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Steam News10 December 20256mo ago

NCNS | Patch 1.17.3

As this year quickly closes, this is the last patch of this year, and it has been a year!

Full notes

Full Hearts of Iron IV update

Read the full published notes in a cleaner layout. The original post stays linked below.

What changed

0 fixes3 additions8 changes1 removal
  • Gameplay
  • Balance
changedAs this year quickly closes, this is the last patch of this year, and it has been a year! We will continue to work on patches in the new year, and part of the team will start on the next big thing, while another part of the team continues to work hard on Thunder at our Gates. I want to highlight the post that Arheo wrote earlier this year , where he discussed various high level topics if you want to have a sneak peek of stuff that we might be working on more.
addedYou’ll hear back from us in the new year, may your encirclements be the bestest!
changedOur amphibious assault is underway, and the initial beachhead is secure. Allied Headquarters will be establishing our supply line to support the coming battles with Patch 1.17.3. ⚔️ Make sure you familiarize yourself with these Balance, Gameplay, AI, and Modding changes, as well as the Bug Fixes. Balance
changedIncreased the number of battalions required by a faction to complete the "Establish a Marine Corps" and "Expand Our Armored Forces" Goals.
changedupdated the width reduction effect on artillery from the Fire Concentration subdoctrine to also affect line rocket artillery.
changedA Shield Towards the Sky now gives 2 research bonuses a la 50% for Anti-Air and state AA now gets applied to subjects as well
Nerfed CAS damage to strength0.080.05Nerfed CAS damage to strength decreased, nerf

As this year quickly closes, this is the last patch of this year, and it has been a year! We will continue to work on patches in the new year, and part of the team will start on the next big thing, while another part of the team continues to work hard on Thunder at our Gates. I want to highlight the post that Arheo wrote earlier this year, where he discussed various high level topics if you want to have a sneak peek of stuff that we might be working on more.

As last I leave with you a breakdown of our telemetry on Doctrine usage. (Note, these are stats by real players only, not AI!)

Grand Doctrines

A breakdown of various countries and which Grand Doctrine they end up choosing. No real big surprises here, as most of these are pre-set from the start.

Sub Doctrines

If we look at the Sub Doctrines for the army specifically, we can see that there is very little favoritism among the sub doctrines, except for Fire Concentration. Overall this means that the doctrines are where we wanted them to be; depending on play style certain doctrines are better suited, and more choice is offered.

You’ll hear back from us in the new year, may your encirclements be the bestest!

/Gorion

Generals!

Our amphibious assault is underway, and the initial beachhead is secure. Allied Headquarters will be establishing our supply line to support the coming battles with Patch 1.17.3. ⚔️ Make sure you familiarize yourself with these Balance, Gameplay, AI, and Modding changes, as well as the Bug Fixes. Balance

  • Nerfed "Tank Destroyer Force" subdoctrine slightly by lowering initiative & max organization

  • Nerfed "Grand Assault" subdoctrine slightly by reducing the maximum organization gained

  • Sets a more reasonable initiative buff on Tank destroyer force and People's militia subdoctrines to avoid overstacking

  • Changes to doctrine mastery gain modifiers in several focus trees

  • Increased the number of battalions required by a faction to complete the "Establish a Marine Corps" and "Expand Our Armored Forces" Goals.

  • updated the width reduction effect on artillery from the Fire Concentration subdoctrine to also affect line rocket artillery.

  • Lowered Sun Li Jen to a level 3

  • Draw Support from the Big Families is now a 35 day focus

  • Now when owning By Blood Alone China starts with a couple more air techs.

  • Lower base war support for China from 50% to 32%

  • The 4 Defense Areas now give their state modifier for 210 days instead of 120 and now applies to subjects and faction members

  • A Shield Towards the Sky now gives 2 research bonuses a la 50% for Anti-Air and state AA now gets applied to subjects as well

  • A Wall into the Sea is now a 35 day focus

  • Made operation Ichi-go more expensive to start, and have slightly harsher penalties if not completed in time

  • Lowered winter attrition from 50% to 40%

  • Increased accident chance on low experience airwings

  • Added more coal to three pre-ncns focuses related to coal mining, and added a small amount of starting coal in the southern Congo

  • The Nationalist Chinese and post-warlord focus "60-Divisions Plan" now displays the effect of the decision it unlocks, and takes 35 days

  • Nerfed CAS damage to strength from 0.08 to 0.05

  • Gave Soviet Union a negative to mastery gain that can be removed by replacing "Politicized Military"

Gameplay

  • Added Ranger divisional namelists for a number of countries

  • Yang Sen and Jamphel Yeshe Gyaltsen now start with country leader traits, and country leader swap

Source

Steam News / 10 December 2025

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