Not right now — Steam does not list Celestarium as free to play, and none of the stores we track sells it in your region.

Can I play Celestarium on Mac?

Yes. Celestarium has a native macOS version on Steam.

Is Celestarium multiplayer?

No — Steam lists Celestarium as single-player only.

Is Celestarium on PC Game Pass?

No — Celestarium is not on PC Game Pass right now.

Celestarium

Celestarium Dev · Simulation, Space, Exploration, Sci-fi, Physics

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Prices last checked 28 Oct 2026, 03:47 UTC

No store is currently selling Celestarium. It was developed by Celestarium Dev. We keep tracking it across every store we cover, so set an alert below and you will know the moment it is on sale again.

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About Celestarium

✦ AI summary

Celestarium is a futuristic astronomy game where you start as an amateur stargazer observing the cosmos from your space station, then gradually build a sprawling space agency by selling discovery data, upgrading equipment, and launching missions to the planets you find. Progress from a lone astronomer to an aerospace mogul managing researchers, constructing rockets, and establishing colonies across the universe in this exploration and management sim.

Celestarium

A game about exploration and exploitation at every possible level. A futuristic astronomy game set in an alternate reality where you start as an amateur astronomer whose goal is to observe space and look out for planets.

Explore

Observe space from your high tech space station using an old telescope of yours. As you explore and discover various celestial objects, sell their data to corporates to earn money. You may use money to acquire better gear, such as more professional telescopes, which accelerate your exploration efforts even more.

Discover

Discover anything in the cosmos ranging from the smallest asteroids and dwarf planets to giant stars, supermassive blackholes and far away galaxies.

Expand

Start your own space agency and conduct astronomy missions. Hire and lead many astronomers, researchers and engineers to expand your presence in the industry. Manage the assets of your very own agency and play the game of high risks and high gains.

Prosper

Venture into aerospace business, build rockets from scratch and fly them to the planets you've discovered. Deploy a ton of satellites or probes, attempt landings and even start colonies. The universe of Celestarium has opened it's gates for you to prosper.

Celestarium — game info

Platforms: Windows, macOS, Linux / SteamOS
Player modes: Single-player
PC Game Pass: Not included

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