patch · December 2, 2025

Rainbow Six Siege Y10S4 Patch Addendum Reduces Install Size and Fixes Exploits

The Rainbow Six Siege Y10S4 patch addendum slashes install sizes by up to 35 GB on PC and resolves dozens of gameplay exploits, map clipping issues, and operator bugs.

A patch addendum for Operation Tenfold Pursuit following the Y10S4 Test Server phase brings storage optimizations and bug fixes.

Storage Optimizations

Players will see a reduction in game footprint. The update introduces file optimizations that shrink the overall install size by roughly 15 to 20 GB on consoles and up to 35 GB on PC.

Gameplay and Exploit Fixes

Several map and gadget exploits are closed. Maestro's Evil Eye can no longer be placed in hard-to-reach spots in the B1 Diving Room on Kanal or spotted through walls by its laser glow. Azami's Kiba Barriers no longer grant unintended rooftop access via the 2F Logistic Office hatch on Clubhouse, and Attackers can no longer trigger Denari's T.R.I.P connectors through walls.

Operator Adjustments

Clash can no longer be shot in the head through her shield while sprinting up stairs. Aruni's Surya Laser Gate no longer detects players from unintended ranges on breakable walls or inflicts friendly fire damage on Aruni herself. Kapkan's Entry Denial Devices stop deploying facing the wrong way, and Dokkaebi no longer freezes inside observation tools after hacking phones.

Weapons and UI

Weapon tuning addresses the PMR90A2, which possessed an abnormally low damage drop-off compared to other Designated Marksman Rifles, alongside fixing a hipfire spread decrease while prone and an accelerated weapon swap delay. Quality-of-life fixes resolve Frost's Welcome Mat remaining visually stuck on revived operators and incorrect clearance level reward modals.

Why this patch matters

This addendum delivers cleanup for Operation Tenfold Pursuit, removing map exploits and tightening operator consistency while offering hard drive savings.