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94% positive of 72 · Very Positive · Live from Steam
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Free on Steam. The demo has its own app, so its players are counted separately.
High-stakes, turn-based 4X space strategy distilled into intense matches of about an hour. Lead one of six premade factions, or design your own, against an AI that plays to win. Randomized techs, anomalies, maps and victory conditions make every match unique.
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Review score: 94% on 2026-11-02 → 94% today (72 reviews)
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Works, but may need extra effort. Results from Valve's own testing.
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2 items on Steam, newest first.
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.
Changed: Windows, Linux, Mac (3 downloads)
Public branch for testing builds before they are released
Public translation testing
Version 1.1 if you want to complete old save games or just want to go back
Version 1.0 if you want to complete old save games or just want to go back
Astro Protocol 1.3 launches on Wednesday, November 18.1.3 is the biggest update since launch: two new major factions, translations to 13 languages, new and rebalanced faction traits, new techs and a new game length setting.Two New FactionsTwo new major faction…
Fixes Fix issues with stranded trader convoy and observation world anomalies Fix an issue with hub planet not extending network immediately Fix an issue with end turn shown while unskipped ships still have AP Fix an issue where pursuit vector resets AP to 1 wi…
Features Show release dates in the changelog Prefill the bug report form with build and platform details Fixes Fix duplicate tech name Fix non-square tech/upgrade/faction icons overflowing
Fixes Fixed an issue that caused the AI to waste resources
Features Rebalance the Allies victory condition targets Center the camera on a faction's home planet on click Show an attacks-spent indicator on units that can still move Show changelog and changes since last played in main menu Fixes Fix stranded traded convo…
Features Add mixed custom & basic faction line-up to weekly challenge Improve AI speed Sort minor factions menu by known/defeated status Fix issues with network boost movement range calculation Rebalance Corsair to 1 energy upkeep, 6 energy build cost Fixes Fi…
Astro Protocol 1.3 launches on Wednesday, November 18. Today we're revealing the first of its two new factions: the Fleetmasters. They're based on Matt "Vinco" Taylor's design, which won our Custom Faction Contest.The FleetmastersScorching and barren, Husk off…
The translations beta is open, and anyone who owns the game can try it. Along with English, you can now play in:FrenchGermanPolishSpanish (Spain)Brazilian PortugueseItalianTurkishUkrainianRussianSimplified ChineseJapaneseKoreanHow to get the translationsThe tr…
I am running an experiment, and I would like the community's help with it and the community's verdict on it. The question is this: can an AI translation, corrected by the players who speak the language, be good enough to put in the game? There is now a test bu…
I will streaming in 18.30 UTC. Just playing some Astro Protocol and hanging out. Come join if you have any questions or just want to see me lose to the AI. 😄 Watch on Twtich: -Zeikko
Sami Rouhiainen, the artist behind Astro Protocol's anomaly illustrations, is at Ropecon in Helsinki, Finland on Friday 24 July Messukeskus, Hall 6, Area E217. Friday only, so catch him while he's there.He's selling art posters, including the derelict ships, a…
The votes are in. Here are your winners:🥇 The Fleetmasters by Vinco 🥈 Lumenovis Enclave by Anoc tied with The Recyclers by ShadowTiger, Helios Dominion by fauxsoleil and Takarajin by AILYes, that's a four-way tie for second place. And yes, one of the fourth-…
Custom factions are here, and now we want to see what you build with it. Submit your own custom faction, and we'll pick up to 3 community designs to implement directly into Astro Protocol.Design your faction and submit it here: https://factions.nullvectorstudi…