Aliens are relatively small, green yellowish-skinned humanoid beings with no primary sex characteristics. Their bodies are elongated with a small chest, are lean and lack any muscular definition. They also display no body hair of any kind. Their legs are shorter and jointed differently than a normal human and their limbs are also proportionally different than a normal humanoid; their humerus and femurs are the same lengths as their forearms and tibias.
Their heads are unusually large in proportion to their bodies and no noticeable outer ears or noses, instead only having small orifices for ears and nostrils. They have very wide mouths, no teeth, a light green tongue and large opaque black eyes with no discernible iris or pupil. Their hands have only three long suctioned-cupped fingers and no thumbs, however their fingers are so long they can wrap around objects and use any objects like any other humanoid species. They seem to breathe a similar atmosphere that humans do and process nutrients through the body with green blood. They subsist on a diet of unknown worm and squid food.
These aliens are far more hardy than their cousins in mothershipZeta but have the same amount of hit points. The alien captain however has 16 times more hit points than his mothership Zeta counterpart.
The alien captain is a stronger variant of alien found in the Mojave Wasteland. Like the other aliens, he only appears if the player has the Wild Wasteland trait. The captain is noticeably taller and more human-like in stature than the other two aliens, and appropriately has much more HP. The aliens appear to scale to the player's level. The alien captain has the alien blaster in his inventory, but does not use it in combat against the player. If the captain is killed without the other aliens noticing you, they will not become hostile towards you, but cannot be talked to.
Their captain will always appear hostile, while the other two aliens will not be hostile unless the captain spots the player. If players kill the captain while hidden the other two aliens will not become hostile unless attacked but instead will stand and look at the player silently, because unlike in Fallout 3, they lack voices.
If an alien's torso explodes, pieces of flesh left will be oversized compared to the original body size. These bodyparts will also be red despite the original green color of the alien.
The alien captain almost always flees, while as the other 2 aliens will assault the player with laser weapons.
The alien captain will not use the alien blaster against you. He cannot equip it and will use a laser pistol instead.
The aliens encountered in the Mojave seem to be taller than the Mothership Zeta aliens. They are the height of a regular human.
Looking at the ship, it appears to be broken and there are many wires hanging out of the back. This appears to be the same kind of recon craft that crashed in Fallout 3.
These aliens can be assumed to be of the same faction/species as those encountered in the Fallout 3 add-onMothership Zeta. It is possible that the captain escaped the second mothership before it crashed to Earth.
If the player does not have the Wild Wasteland trait, this spot will be taken by mercenaries. One of them owns the unique Gauss rifle, YCS/186.
In some cases the player can find two weapons of the same type on one alien (this does not happen on the alien captain)
Companions often pick up the alien blaster before the player can, The player should always check the inventory of their companions if they cannot locate the alien blaster.
PC Sometimes the aliens and their captain wander off and vanish from their camp.