Explore Acheron in the Styx Theta cluster of Mass Effect: Legendary Edition. Find listening posts, heavy elements, rare elements, and more.
To visit the Acheron system in the Styx Theta cluster, you'll first need to complete the mission on Noveria. Altahe is a bit of an odd planet in that you might not have an official assignment when you land there. If that's the case, you can start the UNC: Listening Post Theta assignment by finding a Listening Post on Altahe’s surface. Alternatively, this assignment might kick off after you finish UNC: Listening Post Alpha in the nearby Erebus system.
Beyond that, keep an eye out for some rachni nests in the southeastern part of the map. Clearing them out will net you some valuable XP.
Points of Interest on Altahe
| 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 |
Note: A map of Altahe is available for reference.
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