🛠️ Class of '09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6月
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6/27土✨ 新コンテンツThe Newest Chapter in the Class of '09 story!
There is a new Class of '09 game releasing 7-17-2026!Class of '09: Puzzle Showdown is chocked full of features entirely new to Class of '09. Quick-reaction gameplay, online multiplayer, 5 different ca…
2024年7月
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7/11木📢 お知らせJecka gets her own game!
If you loved Jecka from Class of '09 then you'll love her very own game... Class of '09: The Flipside. Get a peek at some other perspectives in the C09 high school as well as some insight into post gr…
2023年5月
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5/5金📢 お知らせClass of '09: The Re-Up - Now on Steam!
After 2 years the Class of '09 re up is here, appropriately titled Class of '09: The Re-Up. This title will feature a new batch of story stems totaling out to be twice the length of the first game. Ex…
2022年10月
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10/9日📢 お知らせClass of '09 Just Re-Graduated!
A little over a year has passed since the initial release of Class of '09 and the feedback/commercial success was so positive we felt it was right to give the playerbase a significant upgrade to the g…
2021年6月
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6/12土🛠️ パッチ / アップデートCUTSCENE ISSUES FIXED
Restart your Steam to trigger a Class of '09 update. A few streamers were having issues with the game when multitasking, issues like cutscenes popping up error messages or a black screen with just aud…
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。