Alien (Fallout: New Vegas)

Aliens are creatures found in the Mojave Wasteland in 2281.

Location
The aliens are encountered due north of Horowitz Farmstead and east of Brooks Tumbleweed Ranch. Their ship can be seen hovering just on top of the cliff that spans the north edge of the map.

If the player does not have the Wild Wasteland perk then this spot will be taken by relatively friendly mercenaries. One of them will own the unique Gauss rifle, YCS/186.

Aliens only yield 1 XP and count as an abomination.

Alien
Aliens appear only once in  Fallout: New Vegas and are identical in appearance to the aliens found in the Fallout 3 add-on Mothership Zeta. These are three aliens - two with tri-beam laser rifles and their captain, wielding a laser pistol and carrying the Alien Blaster. They only appear when the Wild Wasteland trait has been selected.

Alien Captain
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.

Appearances
Aliens appear in Fallout: New Vegas with the Wild Wasteland trait, and in the Fallout 3 add-on Mothership Zeta.