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Alien
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Alien

Xenomorph

Alien's History

Xenomorph Life Cycle

There are several different phases to a Xenomorph's life-cycle, and what kind of adult Xenomorph will come into existence depends entirely on the being that it hatches from.

Egg
Eggs are lain by an Alien Queen, and exiting her body through an overgrown egg sack. The egg is a leathery sack approximately 2.5 feet tall. They are the very simple first step in the Xenomorph life cycle.

Facehugger
The Facehugger is what lays inside the egg. After a certain amount of time or if a host were to come too close to an egg, the Facehugger inside senses it through pheromones, and the egg opens up like a blossoming flower with the Facehugger launching itself out and planting itself onto the host's face.

Its long tail will wrap around the host's neck, and it will grip the head with its long eight legs - the Facehugger resembles a flat spider, in a sense. It has acidic blood and will bleed the acid on its victim if cut, and if attempts are made for it to be pried off, its tail tightens around the host's neck and a chemical will cause them to go into a cardiac arrest. The Facehugger also makes its host unconscious with oxygen deprivation. Once the Alien embryo is planted into the host's body, the Facehugger will detach, and die shortly afterwords. The host will wake up with no recollection to the event.

Chestburster
As time passes, the egg that was planted inside of the host will begin to stir. Then, it will begin to claw its way out of the host's chest, through the center of his ribcage. This obviously causes extreme pain, and as soon as the Chestburster breaks through, the host dies. It will then flee at top speeds to grow into its adult form and become even more dangerous. Its appearance changes in its variations, but it is small, with an elongated cranium, pale or dark skin, and a long tail - almost like a snake. Basically, Chestbursters are infant versions of Xenomorphs.

Adult
There are many different kinds of Adult Xenomorphs - however, they share the same general appearance. After the Chestburster has fled, it will wait and mature, shedding its old skin to reveal the darker kind, and its head will expand backwards into a crescent shape. It will grow arms and legs, its tail will lengthen and become much stronger (even to the point of being able to impale fully grown humans), and its blood will be much more acidic. Xenomorphs have many distinguishing features, namely:

  • They do not show up on infra-red scanners, as they take on the temperature of their environment (this contributes to their adaptability).

  • Inside of their mouth is a second "mouth" - in appearance - however, this is its tongue, which has shown the strength to be able to punch through skulls, steel, and even the highly durable metal of the Predator species.

  • They (apparently) do not have visible eyes, but can see pheromones and inverted light which would explains how they can detect cloaked Predators and see in the dark.

Xenomorphs are the stuff of nightmares - they are vicious, cannot be reasoned with, and will never, ever give up. They operate entirely on the instinct to survive and propagate their race, but are surprisingly intelligent, able to remember through genetic memory their host's life and past. They communicate with a Queen and each other through changing pheromones and/or sub-supersonic sounds.

Variations of Aliens

There are several variations of adult Xenomorphs, as they take on the characteristics of the host from which they hatch in order to better adapt to their environment. Countless varieties have been proposed throughout the various forms of media in which Xenomorphs have been depicted. Video games have added a considerable amount of these in order to create unique enemies of differing strengths and capabilities for players to fight. These variations are typically the result of Xenomorphs hatching from different kinds of hosts, but they also sometimes result from genetic tampering with the Xenomorphs by organizations seeking to exploit the race's unique abilities.

There are a select few that are most often depicted however, namely:

  • The most well-known are the "Warrior" brood. These are the ones that appeared in both the Alien and Aliens films - they have the long crescent head, dark skin, sharp claws, and deadly tongues; and they are the result of Xenomorphs hatching from humans, or at least beings with characteristics similar to humans..

  • The next type was the "Runner" - this is the Xenomorph that appeared primarily in Alien 3. This brood is especially fast and agile, and is also known as the Dog Alien for having hatched from a dog. It appears to only hatch from quadrupedal hosts.

  • An especially unique brood appears in Alien Resurrection - an Alien that is half human/half-Xenomorph. It looked more human than other Xenomorphs, as it had no tail, normally walked on two legs, and its skin wasn't black. It looked somewhat like a human newborn baby. It was created through the unintentional gene-splicing that occurred when Ellen Ripley was cloned in order to retrieve the adolescent Alien Queen that had been inside her when she died. The Alien Queen wound up getting Ripley's reproductive genes, receiving a degree of human DNA, with some Xenomorph genes used to fill in the gaps. This was a genetic aberration however, and was undoubtedly the only one of its kind to ever come into existence.