Rainbow Six Siege Test Server Patch Notes For Operation Steel Wave: ACS12 Buff, Bug Fixes

Ubisoft is trying various changes to Rainbow Six Siege on its test server ahead of Operation Steel Wave, and we've got the latest patch notes.


Ubisoft recently revealed Operation Steel Wave, the Year 5, Season 2 update for Rainbow Six Siege that will introduce a panoply of new content to the game. This will include two new operators, the crowd-controlling Melusi and the breaching specialist Ace, as well as a new gadget for defenders called the proximity alarm. As part of this upcoming season, Ubisoft has tried out some changes to Siege on its test server, and we've got the full patch notes below.

The May 25 patch increased the damage of the ACS12 to make it more viable. It also fixed a nasty bug that caused gadget VFX effects to appear empty or missing. The May 26 patch dealt with some more technical issues, particularly two weapon animations not syncing up with their audio. Both patch notes include several known issues that have yet to be fixed, including areas of the House map that aren't supposed to be accessible to players.

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Now Playing: Rainbow Six: Siege - Operators And Everything New In Operation Steel Wave

Operation Steel Wave is set to release sometime in mid-June. In addition to all the features mentioned above, it will include a complete rework of the game's House map. In other Siege news, Ubisoft successfully removed a free-to-play mobile shooter from Google and Apple's mobile storefronts that the studio claimed was a copycat of Siege.

Rainbow Six Siege May 26 Patch Notes


  • FIXED - M4 reload animation and audio are slightly out of sync.
  • FIXED - If Maestro leaves the game, his Evil Eye windows are not opening to 50% in their disabled state.
  • FIXED - AK12 reload animation and audio are out of sync.
  • FIXED – Various LOD issues on maps.
  • FIXED – Various minor shop/UI fixes and improvements.


  • Doors and doorframes have extruding surfaces when they should be flat for better consistency.
  • Y5S2 Operators can be banned on the TS
  • Missing sound in support mode and observation tools
  • Players are unable to pick up Mozzie's Pests if they are deployed on the rug covering the stairs in House.
  • The Discovery playlist is missing a name on some UI elements in the main menu.
  • Defuser can be planted on the edge of the hatch in 2F Master Bedroom of House
  • Operator Models glow lightly when viewed from a distance
  • Shaky weapon sights while ADS when using some Anti-Aliasing settings, optic types, and cardinal camera orientation.
  • Players can get onto the white van in Garage of House

Rainbow Six Siege May 25 Patch Notes


ACS12 - Increased the damage from 41 to 59. Increased ADS Speed.

Slight buff to the ACS12's damage to make it a bit more viable than it is currently. ADS speed should also now match other weapons of the same category.


  • FIXED - VFX related to gadgets effects are missing or corrupt.
  • FIXED - Weapons clip through Defenders hands at spawn if a grip is equipped.
  • FIXED - ADS appears zoomed out for some sights on the P10 Roni.
  • FIXED - Amaru's reeling SFX is distorted/missing in replays.


  • FIXED - Echo's Yokai drone can lose signal and stop responding if deployed on top of the vents of 2F Printer Room in Kanal.
  • FIXED - Players are unable to pick up Mozzie's Pests if they are deployed on the rug covering the stairs in House.
  • FIXED - Lighting issues on House.
  • FIXED - Gadgets can be placed in unreachable areas of reworked House
  • FIXED - Operators can climb inside the book case in 2F Reading Room of House.
  • FIXED - A wall in 2F Pick Room of House cannot be reinforced in Hostage mode if player who spawns next to it does not move.
  • FIXED - Spawn kill from master bedroom of House rework.
  • FIXED - Spawn kill from EXT Construction on House rework.
  • FIXED - Various clipping issues on maps.
  • FIXED – Various LOD issues on maps.
  • FIXED - Various map asset issues.


  • FIXED - CPU Load displays 0% in the new advanced benchmark results report.
  • FIXED – Various minor cosmetic and shop UI fixes.
  • FIXED – Various minor cosmetic and shop UI fixes.
  • Bugfixes from May 21 are also back with this update.

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