🛠️ Stellarisのアップデート履歴
開発元がSteamで公開した公式告知（パッチ、新コンテンツ、イベント）を時系列でまとめています。タイトルをクリックすると全文を読めます。
2026年10月
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10/6火🛠️ パッチ / アップデート v4.5.2Stellaris 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…
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10/1木🛠️ パッチ / アップデート v4.5.2Stellaris 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…
2026年9月
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9/24木🛠️ パッチ / アップデート v4.5.1Stellaris 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 NotesBalance…
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9/22火🛠️ パッチ / アップデート v4.5Stellaris 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…
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9/17木🛠️ パッチ / アップデート v4.5Stellaris 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…
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9/10木🛠️ パッチ / アップデート v4.5Stellaris 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…
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9/3木🛠️ パッチ / アップデート v4.5Stellaris 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…
2026年8月
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8/27木🛠️ パッチ / アップデート v4.5Stellaris Dev Diary #430 - 4.5 ‘Cygnus’ Development Continues
by EladrinWe have another update to the 4.5 ‘Cygnus’ Open Beta planned for today! 4.5 Update 7 contains fixes for Nascent Stage (again), some AI updates, and more.Stellaris 4.5 ‘Cygnus’ Open Beta Upda…
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8/13木🛠️ パッチ / アップデート v4.5Stellaris 4.5 'Cygnus' Open Beta Update 5 (bc43)
by EladrinHello everyone! We've updated the 4.5 Open Beta branch with some improvements.Stellaris 4.5 'Cygnus' Open Beta Update 5 Release NotesFeatureFlag emblems are now correctly centered within th…
2026年7月
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7/15水🛠️ パッチ / アップデート v4.5Stellaris 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 4BugfixFixed Precursor dig sites (Vultaum, Yuht, First League, Irassia…
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7/10金🛠️ パッチ / アップデート v4.5Stellaris 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…
出典：Steam公式告知（6～24時間ごとに更新）。タイトルと概要の著作権は各開発元に帰属します。