PATCH NOTES - MAY 19th 2026

Patch Date and Time - May 19th, 2026 @ 10AM - 1PM PACIFIC
Version Number: TBD
Size: TBD
Please note that due to compression differences Steam patch size may be larger than the standalone client patch size.
Patch Files (Direct Download) - TBD

Greetings MechWarriors!

This month’s update includes the release of the Tournament Supporter Pack, 'mech adjustments, 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!

The MechWarrior Online Team

Tournament Supporter Pack

This patch will release the 2026 Tournament Supporter pack for the yearly championship series ran by Mechwarrior Online Comp! Stay tuned for a post outlining all the details for this years Championship Series!

LOCUST

CRAB

MARAUDER

TIMBERWOLF

KODIAK

MechWarrior 5 Wishlist Hunchback

For all the players who wishlisted and posted in the wishlist thread, the Hunchback HBK-AZ will be launching this patch!

Weapon Changes

• Reduced Arrow IV projectile health to 25 (from 35)

• Reduced Arrow IV damage to 12 with 6.5 splash (from 13/7.5)

You all have made your voices loud and clear about the power level of Arrow IVs and we have been seeing the same thing on our end. Our usual cadence is slow and measured changes across multiple patches to prevent overreactions or slapstick changes that don’t land where we want them to. However, given the current state of the game and the overwhelming discontent of the player base, we felt it was best to give Arrows a strong and decisive nerf (we would have preferred to do this last patch, but we didn’t have enough time to deliberate and come to a proper solution). While the railgun capacitors needed technical adjustments to the game that required time to implement, there are no holdups with the Arrows. There is a possibility that Arrows may become slightly under performing after this patch. If that is the case, we will slightly buff them in future patches.

Store Changes

• Shadow Hawk IIC released for C-Bills

Quirk Changes

Urbanmech

• UM-AIV

• Increased Missile Velocity to 25% (from 20%)

Mad Dog

• MDD-V

• Removed -15% Missile Cooldown from So8

Catapult

• CPLT-C3

• Added 20% Missile Velocity

Longbow

• LGB-8V

• Removed -15% Cooldown

Zeus

• ZEU-6S

• Added -15% Cooldown

• Added -50% Spread

• Increased Heat to -20% (from -10%)

• Increased Missile Velocity to 100% (from 40%)

• Removed 10% Weapon Velocity

• Removed -15% Ballistic Cooldown

• Removed -15% Missile Cooldown

• Removed -10% Thunderbolt Cooldown

• Removed 5% Thunderbolt Velocity

• Removed -10% Missile Spread

• ZEU-6T

• Removed 10% Energy Range

• Removed 10% PPC Velocity

• Removed -15% Missile Cooldown

• Increased Heat to -20% (from -10%)

• Added -15% Cooldown

• Added -50% Spread

• ZEU-9S

• Removed -10% Energy Cooldown

• Removed 10% Energy Range

• Removed -15% Missile Cooldown

• Removed -10% Missile Spread

• Increased Missile Velocity to 100% (from 40%)

• Added -50% Spread

• Added -15% Cooldown

• Added 10% Range

• ZEU-5S

• Removed 7.5% Top Speed

• Removed -15% Ballistic Cooldown

• Removed -30% UAC Jam Chance

• Removed 5% Energy Range

• Removed -5% Missile Spread

• Removed 10% Missile Velocity

• Increased Heat to -15% (from -10%)

• Added -50% Spread

• Added -15% Cooldown

• Added -100% Jam Chance

• ZEU-9S2

• Removed 7.5% Top Speed

• Removed 10% Weapon Velocity

• Removed 10% Energy Range

• Increased Heat to -15% (from -10%)

• Increased Laser Duration to -50% (from -10%)

• Added -50% Spread

• ZEU-M

• Removed -15% Missile Cooldown

• Removed -10% Missile Spread

• Increased Heat to -10% (from -5%)

• Increased Missile Velocity to 100% (from 40%)

• Added -50% Spread

• Added -15% Cooldown

• ZEU-SK

• Removed -15% Ballistic Cooldown

• Removed 10% Ballistic Velocity

• Removed -15% Energy Cooldown

• Removed STD/ER Laser Duration -10%

• Removed -5% Missile Spread

• Removed 10% Missile Velocity

• Added -20% Spread

• Added -15% Cooldown

• Added 7.5% Top Speed

Highlander

• HGN-732

• Added Energy HSL +1

Mauler

• MAL-MX90

• Reduced Cooldown to -10% (from -20%)

• Added -10% STD AC Cooldown

Executioner

• EXE-PRIME

• Reduced Ballistic Cooldown in LT to -5% (from -7.5%)

• Increased Cooldown in So8 to -22.5% (from -20%)

• EXE-B-A

• Reduced Ballistic Cooldown in LA and RA to -2.5% (from -5%)

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.

Patch File(s): TBD

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