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