Patch Notes

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PATCH NOTES - JUNE 23rd 2026

Patch Date and Time - June 23rd, 2026 @ 10AM - 1PM PACIFIC
Version Number: 1.4.334.0
Please note that due to compression differences Steam patch size may be larger than the standalone client patch size.
Patch Files (Direct Download) - http://patcher.mwomercs.com/patch/Production/frontend/FrontendPatch_458.zip


Greetings MechWarriors!

This month’s update includes the release of the Sunder, '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


New CHASSIS Sunder

Preorder the Sunder!

A long awaited staple of Inner Sphere OmniMechs, the Sunder has finally arrived to MWO!

SD1-O


SD1-OA


SD1-OB


SD1-OC


SD1-OD and SD1-OD(S)


SD1-OE


SD1-OX


SD1-O-SAM (Samual)



Weapon Changes

  • Changed Thunderbolt max height to 70 (from 60)

  • Changed LRM max height to 185 (from 150)

  • Changed ATM max height to 51 (from 45)

  • Increased ATM3 Direct Fire Spread to 3.45 (from 2.75)

  • Increased ATM6 Direct Fire Spread to 4.12 (from 3.3)

  • Increased ATM9 and ATM12 Direct Fire Spread to 4.8 (from 3.85)

The Direct Fire Spread impacts both dumb fire and lock on fire with line of sight or TAG/Narc on target.

  • Changed LRM, ATM, Thunderbolt, and Arrow IV flight path to reach max height quicker. This both will ease the angle of approach and reduce their ability to arc over defending cover along with sharpening their launch angle to help clear early obstacles. This will impact both direct and indirect fire.


 

Map Changes

  • Polar Highlands Classic removed from quick play map rotation. This map can still appear in private lobbies, event queue, and faction play.

 

Store Changes

  • Icons 2 pack mechs released for MC

  • Naga released for MC

  • 2026 loyalty mechs released for C-Bills

 

Mech Changes

  • Increased LCT-3M deceleration to 190 (from 178.75)

  • Increased LCT-3M turn rate to 126.62 (from 124.33)

  • Increased LCT-3M twist rate to 225 (from 207)

 

Quirk Changes

Locust

  • LCT-3M

    • Increased Laser Duration to -30% (from -20%)

    • Increased Heat Dissipation to 10% (from 5%)

  • LCT-3S

    • Increased SRM/SRMA Ammo to 150 (from 120)

    • Added 10% Range

  • LCT-1M

    • Increased RA, LA Armor to 11 (from 8)

    • Increased CT, RT, LT Structure to 11 (from various values)

Hatchetman

  • HCT-3F

    • Increased CT, RT, LT Armor to 24 (from 16)

    • Increased RA, LA, RL, LL Armor to 18 (from 12)

  • HCT-5S

    • Increased CT, RT, LT Armor to 24 (from 16)

    • Increased RA, LA, RL, LL Armor to 18 (from 12)

  • HCT-6D

    • Increased CT, RT, LT Armor to 24 (from 16)

    • Increased RA, LA, RL, LL Armor to 18 (from 12)

  • HCT-5K

    • Increased CT, RT, LT Armor to 24 (from 16)

    • Increased RA, LA, RL, LL Armor to 18 (from 12)

  • HCT-7R

    • Increased CT, RT, LT, LA, RL, LL Armor to 12 (from 8)

    • Increased RA Armor to 32 (from 24)

  • HCT-TM

    • Increased CT Armor to 20 (from 16)

Centurion

  • CN9-A

    • Removed -15% Ballistic Cooldown

    • Added 100% Ballistic Ammo

    • Added 100% Missile Ammo

  • CN9-AL

    • Removed 20% PPC Velocity

    • Removed 10% Missile Velocity

    • Added 20% Velocity

    • Added +1 Energy HSL

  • CN9-YLW

    • Added -6.25% Energy Cooldown

    • Patch notes: This will sync up Snub PPC cooldown with AC20 cooldown.

Crab

  • CRB-M

    • Added -10% Heat

    • Added -20% Spread

Hellbringer

  • HBR-PRIME

    • Increased RT Armor to 16 (from 8) in RT

    • Added 8 Armor to LT in LT

  • HBR-A

    • Increased RT Armor to 16 (from 8) in RT

    • Increased LT Armor to 16 (from 8) in LT

  • HBR-B

    • Increased RT Armor to 16 (from 8) in RT

    • Increased LT Armor to 13 (from 5) in LT

  • HBR-F

    • Increased RT Armor to 16 (from 8) in RT

    • Added 8 Armor to LT in LT

  • HBR-P

    • Increased LT Armor to 16 (from 8) in LT

    • Added 8 Armor to RT in RT

  • HBR-VI

    • Added 8 Armor to RT in RT

    • Added 8 Armor to LT in LT

  • HBR-AH

    • Increased RT Armor to 23 (from 15) in RT

    • Increased LT Armor to 23 (from 15) in LT

    • Added Missile HSL +1 in CT

    • Added -30% Missile Spread in So8

Linebacker

  • All Variants

    • Added 7.5% Speed Tweak in So8

Archer

  • ARC-2R

    • Removed 10% Energy Range

    • Removed -15% Missile Cooldown

    • Removed 10% Missile Velocity

    • Added 10% Range

    • Added -15% Cooldown

    • Added 20% Velocity

  • ARC-5S

    • Removed 10% Energy Range

    • Removed -10% Pulse Laser Cooldown

    • Removed -10% Pulse Laser Heat

    • Increased MRM Velocity to 260% (from 15%)

    • Added 10% Range

    • Added -10% Cooldown

    • Added -10% Heat

  • ARC-5W

    • Removed -5% SRM Heat

    • Removed +1 SRM HSL

    • Removed 15% SRM Velocity

    • Increased Missile velocity to 15% (from 10%)

    • Added +2 Missile HSL

  • ARC-T

    • Added 10% Energy Range

    • Added 20% Pulse Laser Range

    • Added 30% Medium Laser Family Range

Warhammer

  • WHM-6R

    • Removed -5% Energy Heat

    • Removed -5% PPC Heat

    • Removed 20% PPC Velocity

    • Added -10% Heat

    • Added 20% Velocity

  • WHM-6D

    • Added -20% Laser Duration

  • WHM-7S

    • Removed -5% ERPPC Heat

    • Removed -5% Laser Duration

    • Removed -10% Streak SRM Cooldown

    • Increased Missile Cooldown to -20% (from -10%)

    • Added -10% Heat

  • WHM-4L

    • Added 260% MRM Velocity

  • WHM-BW

    • Removed 10% STD AC Velocity

    • Removed 10% Energy Range

    • Increased Machine Gun RoF to 100% (from 50%)

    • Added 10% Range

    • Added 10% Velocity

Timber Wolf

  • TBR-A

    • Added 5 LT Armor in LT

Marauder IIC

  • MAD-IIC-D

    • Removed 7 RT and LT Armor

Cyclops

  • CP-11-A

    • Added 25% Velocity

  • CP-10-Q

    • Added +1 Missile HSL

  • CP-10-Z

    • Added +1 Energy HSL

  • CP-11-A-DC

    • Added -25% Heat

  • CP-11-P

    • Added -50% Stealth Armor Cooldown

Nightstar

  • NSR-9J

    • Removed 10% PPC Velocity

    • Added 30% Velocity

  • NSR-9FC

    • Removed -20% Ballistic Cooldown

    • Removed 10% Ballistic Velocity

    • Removed -10% Laser Heat

    • Removed 10% LBX Spread

    • Increased Heat to -15% (from -5%)

    • Added -20% Cooldown

    • Added 10% Velocity

  • NSR-9S

    • Added -30% Jam Chance

  • NSR-9P

    • Removed 15% Ballistic Velocity

    • Removed -15% Energy Cooldown

    • Removed -15% Missile Cooldown

    • Added 15% Velocity

    • Added -15% Cooldown

  • NSR-WP

    • Removed -5% Missile Heat

    • Increased Missile Spread to -25% (from -5%)

    • Increased Heat to -15% (from -5%)

Bane

  • BANE-1

    • Reduced RT Armor to 5 (from 10)

    • Removed 7 LT Armor

Stone Rhino

  • SR-AK

    • Reduced RT and LT Armor to 7 (from 10)

 


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