Steam

Antimatter

Also known as Antimatter, a, antimatter

Antimatter is a sandbox strategy game, colonise planets, build your city on the surface or the underground. Build your spacestation or control your own spaceships to explore a huge and living galaxy !

Last update

6 Aug 2026

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Latest update

Patch notesPublished 08 Jul 2026

Roadmap to Demo 7

Demo 6 just ended today, as I decided to extend it by a few days due to some patches. This was another productive round. Much feedback was given on Discord, and some on the Steam forum as well. Demo 7, yet another play-…

4 changesGameplayUI/audioRead patch notes

Update history

Browse past updates and patch notes for this game.

25 updates

August 2026
PLAYTEST #7 Since last year, Antimatter has gone through six public playtesting sessions labelled as “demos.” They often lasted for a weekend and were intended to collect bug reports and feedback. While they provided in…7 changesServerGameplay7d ago
July 2026
Crew Recruitment, Fixed Buildings & Hotfixes (B0028)Fixed: Crash caused by module status overlay The game could crash/hang if the previously owned spaceship having module overlay was destroyed, also made the overlay more reliable. Overhauled crew transfer UI & profound c…Announcement3 changesFixPerformance06 Jul 2026
Trade hotfix (B0027)Fixed: 'Transfer' was the only possible action in space station inventory All spaceships and space stations were considered 'owned' by the player, preventing buying/selling.1 changeFix05 Jul 2026
Hello everyone, Demo 6 is now made available for the course of the weekend. This is, as ever, an alpha. --- An alpha version means that features remain incomplete, content may still be lacking, and the game may contain…16 changesGameplayUI/audio04 Jul 2026
April 2026
Debriefing for Demo 5 Demo 5 ends is 2 hours. Thank you all for the feedback and bug reports collected on Discord and Steam; my plate is full now. As I said in the video last week, this is the last alpha version primari…8 changesUI/audioGameplay27 Apr 2026
Demo 5 Released!A new alpha version of Antimatter is now available. This demo will be accessible for the next 48 hours. This version includes many changes and covers all items on the roadmap, except for the specimen feature. Additional…Announcement2 changesGameplay25 Apr 2026
February 2026
This is the first devlog for the Demo 5 Roadmap with the work done this week on terraformation, planet simulation and ore extraction and generation. Check Demo 5 roadmap here: https://store.steampowered.com/news/app/134…1 change15 Feb 2026
Demo 4 ends now, time for the Demo 5 roadmap. Many of you have generously invested time in improving the game through bug reports and feedback on Discord and Steam, thanks a lot! Stability & Bug Extermination Demo V4 si…16 changesPerformanceGameplay09 Feb 2026
B0024 - Multiple fixesMinor update. Added: Shortcut 'Home' key to lock on the currently player-controlled spacecraft/party. Tweaked: Intro message correction and additional info. Fixed: AI Strike missions failing, with extreme slow-down as a…15 changesFixGameplay08 Feb 2026
Minor update. Fixed: no equipment dock The universe lacked any equipment dock, required to change spacecraft modules, due to a bug introduced during the module overhaul. New ship module: Ship Equipment. Stations/colonie…6 changesFix07 Feb 2026
This update took slightly longer than initially planned, but more work was done too. Demo 4 is as usual, an alpha test round to hunt bugs and test new features. It will be available for the duration of the week-end. Rev…13 changesBalanceGameplay06 Feb 2026

Older updates

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Roadmap to Demo 7

August 2026

July 2026

April 2026

February 2026