The Sea of Tranquility was a location at which offices of the Weyland-Yutani Corporation were situated, alongside San Francisco, Thedus, and Tokyo. Armstrong ASFB was also located in the Sea of Tranquility.
Appearances[]
- Alien: The Blueprints (mentioned only)
- Alien: The Roleplaying Game (mentioned only)
- Aliens: Fireteam Elite (mentioned only)