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Up to date as of February 01, 2010

From The Vault

For the location/alien ship, see Mothership Zeta (vehicle).
Mothership Zeta
Developer: Bethesda Game Studios
Publisher: Bethesda Softworks
Size: 324.36 MB
Release date
PC: August 3, 2009
Xbox 360: August 3, 2009
PlayStation 3: October 8, 2009
PC: Games for Windows Live
Xbox 360: Xbox Live Marketplace
PlayStation 3: PlayStation Network
Patch: Patch 1.7 (PC)
Patch 1.6 (PlayStation 3)
Patch 1.5 (Xbox 360)

Mothership Zeta is the fifth and final add-on for Fallout 3, developed and published by Bethesda Softworks.

Defy hostile alien abductors and fight your way off of the massive Mothership Zeta, orbiting Earth miles above the Capital Wasteland. Mothership Zeta takes Fallout 3 in an entirely new direction – outer space. Meet new characters and join with them in a desperate bid to escape the Aliens’ clutches. To do so, you’ll wield powerful new weapons, like the Alien Atomizer, Alien Disintegrator, and Drone Cannon, and deck yourself out in brand new outfits, like the Gemini-Era Spacesuit and even Samurai Armor.

—official description


Release and availability

Mothership Zeta was initially released exclusively as downloadable content on Xbox Live and Games for Windows Live on August 3, 2009. It was made available for Playstation Store on October 8, 2009. For Xbox 360, download codes for Xbox Live are also available in retail. The add-on costs 800 Microsoft points or $9.99.

Mothership Zeta is not part of any of the Fallout 3 Game Add-on Packs. Like all add-ons, it is included in the Fallout 3: Game of the Year Edition, released on October 13, 2009 for all platforms. It costs $59.99 for PS3 and Xbox 360 as well as $49.99 for PC.


Aboard the Mothership

In Mothership Zeta the aliens have returned and they are not happy. An alien mothership abducts the player, making the whole add-on take place onboard the alien ship in orbit around Earth.

Onboard the Mothership, the quest line is not completely linear and features some exploration. You are able to take a spacewalk and you encounter other abductees, who are all fictional characters from the Wasteland and Earth's past.

The player is able to return to the ship once the main quest is over and to use the ship as a "home-base" of sorts.



You receive an unintelligible radio transmission which leads you to the Alien Crash Site. On approaching the wreckage, you are "beamed up" into the alien mothership, Mothership Zeta, where you will meet other prisoners who have also been abducted over the centuries. You must work together to escape.

After being beamed aboard, you get to be the subject of an alien medical experiment. In the cutscene, you pass out during this procedure and awaken in a cell with another abductee named Somah. She explains that all of their equipment has been taken. She comes up with a plan of escape - staging a fistfight so that the alien guards will intervene, then overpowering them. Somah and the player soon come across Sally, a little girl who was abducted soon after the Great War, who asks them to help her escape by destroying the reactor in the room. After freeing her, she explains that she knows a lot about the ship and will aid you in turn.

Sally leads you to a room with several cryo-tubes, so that you can acquire a spacesuit from one of the frozen abductees, an astronaut (unfortunately, he does not survive the "thawing" procedure). The suit is needed for a spacewalk outside the ship to access a teleporter; first, however, you must destroy the generators in three other areas of the ship in order to provide a distraction. Three of the abductees will offer to follow you through each of the generator areas: Elliot Tercorien will follow you into the Cryo Labs, Somah will follow you through the Robotics Factory, and Paulson will join you in the Hangar.

After you have enabled the teleporter, the survivors are beamed to the upper section of the Mothership, where they witness a demonstration of the ship's Death Ray as a threat to scare them into surrendering. You must then fight their way through the second saucer section which consists of a weapons laboratory, biological experimentation lab, Death Ray control center, living quarters, and finally, the bridge. There, you and the rest of the abductees must defend the bridge while at the same time using the ship's weapons to defeat an attacking alien vessel similar to their own.

Upon defeating the ship, the abductees celebrate and Sally or Elliot (whichever gets to the player first) reports that in the midst of all of the chaos on the bridge, Elliot pushed a button which dropped a beacon on the surface (at the former Crash Site). This beacon allows the player to return to the Capital Wasteland or teleport from there to the Mothership (though much of it is now inaccessible).




Armor and clothing




Other items



Name Level req Other requirements Ranks Description Code
Xenotech Expert - None 1 +20% damage with alien weapons xx00abb0

Quests and achievements

Main quests

Name Location(s) Given by Reward Achievement points Trophy Quest ID Image
Not of This World Alien Crash Site
Holding Cells
Engineering Core
Notification 300 XP 20 Silver xx000802 Image:Not of This World.png
Among the Stars Mothership Zeta Sally 300 XP 20 Silver xx000803 Image:Among the Stars.png
This Galaxy Ain't Big Enough... Mothership Zeta Sally 600 XP
Captain's Sidearm
40 Gold xx000804 Image:This Galaxy Ain't Big Enough....png

Other achievements

Name Requirement Achievement points Trophy Image
Alien Archivist Collected all Alien Captive Recordings 20 Silver Image:Alien Archivist.png


Official screenshots

Trailer screenshots


Official trailer

Other videos


Mothership Zeta (add-on)
Fallout 3 add-ons and downloads
Fallout series

This article uses material from the "Mothership Zeta (add-on)" article on the Fallout wiki at Wikia and is licensed under the Creative Commons Attribution-Share Alike License.


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