Combine's purposes.

The latter theory is that Combine use (or use part of) a creature like Gonarch to breed headcrabs. This is supported by this image. Some suggest that Gonarch was a lone creature. Either it wasn't or the Combine was able to support its egg sac after Gonarch was destroyed by Gordon Freeman. However, it does seem unlikely that Gonarch grew from a headcrab, or at least the headcrabs utilised by the Combine, as the headcrab's apparent purpose is to form a parasitic relationship with a human host, rather than to remain separate, which supports the former theory. Perhaps the Combine use modified 'Gonarch' DNA to produce headcrabs, or the egg sacs (which in turn produce headcrabs).
 
The Combine do not control Xen. Sorry about that
 
IAmAI said:
These my theories about Xen and some of the aliens of Half-Life. They may not be right, and from the start I contradict other's opinions/theories, but what the hey - they're just theories. In addition, although I speak as though this is fact, this is only written under the assumption that it is fact, when in fact (pun not intended) it is/may not.

The Combine control Xen. Xen is a useful strategic position for the distribution of their forces, by teleportation. The inhabitants are either native or brought over by the Combine for distributing (the Vortigants being likely). The Combine, through the utilisation of other species, use Xen as a 'barracks' for creating and distributing their forces – which mostly consist of enslaved Vortigants. Alien Grunts, like Overwatch soldiers are modified Vortigants, which are produced on Xen in factories (source). Alien Grunts, in comparison to Overwatch soldiers are significantly more modified, perhaps enabled by their biology.

It is likely that Gargantua is not a natural organism but a cyborg or robot produced by the Combine (source). This would explain its ability to fire flames, balls of plasma and exploding when significantly damaged. The Gargantua may be produced on Xen (although there is no evidence for this in Half-Life), or more likely, transported/teleported to Xen for further distribution elsewhere.

The Combine also utilise lesser-intelligent or wild creatures, which may or may not be native to Xen. The Combine's control of Xen is brought about through Nihilanth. Nihilanth was enslaved by the Combine and controls Xen and the Vortigants force on the behalf of the Combine. Nihilanth had the ability to manipulate beings on Xen (this was probably limited to the Vortigants) and teleport Vortigants, Alien Slaves and other creatures to places in range of Xen. It is unknown whether Xen was planning on invading Earth or whether it was in response to the resonance cascade.

The destruction of Nihilanth had a number of implications. Firstly, the destruction alerted the Combine, who attacked Earth again, either out of fear or threat, or just as a second attempt to conquer Earth, using their own forces or at least a significantly more powerful and larger force. Secondly, it freed the Vortigants who were able to join the human rebellion against the Combine.

As for headcrabs, there are contradicting theories: The former theory suggests that headcrabs are genetically engineered or modified organisms, produced by the Combine. They may be either based on an existing specie or designed and engineered from scratch, for the purpose of attacking the human race. This is supported by the fact the Combine utilise them quite extensively, the fact that headcrabs are only seen to use humans as hosts, and also that they differ significantly from the other alien species encountered: Most aliens have dark, highly pigmented skin, usually a green-brown colour, while headcrabs have pale skin. Perhaps a pigmented skin wasn't important for the Combine's purposes.

The latter theory is that Combine use (or use part of) a creature like Gonarch to breed headcrabs. This is supported by this image. Some suggest that Gonarch was a lone creature. Either it wasn't or the Combine was able to support its egg sac after Gonarch was destroyed by Gordon Freeman. However, it does seem unlikely that Gonarch grew from a headcrab, or at least the headcrabs utilised by the Combine, as the headcrab's apparent purpose is to form a parasitic relationship with a human host, rather than to remain separate, which supports the former theory. Perhaps the Combine use modified 'Gonarch' DNA to produce headcrabs, or the egg sacs (which in turn produce headcrabs).

Right thought! :cheers:
I have same theory about this! And mayby fast and toxic headcrabs are genticaly engineerd for Combine needs.
Also I agree with you at Gargantua theory (are you inspired theory of mine?).
Good work! :thumbs:
 
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