Galactic Simulator 3 is a space exploration and evolution sim inspired by the Fermi Paradox and Great Filter theory. Scan uncharted star systems, gather resources and samples, establish outposts and stargates, and witness the rise and fall of civilizations across an evolving galaxy.

Climbed 8 places to #40 on the Steam 250 weekly chart with a score of 6.92 and an 85% positive rating from 21 reviews. Released 4 September 2026.

Key features

Civilisations rise and fall without you

The galaxy evolves on its own timeline. Most space sims make the player the only agent of change; letting civilisations collapse whether or not you visit is what gives the Great Filter premise any weight.

Scanning as the core verb

You survey systems and gather samples rather than conquer. Choosing observation over combat is unusual enough in the genre to be the reason to play it — and the reason it will not suit players who want a fleet.

A real theory as the design brief

The Fermi Paradox asks why a galaxy this large is this quiet. Building the simulation around that question means the empty systems are the content, not a lack of it.

Where to find Galactic Simulator 3

• Available now on Steam — $5.59

Who made Galactic Simulator 3

PcZ Games developed and self-published it. See more on the PcZ Games studio page.

Frequently asked questions

How much does Galactic Simulator 3 cost?

5.59 dollars on Steam.

Is Galactic Simulator 3 a strategy game?

It is closer to a simulation than a strategy game. You scan systems, gather samples and build outposts while civilisations rise and fall on their own, rather than commanding fleets.

What is the Great Filter?

The Great Filter is a proposed explanation for the Fermi Paradox: some stage between lifeless matter and galaxy-spanning civilisation is extremely hard to pass. The game uses it as its design premise.

Who made Galactic Simulator 3?

PcZ Games, who also self-published it.