Alien vs. Iron Warrior only embodies two kinds, drone alien and alien queen. From the whole alien series, it can be divided into drone alien, spy alien (messenger), steel alien, combat alien (Royal Guards), alien queen, alien queen, reverse species and red mutant alien. Generally speaking, the aliens in Alien 2 belong to combat aliens, the dogs in Alien 3 belong to messengers, and the fourth generation aliens are obviously smaller and should be drones (not strictly). The reverse alien is a special species and the only one among the fourth aliens who died.

The following is a detailed introduction:

Drones are aliens who are hosted by humans. They are excellent soldiers, with a balance of speed and fighting capacity. They are flexible and good at moving in ventilation ducts. They usually move in groups, although they are also deadly when they move alone. Usually they are responsible for attacking the enemy and finding the host and bringing it back to the nest.

Messenger Alien Messenger Alien plays the role of scout in the nest, which is slightly smaller and more suitable for activities in a narrow space. They parasitize other nonhuman mammals (such as dogs, cows, etc.). Messenger aliens have a speed that other aliens don't have. They have a smooth and hard head and no spine. Their main attack mode is to pounce on their opponents quickly.

Iron and blood aliens, iron and blood aliens are aliens with iron and blood soldiers as their hosts. The genetic mixture of steel warriors and aliens has created the steel aliens with the strongest strength and the largest range of surprise attacks. They are much stronger than ordinary species and can climb walls, but their bodies are slightly bulky.

The evolutionary alien Royal Guards, also known as the Imperial Guard, are huge and bloated, but they are not easy to find. They usually lurk around the nest and are loyal guards of the alien queen. The alien royal guard is only one size smaller than the queen. Although it is huge, it has a hard skin like armored metal plate, which can resist the attack of general weapons. Moreover, the hand-to-hand combat ability is higher than that of five ordinary aliens, and the agility and jumping ability are average. They can't climb walls and raid like other aliens. Aliens can evolve into guards, and the best can become queens. )

Alien queen, an alien with strong appearance, strength and weight, is the ruler of the nest, shouldering the mission of breeding aliens and having the right to command and control other aliens. The queen is the master of the whole alien race. It is about 4.5 meters high, and its main duty is to lay eggs, but it will not stay in the nest all day like a docile old hen. When in danger, the queen bee can separate herself from the huge ovipositor, and sometimes escape from the nest when in danger, but this means that the queen bee can't continue to lay eggs for a long time.

The alien's mother, in any way, has always been a mystery in the scientific community. Alien mothers are often mistaken for queens because they are almost the same in appearance and ability. The only difference is that alien mothers are bigger, more fertile and have the ability to control other aliens and even the queen, so they are the terminator of aliens.

Anti-alien, in Alien 4, an alien queen born in ripley has a human uterus, resulting in an alien (absorbing human DNA and growing up, leading to the formation of a humanoid anti-alien), with beige body, no tail, human eyes and nose, and even the teeth in the inner nest degenerated into human tongue.

The evolution of red aliens, sharp claws, taller and bigger body, crimson, not good at climbing. Fighting power is second only to the alien queen, belonging to the alien captain and only obeying the orders of the alien mother.

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