🛠️ 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9月
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9/23水📢 お知らせA New Kind of Competition Arrives in Siege
Wasteland Circuit Is Here The race is on. For the first time in Rainbow Six Siege, drones take center stage in a brand-new limited-time event. Race through custom-built tracks filled with obstacles, s…
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9/23水🛠️ パッチ / アップデートY11S3.1 PATCH NOTES
See everything included in the Y11S3.1 update.REFINEMENT CHANGESThese are small adjustments that don’t aim to alter an Operator’s overall power level or flexibility. Instead, they focus on polishing g…
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9/18金🎉 イベントSave up to 90% on games during the Ubisoft 40th Publisher Sale!
Until October 1, join us in celebrating 40 years of gaming! Save up to 90% on top games and DLC, including Rainbow Six Siege and more. https://store.steampowered.com/app/359550?utm_source=partner-site…
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9/8火📢 お知らせ3v3 Arcade Is Here. Squad Up and Jump In
A Fresh Way to Play Siege Available from September 8 to September 21, the new 3v3 Arcade limited-time mode introduces a faster and more accessible way to experience Rainbow Six Siege. Built around sma…
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9/2水📢 お知らせR6S Community Checkpoint [REPLAY] - Gamescom Day 4
Join us for a replay of the Rainbow Six Siege Community Checkpoint. Recorded LIVE on Day 4 of Gamescom 2026.
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9/1火🛠️ パッチ / アップデートY11S3 PATCH NOTES ADDENDUM
You can find here the updates and fixes made over the course of the Y11S3 Season Test Server.BUG FIXESGAMEPLAYFixed – AI training bots will try to break Azami's Kiba Barriers instead of navigating aro…
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9/1火📢 お知らせNoor Arrives in Operation Split Fire
Operation Split Fire Is Live Year 11 Season 3 has arrived. Step into Operation Split Fire and experience new tactical opportunities with Noor, Rainbow Six Siege's first Egyptian Defender. Armed with t…
2026年8月
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8/27木📢 お知らせTom Clancy's Rainbow Six Tactics Is Revealed
TACTICAL. TURN-BASED. RAINBOW SIX. Tom Clancy’s Rainbow Six Tactics is a single-player, turn-based tactical game set in the iconic Rainbow Six universe. Step into the role of commander, rebuild the un…
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8/26水📢 お知らせDon't miss Rainbow Six Siege Live at Gamescom!
Rainbow Six Siege takes center stage at Gamescom 2026. Join us for a dedicated afternoon packed with developer insights, community activities, and special guests live from the Ubisoft Community Lounge…
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8/17月📢 お知らせY11S3 DESIGNER'S NOTES
In this latest edition of Designer’s Notes, we'll go into more detail about the balancing changes coming with Y11S3 and share insight into the reasons behind them.WIN DELTA VS. PRESENCE AND TOP OPERAT…
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8/16日📢 お知らせOperation Split Fire Revealed
Operation Split Fire Operation Split Fire introduces a new chapter for Rainbow Six Siege. From the arrival of Noor to the launch of Legend Division, targeted map updates, and new gameplay experiences,…
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8/5水📢 お知らせRengoku Returns: Battle for Glory from August 5 to August 26
Rengoku Is Live From August 5 to August 26, step into a renewed Rengoku experience. Face supernatural forces, seize powerful rewards, and fight for control in battles shaped by myth and legend. A Skys…
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8/4火🛠️ パッチ / アップデートY11S2.3 PATCH NOTES
See the upcoming changes with the release of Y11S2.3.CHANGES TO OPERATORSHIBANA"Hibana's X-Kairos already offers a high degree of flexibility, but deploying pellets can sometimes leave her exposed for…
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…
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