Rainbow Six Siege (R6) Update 1.000.121 Patch Notes on Dec. 2, 2025

Ubisoft has released a new Rainbow Six Siege update 1.000.121 on PS5 and Xbox Series X/S. According to the official R6 update 1.000.121 patch notes, Operation Tenfold Pursuit delivers the 10-year anniversary overhaul with Thatcher’s Remaster, PMR90A2 marksman rifle, and major map updates led by the Fortress rework. Testing Grounds debuts alongside matchmaking refinements and a broad balancing pass. Apart from this, Rainbow Six Siege patch 1.000.121 also include Battle Pass improvements, progression updates, and extensive bug fixes.

Rainbow Six Siege update Y10S4 Patch Notes – December 2, 2025

R6 update 1.000.119 — R6 update 1.000.121

Summary of Key Changes

Operation Tenfold Pursuit celebrates the 10-year anniversary with Thatcher’s Remaster, new weapon PMR90A2, and the new E.G.S. Disruptor gadget.
Fortress rework enters all playlists alongside modernized Skyscraper and Theme Park.
Testing Grounds playlist launches with Armor & Speed experiments.
Major balancing overhaul: DSEG system update, Mute, Aruni, Castle, Hibana, Thermite, Maverick, Ace, and more.
Expanded QoL, progression improvements, and extensive bug fixes.

Operation Tenfold Pursuit Patch Notes

Anniversary Overview

Tenfold Pursuit Milestone

Marks the 10-year anniversary with large-scale gameplay, balancing, and systems upgrades.
Thatcher receives a full Remaster with expanded arsenal and a precision-focused disruption toolkit.

Thatcher Rework

Attacker Loadout Updates

Primary Weapons: L85A2, AR33, PMR90A2, M590A1.
Secondary: P226 Mk 25.
Gadgets: Breach Charge, Claymore.
Stats: ★★★ Health / ★★★ Speed.

Unique Gadget – E.G.S. Disruptor

Detects electronic devices through obstructions.
Deactivates electronics via EMP blast within the scanned area.
Reinforces Thatcher’s role as a frontline disruption Operator supporting team pushes.

ShieldGuard

Anti-Cheat Enhancements

Now updates twice a week for faster detection.
Enhanced recoil script detection tuned with pro player feedback.
Faster, smarter bans to maintain competitive integrity.

Map Maintenance

Fortress Rework

Modernized layout with fewer hallways and balanced bombsites.
Improved Attacker routes; courtyard converted to an exterior zone.
Added to all playlists including Ranked and Siege Cup.

Modernized Maps

Skyscraper and Theme Park receive upgraded lighting, shadows, 4K textures, and enhanced destructibility.

Playlists

Testing Grounds – New Experimental Playlist

Integrated directly into the game.
January 8–15 experiment: Adjustable Armor and Speed stats during Planning Phase.
Player feedback collected via survey to shape future design.

Ranked Matchmaking

Now considers Skill (primary), Visual Rank, and Squad Size.
Mixed-rank squads factor Max Rank and skill into matchmaking.

Map Pool Updates

Fortress replaces Emerald Plains in Ranked.
Fortress replaces Skyscraper in Pro League Preset.

Esports Tab

Predictions

Players make match predictions to earn rewards.
Accessible via Overview or Championship tabs.

Balancing

New Shared Weapon – PMR90A2

Added to Thatcher, Nøkk, Hibana, and Capitão.
Precision marksman rifle suited for aggressive overwatch control.

DSEG System Overhaul

Devices affected by a disable field cannot activate via wireless signals.
Operators within the field also lose activation capability.
Both Operator and device must exit the field for reactivation.

Operator Adjustments

Mute

Increased jammer radius.
Now only disrupts wireless-dependent devices.

Aruni

Surya Gates can be instantly deactivated by EMP Impact Grenades or Thatcher’s E.G.S. Disruptor.

Castle

Armor Panels can be electrified, improving anti-entry defense and tactical counterplay.

Ace

Speed reduced to 1; Armor increased to 3.
Gains Stun Grenades in loadout.

Hibana

X-Kairos auto-reloads after 0.4s; fuse time reduced 5s → 4s.
Gains Claymore as secondary gadget.

Thermite

Gains one additional Exothermic Charge.
ITA12S added as secondary.

Maverick

Breaching Torch no longer pauses.
Gains Frag Grenades and the Reaper MK2 secondary.

Ash

Breaching Rounds now interact with electrified surfaces, increasing counterplay.

Training & Onboarding

Mini-Map

Added to Enlisted, Field Training, Landmark Drill, and Clear House.
Displays walls, stairs, destructible elements, windows, and hatches on all floors.

Clear House

Formerly Target Drill; enhanced with Keres Legion AI capable of flanking and pressure tactics.

Bot Teammates

Enlisted and Field Training now support 5v5 with bot teammates for both sides.

Dual Front

Neutral Sector Assignment

Hostage assignment returns with a new VIP to defend and extract.

Operator Pool Update

Rotating In: Thermite, IQ, Buck, Blackbeard, Nøkk, Kali, Grim, Tachanka, Jäger, Echo, Zofia, Vigil, Melusi, Mira, Zero
Rotating Out: Ash, Capitão, Hibana, Maverick, Nomad, Ace, Osa, Pulse, Kapkan, Frost, Maestro, Warden, Wamai, Aruni, Azami

Abandon Penalties

Leaving matches now impacts Reputation unless players reconnect.

Battle Pass

Early Weapon Access

Premium Pass owners receive early access to the season’s new weapon, exclusive skin, and a limited-time challenge.

Delta Packs

Replace Bravo Packs; include exclusive items such as a recolored MPX Masterpiece skin.

Seasonal Camo Skins

Tenfold Pursuit camos available all season; permanently unlocked once purchased.

Operator Price Decreases

Solis: 10,000 Renown / 240 R6 Credits.
Tubarão: 15,000 Renown / 360 R6 Credits.

Additional Updates

Audio

Thorn and Blackbeard added to Conversation System.

Accessibility

New controller and M&K input layout presets in Options menu.

Bleeding Rework

Downed players begin in slow bleeding; speeds up only while moving.

Long-Term Progression

Career menu splits Dual Front and Core Siege stats.
Specialty challenges between Clearance 16–20 unlock Operators or grant renown.
Gold 1+ Ranked players earn exclusive Hibana headgear.
Up to 5 bookmarkable challenges in Core Siege HUB.
“Mark All as Seen” simplified.

Bug Fixes

Gameplay

Fixed ally spectating issues in Dual Front.
Fixed Evil Eye placement exploits and wall visibility.
Fixed defuser pickup blocking, gadget interactions, AI behavior bugs, PMR90A2 inconsistencies, and accelerated weapon swap delays.

Level Design

Fixed hook placements and hatch destruction inconsistencies across Modernized maps.

Operators

Fixed shield headshot issue for Clash.
Fixed redeploy, device orientation, interaction, and visibility bugs for multiple Operators.

User Experience

Fixed Welcome Mat animation bug, texture issues, UI pack browsing errors, and reward modal inaccuracies.

Audio

Fixed Solis SPEC-IO audio triggering at round start.

Previously, a big season update added a new defender Azami (Kiba barrier gadget). Recently, a hotfix Y7S1.2 was also released. Unfortunately, players are still experiencing issues with the game. Today’s R6 Siege patch 1.000.121 will fix a few of these issues.

Download free Rainbow Six Siege patch 1.000.121 on PlayStation 5 and Xbox Series X/S.