Last 7 days
Screenshots, achievements, specs, every price change and sale we've seen on Steam, and trading cards.
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Steam prices for United States (change the country in the top bar), and Steam keys from authorized stores.
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43% positive of 23 · Mixed · Live from Steam
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"Sirius-4" is a plot-oriented space simulator that gives the player complete freedom of action as a hired pilot of the "Sirius" unit. The action takes place on the outskirts of human space during a turbulent time for the galaxy after a global war.
Live data from Steam, tracked by SteamPlayerBase.
Not tested by Valve yet. Results from Valve's own testing.
Valve hasn't published test details for this game.
No authorized Steam key store lists this game right now.
What changed on Steam for this game since we started following it: prices and sales, builds, name, release date and review score.
Review score: 43% on 2026-11-01 → 43% today (23 reviews)
Every build released on Steam for this game since we started tracking it, with the developer's patch notes. Updated within minutes of each new build.
- A global AI has been introduced, triggering an enemy invasion scenario in all star systems. Now you can participate in battles for the system: defend it or lose it, as well as recapture points that have already been captured, destroying enemy stations and sh…
In this update, we have:- Fixed an issue that caused the game to freeze on high-resolution and 4K monitors. - Fixed critical bugs to improve stability. - Optimized the universe and location generation processes for faster loading and smoother performance. - En…