Sol One Demo: What the Next Fest Build Showed and Whether You Can Still Play It

A Sol One demo ran during Steam Next Fest and took wishlists from 5,000 to over 25,000. What it contained, and whether it is still available now.

Last Updated: 2026-11-10

Sol One had a demo. It ran during Steam Next Fest, and by the developer's own account it moved the game from roughly 5,000 wishlists to more than 25,000. For a solo project, that is the moment the game went from "interesting" to "anticipated."

The obvious question is whether you can still play it. The honest answer: not confirmed. The demo was a Next Fest event build, and event builds frequently come down when the festival ends.

This page covers what the demo contained, how to check whether it is live, and what to do if it is not.

A demo build running on a monitor, with a Martian horizon behind it
A demo build running on a monitor, with a Martian horizon behind it

What we know

Question Answer
Did a demo exist? Yes, during Steam Next Fest
Is it still available? Unconfirmed
Does it represent the launch build? No — it predates the final launch build
Does progress carry over? No, demos do not carry saves
Wishlist impact ~5,000 → 25,000+

The wishlist figure is from the developer's own pre-launch communication. It is the clearest public signal of how the demo was received.

What the demo likely contained

A Next Fest demo is a vertical slice, not the full game. Based on the systems the developer has described as in the launch build, a demo of Sol One would plausibly show:

  • The opening: landing, first shelter, the suit and oxygen loop.
  • A slice of the base: a sealed room, an airlock, a first power source.
  • Basic crafting: extraction and processing, perhaps a first fabrication.
  • A taste of the world: terrain, sky, a point of interest.
  • Not the rocket. The campaign goal is a full-game project, not a festival slice.

Treat that as inference from the feature list, not a confirmed demo contents list.

A demo is a sales pitch, not a review copy

Next Fest builds are tuned to make a good first impression in 30–60 minutes. They are useful for testing whether the game runs on your PC and whether the loop appeals to you. They are not a benchmark for the launch build's stability.

How to check if the demo is still live

Three places, in order:

  1. The Steam store page. If a demo is available, Steam shows a "Download Demo" button next to the purchase box. If it is not there, the demo is not available.
  2. The Steam demo page for the app. Steam hosts demos under the game's app; a direct link appears on the store page when live.
  3. The developer's announcements. If the demo is brought back for launch, the developer will say so.

Do not trust a third-party download site. Demos are distributed through Steam, and anything else is either a repack or a scam.

If the demo is gone

You still have options before spending money:

  • Wait for launch and use the refund window. Steam's standard policy — under two hours of playtime, within 14 days — is effectively a demo for a game like this. Test the first hour: landing, shelter, power.
  • Watch a launch-day stream. A first-person survival game is easy to judge from 30 minutes of unedited footage.
  • Read the beginner guide→. It describes the opening loop in detail; if it sounds tedious, the game probably is not for you.
The two-hour window is the real demo

If no demo is live at launch, buy on release day, play the opening, and decide inside the refund window. That is cheaper than a bad full-price purchase.

Will the demo return?

Possible, not confirmed. Developers sometimes re-release a demo for launch week or for a later festival. Watch the store page and the developer's channels in the days around November 13.

A returning demo would likely be the same Next Fest build or a lightly updated version. It would still not be the launch build.

What the demo told us about the game

Three signals worth keeping:

1. The concept lands. A demo that takes a game from 5,000 to 25,000 wishlists is doing something right. For a solo project with no marketing budget, that is word of mouth.

2. The opening is the strong part. Next Fest builds are usually the first hour or two, and the reaction suggests the opening — landing, shelter, life support — is compelling.

3. The late game is unproven. No demo shows the rocket programme, the full research tree or the long-run base. Those are the parts Early Access will test.

A crashed ship POI on the Martian surface
A crashed ship POI on the Martian surface

Demo versus Early Access

A common confusion: the demo is not a free version of the Early Access game. They are different builds with different purposes.

  • Demo: a curated slice, free, no save carry-over, usually time-limited.
  • Early Access: the full launch build, paid, with the complete loop and the rocket.

If you played the demo and liked it, the Early Access build is the same game with the rest of the systems attached. If you did not, the launch build is unlikely to change your mind — the opening is the part demos show best.

FAQ

Is the Sol One demo still available? Unconfirmed. Check the Steam store page for a "Download Demo" button; that is the authoritative answer.

Is the demo free? Yes, Steam demos are free.

Does demo progress carry to the full game? No. Demo saves do not transfer.

Is the demo the full game? No. It is a limited slice, typically the opening.

Will there be a demo at launch? Not announced. Watch the store page around November 13.

Can I get the demo from another site? No. Use Steam only; third-party downloads are not official.