Aliens are an xenomorph race who's origins are relatively unknown. Aliens are viewed by both the predator species as a danger, humans would rather have them tamed and used for war. While the predator species hunt them for sport, or if certain situations arise to kill them off.

Special Abilities:

• Aliens have a inherit regeneration as an ability. That means if your Blood is damaged, you will auto heal over time depending on how many Hosts you have. This also means there is no other way of healing faster.

• Aliens also have acid for blood. So when attacked, they will have a chance to automatically splash some acid onto the enemys weapon or the enemy himself. This does damage to the attacker, or may cause the weapon to melt, otherwise known as Breakage.

• Adrenaline is used to fuel their attacks and can be regained by using Host Devours.

• Aliens are able to carry the most weight of the three species with a starting weight max at 200 pounds.

• Aliens hide by wallwalking and climbing up a vent or similar hole.

• Alien Weapons and Armor are biological
  

Life Cycle:

Aliens start as an egg. After a small amount of posts, they hatch and become facehuggers. At this point the alien will not gain any more posts or increase to the next life cycle, UNLESS they use a facehugger item and successfully impregnate an enemy.

Once this is done, they will gain the life stage of an embryo, and will still not gain a post count. Then they must gestate for a random amount of time. Then they will erupt from the enemy's chest in the form of a chestburster, and then they can gain posts and continue on with their life cycle.

Note: The enemy will take massive damage, and there is a rare chance of it turning into an alien as well. If the face hugging attempt fails, the alien will need to try again.

See also:
List of Alien rankings
Alien Armor
Alien Weapons
Hosts