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Mass Effect 1 Legendary Edition


Nathan Garvin

Points of interest for the Acheron system in the Styx Theta cluster.

Missions / Assignments
UNC: Listening Post Theta

The location of a Carbonaceous Asteroid in the Acheron system.

Points of Interest

Location Points of Interest
Altahe UNC: Listening Post Theta
Altahe Heavy Element
Altahe Rare Element
Altahe Matriarch’s Writings
Altahe Crashed Probe (loot)
Carbonaceous Asteroid Turian Insignia
Grosalgen Light Metal

Map of Altahe.


To visit the Acheron system in the Styx Theta cluster you have to complete the mission on Noveria, first. Altahe is an odd planet in that you may not actually have an assignment when you land on it. If not you can start UNC: Listening Post Theta by visiting a Listening Post on Altahe’s surface, otherwise this assignment may start after you complete UNC: Listening Post Alpha in the nearby system of Erebus.

Aside from this, you’ll find some rachni nests in the southeastern corner of the map, which you can clear for some XP.

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Guide Information
  • Publisher
    Electronic Arts
  • Platforms,
    PC, PS4, XB One
  • Genre
    Action RPG, Third-person shooter
  • Guide Release
    14 May 2021
  • Last Updated
    17 August 2021
    Version History
  • Guide Author

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The guide for Mass Effect 1 Legendary Edition features all there is to see and do including a walkthrough containing coverage of all Assignments, detailed breakdown of all the important choices, class builds and much more!

  • Full coverage of all the Main Missions.
  • Every Assignment covered.
  • In-depth look at the major choices and consequences of each.
  • Full details on how to romance Ashley, Kaiden or Liara
  • Class builds to get the most out of your chosen class.
  • Details on every Talent.
  • How to spec your squad.
  • Breakdown of all Paragon and Renegade opportunities.
  • Trophy/Achievement guide.

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