AETHUS entrance to seam-x5: Cavern Location and Crate Code

The AETHUS entrance to seam-x5 sits northwest of Facility Tau down near the central lava lake, situated directly along the right side of the magma fall. Inside the cavern, players find rich Hyperion crystal nodes and a locked storage container.

Finding the Seam X5 Cavern Entrance

Granddad's Kappa module recording provides the navigational waypoints needed to reach Seam X5. The cavern entrance lies northwest of Facility Tau in the Magma Reefs region. Head down toward the central lava lake and look for the large magma fall cascading down the rock face. The cave opening rests on the right-hand side of this fall behind the rocky terrain.

The surrounding Magma Reefs environment carries extreme ambient heat. Entering this sector quickly depletes suit thermal buffers, causing Maeve to collapse if exposure lasts too long. Carrying coolant supplies or establishing an Atmo Dome ensures you can search the interior safely without succumbing to heat damage.

Unlocking the Seam X5 Storage Crate

Inside the first chamber of the cavern, search behind the metal crates stacked in the corner to find a secure supply container. The chest uses an Active Code Lock 2 interface backed by a four-digit rolling cipher that cannot be bypassed with basic hacking tools.

The solution comes from the cryptic coordinate file 28 X09 left in Roland's memory stub. This date corresponds to Maeve's birth year:

• Container Lock Code: 2317

Opening the container yields two major items:

• Blueprint: Atmo Dome (Riot Protect Edition)
• Gerard Shaw's Personal Key Card (Chief Scientist AI Access Level 4)

Collecting the key card triggers an archived memory stub from Gerard Shaw. The recording instructs Maeve and Roland to take the key card to Facility Omicron, bypass the main gate, and access the secure records room inside.

Exploration Gear and Cave Hazards

Navigating deeper into Seam X5 requires specific mobility equipment and survival items to handle wide chasms and radioactive thermal pockets.

Glowing unstable chunks also line the cavern walls. Disturbing or detonating these unstable formations triggers a blast that cracks open tough surrounding nodes while yielding refineable minerals.

Harvesting Hyperion Crystals

Beyond the initial chasm, the cavern opens into a massive mineral deposit. Roland's scanner identifies these deposits as hyperion crystal, valued by corporate extractor ARC at roughly 34 million credits across the full seam.

Each individual Hyperion crystal sells for 5,000 credits on the open market, providing enough funding to purchase late-game outpost expansions and vehicle paint schemes. These crystals also serve as raw ingredients for advanced electronics, including the cognitive linkage module needed to reactivate Stanley. After clearing the deposit, use Gerard Shaw's access card to proceed toward Omicron as outlined in the campaign walkthrough.