🛠️ Tom Clancy's Rainbow Six Siege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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10/15木✨ 新コンテンツDESIGNER'S NOTES: Y11S3 MID-SEASON UPDATE
DESIGNER'S NOTES: Y11S3 MID-SEASON UPDATEIn this latest edition of Designer’s Notes, we'll take a deeper dive into the balancing changes introduced in the Y11S3 Mid-Season Update.WIN DELTA VS. PRESENC…
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10/15木✨ 新コンテンツPATCH NOTES: Y11S3 MID-SEASON UPDATE
See the upcoming changes to Rainbow Six Siege with the release of Y11S3.2.Y11S3.2 BALANCING PATCHRELEASE FOLLOW-UPNOORHORUS LANCE LAUNCHERDrilling time reduced on Ballistic Shields, soft surfaces, and…
2026年7月
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7/17金✨ 新コンテンツRainbow Six Siege Mid-Season Update: Everything You Need to Know
Operation System Override took Rainbow Six Siege by storm when it launched on June 2, bringing a major Dokkaebi rework, the new-yet-familiar Calypso Casino map, and a competitive overhaul with Ranked …
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7/15水✨ 新コンテンツDESIGNER'S NOTES: Y11S2.2 MID-SEASON UPDATE
In this latest edition of Designer’s Notes, we'll take a deeper dive into the balancing changes introduced in the Mid-Season Update.WIN DELTA VS. PRESENCE AND TOP OPERATOR BANS\ WIN DELTA VS. PRESENCE…
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。