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Stellaris

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🛠️ Stellaris update history

Official announcements the developer posts on Steam—patches, new content, and events—sorted by date. Click a title to read the full post.

Latest update · 23 hours ago
🛠️ Stellaris 4.5.2 released [checksum 9776] Version 4.5.2
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October 2026

  • 10/6Tue
    🛠️ Patch / update v4.5.2
    Stellaris 4.5.2 released [checksum 9776]

    Hello Stellaris Community! Stellaris 4.5.2 "Cygnus" has now released on Steam, GOG and Microsoft store. Thanks to everyone who submitted bug reports during the hotfix period. Your bug reports go a lon…

  • 10/1Thu
    🛠️ Patch / update v4.5.2
    Stellaris Dev Diary #434 - 4.5.2 'Cygnus' Tentative Patch Notes

    by Alfray StrykeHey folks, unfortunately Eladrin's been off ill this week, so we don’t have a full Dev Diary for this week. However I do have tentative patch notes for the 4.5.2 patch to share with yo…

September 2026

  • 9/24Thu
    🛠️ Patch / update v4.5.1
    Stellaris 4.5.1 released (checksum 358e)

    by EladrinHello, Stellaris community! We've updated Steam and GoG with a hotfix to address a few important issues. MS will follow as soon as it is possible. 4.5.1 ‘Cygnus’ Hotfix Release Notes​Balance…

  • 9/22Tue
    🛠️ Patch / update v4.5
    Stellaris 4.5 "Cygnus" now available!

    Hello Stellaris Community, We’re pleased to announce that the 4.5 “Cygnus” update is now available! Before we dive into what’s included in this update, we want to talk about who put it there. Of the 5…

  • 9/17Thu
    🛠️ Patch / update v4.5
    Stellaris Dev Diary #433 - 4.5 'Cygnus' Preliminary Release Notes

    by EladrinThe Stellaris 4.5 ‘Cygnus’ Open Beta is drawing to a close, and we’re currently building a release candidate.We’ve temporarily pulled Exclusive Harvesting Rights from 4.5 - your feedback fro…

  • 9/15Tue
    📢 Announcement
    Mammalian Science Ship Brickset and Bubbles Cantina Puzzle now available!

    Bricks and Puzzle pieces have entered the galaxy! Together with YouTooz, we're thrilled to release our first-ever Brickset and Puzzle inspired by Stellaris. Give your shipyards a rest, and construct y…

  • 9/10Thu
    🛠️ Patch / update v4.5
    Stellaris Dev Diary #432 - Yet More About 4.5 'Cygnus'

    by EladrinHello everyone, I’m back this week, though it’ll be a relatively short one. Last week Alfray mentioned that I might be ready to share information about the 4.5 ‘Cygnus’ release date, but I’m…

  • 9/3Thu
    🛠️ Patch / update v4.5
    Stellaris Dev Diary #431 - 4.5 'Cygnus' Development Continues to Continue

    by Alfray StrykeHey folks, I’m taking over for Eladrin this week since he’s swamped with meetings and I got voluntold for Dev Diary Duty. The final 4.5 build isn't ready to ship, but we did push an Op…

August 2026

July 2026

  • 7/25Sat
    📢 Announcement
    VIR Vinyl Figure LIMITED EDITION | Makeship x Stellaris

    This VIR spent millions of playthroughs helping empires rise — and decided Earth was worth the trip.No demands, no housing needed, no secret bid for power.Just an 8.5cm advisor ready to move in.Availa…

  • 7/15Wed
    🛠️ Patch / update v4.5
    Stellaris 4.5 'Cygnus' Open Beta Update 4 (e6fd)

    by EladrinHello everyone! We've got a couple more fixes in today's 4.5 Open Beta update: Stellaris 4.5 'Cygnus' Open Beta Update 4Bugfix​Fixed Precursor dig sites (Vultaum, Yuht, First League, Irassia…

  • 7/10Fri
    🛠️ Patch / update v4.5
    Stellaris 4.5 'Cygnus' Open Beta Update 3 (aa56)

    by EladrinHappy Friday! We've updated the stellaris_test_4.5 branch again today, and added a rollback branch (stellaris_test_4.5_rollback) just in case, since this one modified a few hundred events. S…

Source: official Steam announcements (updated every 6–24 hours). Titles and summaries are copyright of the original developers.