Patch Notes

  • All Patch Notes

 

Patch Date and Time - Sept 22nd, 2026 @ 10AM - 1PM PACIFIC



Greetings MechWarriors!

 

This month’s update includes the release of the Corvus, quirk adjustments, and more!

As always, a 2 week in-game Patch Science Sale will go live shortly after the patch and include all applicable items for testing.

'Mechs in-game and new 'mechs releasing are subject to future balance changes and tuning, so get out there and do the science so we can hear your feedback!

 

Ashes and Ascension Wishlist Rewards

MW5 Mercs has had its ninth DLC announced! Head over to the wishlist thread to claim your special Stone Rhino SR-2(S)! This variant of the SR-2 carries the Smoke Jaguar Delta Galaxy skin from MW5 Mercs.


 

Corvus legend

Carrying a new piece of special equipment, the Corvus' special UAC Speed Loader allows Ultra Autocannons to fire twice on cooldown instead of once! The UAC Speed Loader cannot be transferred via omnipods and is locked to the SCR-COR variant.

The Stormcrow Corvus Legendary Mech will be available through Steam and the MWO store


 



Store Changes

  • Annihilation Booster Pack available for C-Bills

 

Quirk Changes

Raven

  • RVN-H

    • Increased MG RoF to 50% (from 25%)

    • Increased SRM Velocity to 100% (from 50%)

Centurion

  • CN9-AH

    • Increased UAC Jam Chance to -40% (from -20%)

    • Added 100% Ballistic Ammo

  • CN9-YLW2

    • Added 100% UAC10, LBX10, and AC10 Ammo

Griffin

  • All Variants

    • Removed All Structure Quirks

    • Added 15 CT LT RT LA RA LL RL Structure

    • Added 10 CT Armor

    • Increased RA/LA Armor to 20 (from 10)

  • GRF-1N

    • Added 30 RT Armor

    • Increased Weapon Velocity to 40% (from 25%)

  • GRF-1S

    • Added 20 LT Armor

    • Increased Missile Cooldown to -30% (from -10%)

  • GRF-3M

    • Added 30 RT Armor

    • Increased Missile Spread to -25% (from 10%)

  • GRF-2N

    • Added 10 RT/LT Armor

    • Added 20% Missile Range

  • GRF-5M

    • Added 30 RA Armor

    • Added -20% Ballistic Cooldown

    • Added 50% Ballistic Ammo

  • GRF-1E

    • Increased PPC Velocity to 30% (from 10%)

    • Increased Cooldown to -10% (from -5%)

  • GRF-AR

    • Increased RA/LA Armor to 30 (from 20)

Kintaro

  • All Variants

    • Added 7.5% Speed Tweak

Wolverine

  • All Variants

    • Added -50% JJ Heat

    • Added 50% JJ Burn Time / Increased JJ Burn Time to 50% (from 15%)

  • WVR-6K

    • Removed -10% Laser Cooldown

    • Removed -12.5% Pulse Laser Heat

    • Removed 10% Pulse Laser Range

    • Increased Heat to -25% (from -10%)

    • Increased Laser Duration to -20% (from -10%)

    • Added -40% Missile Cooldown

  • WVR-7K

    • Added -25% Spread

    • Added 50% SRM Range

    • Added 50% MRM Range

  • WVR-7D

    • Removed -30% RAC Ramp Down

    • Removed 10% Ballistic Velocity

    • Increased Jam Chance to -100% (from -40%)

    • Increased Velocity to 20% (from 10%)

    • Increased RA Armor to 25 (from 18)

    • Added 18 RA Structure

    • Added 100% RAC and UAC Ammo

Catapult

  • CPLT-C1

    • Increased Missile Velocity to 40% (from 10%)

  • CPLT-C2

    • Increased Spread to -20% (from -10%)

Jagermech

  • JM6-A

    • Removed 10% SRM Range

    • Removed 10% Streak Range

    • Removed 10% Ballistic Range

    • Increased Range to 30% (from 10%)

    • Increased Velocity to 50% (from 10%)

  • JM6-DD

    • Added -20% Jam Duration

  • JM6-S

    • Removed -15% Ballistic Cooldown

    • Removed 15% STD AC Velocity

    • Added -15% Cooldown

    • Added 15% Velocity

  • JM6-DE

    • Added -50% Spread

    • Added 20% LBx Range

  • JM6-FB

    • Removed -20% Energy Range

    • Removed -10% Energy Heat

    • Removed -10% Ballistic Cooldown

    • Removed -20% Energy Cooldown

    • Increased Range to 15% (from 10%)

    • Added -15% Cooldown

    • Added -15% Heat

Cataphract

  • CTF-1X

    • Add 25% STD AC Range

  • CTF-2X

    • Added -50% Spread

  • CTF-3D

    • Added PPC Family HSL +1

  • CTF-3L

    • Added 12.5% Speed Tweak

  • CTF-4X

    • Removed 15% Ballistic Range

    • Added 25% Range

    • Added 50% Ballistic Ammo

  • CTF-0XP

    • Added Laser HSL+2

  • CTF-IM

    • Increased Speed Tweak to 7.5% (from 5%)

Summoner

  • SMN-PRIME

    • Increased Energy Heat in CT -20% (from -15%)

  • SMN-M

    • Increased Heat Dissipation in CT to 15% (from 10%)

    • Added -10% Spread to CT

    • Added 75% Initial Jumpjet Thrust to CT

Sun Spider

  • SNS-PRIME

    • Added -20% Spread to CT

    • Added 7.5% Speed to CT

  • SNS-A

    • Added 50% Ballistic Ammo to CT

  • SNS-B

    • Added -10% Energy Heat to CT

  • SNS-C

    • Added Missile HSL +1 to CT

    • Added SRM HSL +1 to CT

  • SNS-D

    • Removed -25% UAC Jam Chance from So8

    • Added -25% UAC Jam Chance to CT

  • SNS-ML

    • Added Energy HSL+1 to CT

  • SNS-VG

    • Added 30% Weapon Velocity to CT

  • SNS-AMB

    • Added 30% Medium Laser Family Range to CT

Night Gyr

  • NTG-B

    • Removed 10% Ballistic Velocity from So8

    • Reduced Velocity to 10% in CT (from 15%)

  • NTG-C

    • Reduced Range to 12.5% in So8 (from 15%)

  • NTG-JK

    • Added -10% Heat to So8

Awesome

  • All Variants (including Clan Awesome)

    • Added 10% Heat Dissipation

Cyclops

  • All Variants (minus Sleipnir)

    • Increased CT Structure to 18 (from 14)

    • Increased LT/RT Structure to 18 (from 10)

 



Patch Files (Direct Download) 

To make the patching process easier for players with limited download caps, we'll be providing direct download links for the patch file(s) that comprise this patch. This will allow you to download the patch file(s) elsewhere, for manual injection into the MWO patcher through a Patch Cache folder.

Aside from allowing you to download the patch file(s) elsewhere, on another connection, there are no additional benefits to performing the patch this way; the patching process itself will be the same.

This direct patch download process will only work for players running the standalone client. It does not apply to players running MWO through Steam.

Version: v1.4.339.0
Patch File(s): http://patcher.mwomercs.com/patch/Production/frontend/FrontendPatch_461.zip

  • Download the above file(s)
  • For sake of ease, we recommend creating a dedicated folder for the patch file(s), such as 'MWO Patch Cache'
  • You do not need to unzip or unpack the patch file(s)
  • Launch the MWO Portal
  • Select the three horizontal lines in the top left of the Portal Window
  • Choose the 'Specify Patch File Cache' option
  • In the field that appears, paste or enter the location in which you saved the patch file(s) and hit OK
  • For example, C:\Users\<username>\Documents\MWO Patch Cache
  • Click the blue Patch button

The launcher will now check the Patch Cache folder you defined. If it locates the required patch files, it will unpack and use those files to apply the patch

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