Complete each achievement to get the allotted gamerscore.
Unlockable How to Unlock Alien Archivist (20) Collected all Alien Captive Recordings Among the Stars (20) Completed "Among the Stars" Not of This World (20) Completed "Not of This World" This Galaxy Ain't Big Enough... (40) Completed "This Galaxy Ain't Big Enough..."
Contributed By: Guard Master.
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