RADIOSOL Guide

RADIOSOL Walkthrough: Chapter 1 Route & Milestones

Published · Updated

This is a short RADIOSOL Chapter 1 route. It is intentionally narrower than the full walkthrough: it gives you the main order of objectives without turning every optional stop into a required detour. Use shade for every exposed crossing and mark the next landmark before moving.

The researched route assumes the Chapter 1 build available after launch and the official patches checked on October 5, 2026. If a terminal refuses a file or access level, check the systems menu before assuming the route is wrong.

Chapter 1 route

  1. Complete the tutorial inside the Starting Shelter.
  2. Descend the shaft near the first tunnel and download Calypso 5 #1.
  3. Leave through the ventilation passage and surface.
  4. Follow pipes and shaded structures toward Megapol Station.
  5. Sign the document and select the three fingerprints to contact N3.
  6. Reach Megapol Station and interact with the terminal at the pressure door.
  7. Mark the Power Sphere behind Megapol.
  8. Travel to Agglomerate 5 and find the ventilation route.
  9. Collect access files and upgrades needed for the Power Sphere route.
  10. Restore power inside the Power Sphere.
  11. Return to Megapol Station, open the pressure door and board the train.

This order keeps the main story moving while grabbing the first collectible early. You can complete optional achievements later, but the first probe is much easier to pick up while you are already in the shelter.

Shelter to Megapol

The Starting Shelter teaches the basic systems and gives you a safe place to learn the controls. Finish the tutorial before optimizing movement. After that, descend the shaft near the first tunnel to download Calypso 5 #1 from the damaged probe droid.

Surface through the ventilation passage. Outside, prioritize shade over the shortest line. Pipes and rail structures lead toward the city and give you repeated places to stop before crossing another exposed patch.

Before Megapol, sign the document and choose three fingerprints to contact N3. This begins the main objective chain. At Megapol Station, the pressure-door terminal reveals the Power Sphere problem and gives the next phase a concrete goal.

Agglomerate 5 and preparation

Agglomerate 5 is the tall antenna building west of Megapol. It is a major navigation anchor and the access point to the ventilation route toward the Power Sphere. Climb high enough to identify the red-lit cylindrical structure before descending.

Try the emergency fan shutdown when you find it. In the normal route order, it will fail until you have Level 3 Access and NED. That failure is useful information: it tells you which parts of the map still need preparation.

Use this phase to gather access files and upgrades. You will need Level 2 Access, transmitter software, the NED signature, NightOwl and Level 3 Access. The RADIOSOL Checklist groups these tasks in one list.

Power Sphere completion

After preparation, return through the Agglomerate 5 fan route. Use Level 3 Access and the emergency stop, crawl into the shaft and enter the Power Sphere. Inside, connect all three power injectors.

Powering the Sphere is both a story achievement and a world-state change. Shadows move faster after this point, so do not rely on a route that worked before. Re-plan the return trip stop by stop.

Before leaving, check the large pipes extending from the Power Sphere for Calypso 5 #8. Our RADIOSOL Collectibles page places it in the full nine-probe sequence.

Final return and Chapter 1 endpoint

Return to Megapol Station using the same principles you used early: identify the next shaded stop, avoid long sunlight sprints and climb for a view if you lose the route. The difference is that the shadows are now moving, so timing matters more than before.

At Megapol, open the pressure door and descend to the railway platform. Turn left, interact with the train and board it. This completes the currently available Chapter 1 story.

Chapter 1 remains explorable after reaching the train. If you want full completion, finish all nine Calypso 5 probes, optional upgrades and missing achievements before moving on. Our RADIOSOL Map Guide can help you connect any remaining landmarks.

Milestones and next steps

The main milestones are entering the simulation, contacting N3, reaching Megapol, activating the Power Sphere and boarding the train. Each one gives a clear checkpoint if you need to retrace your route.

If you are stuck on a specific machine, go to RADIOSOL Puzzle Solutions for the train, Depot radio, Radio 0 and fan terminal. If you need signal context, see RADIOSOL Signals.

No active RADIOSOL Codes were verified during this research pass. The route here does not require any code, downloadable bonus or third-party unlock.

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