Eos is experiencing seismic activity. Altering the tremors with a survey hammer might allow better irrigation for Prodromos.

Acquisition Edit

Get the mission from Hainly Abrams in Prodromos. She will be marked with an "!" when the mission is available. This may require talking to her multiple times to clear out some dialogues which are tied to main quest progression. Dialogue here will be different depending on whether or not Ryder has defeated Architects before. If Ryder has, then the purpose of placing the hammers will be to lure out the Architect; otherwise, the seismic hammers will be used to investigate unknown seismic activity.

Walkthrough Edit

Placing three seismic hammers will make the planet's boss appear: The Architect.

Place the first seismic hammerEdit

Go to the navpoint and interact with it. Defeat the Remant forces coming up from the ground.

Place the second seismic hammerEdit

When you arrive at the navpoint, there is a group of strangers calling for your attention.

Investigate the strangers at the siteEdit

They are exiles from the Nexus, and the scout informs you that they are a group belonging to the new and independent nation Advent. They want Ryder to drill for natural gas rather than for water, because the latter will harm their settlement. After finishing speaking with the strangers, two navpoints appear. Ryder can only do one of those objectives:

  • Drill for gas, which might harm the environment on Eos. On the other hand, Prodromos can trade gas for water with the Advent.
  • Drill for water, which might destroy the Advent settlement.

There are no known consequences in the game for either option so it doesn't matter which one you choose.

After placing the hammer, some Remnant appear and have to be defeated.

Place the third seismic hammerEdit

The Architect appears.

Take down the ArchitectEdit

Defeating it is a four phase fight: destroy its three leg conduits and finally the head conduit.

It has devastating weapons so keep moving to avoid getting hit. It spawns Remnant forces in waves. When one leg is destroyed it flies away to a location nearby.

Advice: An assault rifle is good for shooting the legs. Keep running (and sprinting) while shooting. The architect's gun and other weapons will not catch up with you.

This is repeated for the second leg.

When the third leg is destroyed the head remains.

Cobra RPGs are good to use for the head (you have had some chances to fire at the head in the fights for the legs). You can buy them from the merchant in Prodromos (only sells one at a time). Buy 3-5 to avoid a prolonged fight taking out the head. To fire the RPG: press Tab, select the Cobra, aim at the opened head, and use the usual fire button (left mouse button on PC). To make the Cobra available in combat: During Loadout, select Consumables and put it in one of the consumables slots.

You may wish to read the detailed description on the Architect.

Interface with the ArchitectEdit

When the Architect is defeated, interface with its head. This completes the mission.

Don't forget to loot the container. In it is a Remnant data core for Task: Remnant Data Cores.


  • 530 XP
  • 400 AVP
  • 10% Eos viability


You may want to return to Hainly Abrams for some feedback.

The defeated Architect is floating in Eos's atmosphere: "Architect Husk: Eos". It can be looted from the Tempest using the Galaxy Map (50 Remnant research data).