The achievements and main quests for the upcoming Fallout 3 add-on Mothership Zeta have been revealed. It will add four new achievements worth 100 gamerscore points, increasing the total possible gamerscore for Fallout 3 to 1550.

The achievements are:

name gamerscore requirement image
Not of This World 20 Completed "Not of This World" Not of This World
Among the Stars 20 Completed "Among the Stars" Among the Stars
This Galaxy Ain't Big Enough... 40 Completed "This Galaxy Ain't Big Enough..." This Galaxy Ain't Big Enough...
Alien Archivist 20 Collected all Alien captive recorded logs Alien Archivist
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