Nexus Mass Effect 3
This nebula has been identified on side quests (I put all priority missions on standby ... ironically) so that I don't miss out on any content. Is this a case of a galaxy just not being available until the main plot line catches up?
How far do I have to progress to open these up?
ThariusHades Nexus: Prothean Sphere Small quests Mass Effect 3 Guide. This quest can be activated by overhearing a conversation between one of the refugees and the C-SEC officer. The meeting takes place in dock E28 in Citadel: Port - Holding Area and you'll find out that the refugee wants someone to explore Prothean ruins in the Hades Nexus in order to find a valuable artifact.
Nexus Mods Mass Effect 3 Alot
Tharius4 Answers
The two IGN articles on them say that you gain access to them after the Priority: Thessia mission near the end of the game, so yes it looks like you need to progress through the main plot line to get them.
Matthew ReadMatthew ReadPriority Rannoch, I know this from personal experience
The Cyone system within the Silean Nebula is available fairly early in the game. But there are systems within the Silean Nebula (Phontes and Teyolia -- maybe others) that do not become available until after Priority: Rannoch. I've just completed Priority: Rannoch and Hades Nexus is not yet showing on up the Galaxy Map.
Full Silean Nebula is available after Priority: Rannoch, while Hades Nexus seems to be after Priority: Thesia
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Mass Effect 3 Nexus Ashley
The Hades Nexus contains the Hoplos, Sheol, Hekate and Pamyat systems.
Mass Effect 3 Nexus Cooldown
You will gain access to the Hades Nexus after Priority: Rannoch
Fuel, War Assets and Anomalies[edit]
| System | Location | War Asset |
| Hekate | Southwest of Mass Relay | Wreckage: Fuel 380 |
| Hekate | Asteria | Alliance Frigate Hong Kong, Alliance Fifth Fleet |
| Hoplos | Kopis | Artifact: Obelisk of Karza |
| Hoplos | Far West of System | Wreckage: Fuel 250 |
| Sheol | Gei Hinnom | Artifact: Prothean Sphere |
| Pamyat | Dobrovolski | Alliance Frigate Leipzig, Alliance First Fleet |
| Pamyat | South of Star | Wreckage: Fuel 100 |