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Victory is at your fingertips! Your ability to lead your nation is your supreme weapon, the strategy game Hearts of Iron IV lets you take command of any nation in World War II; the most engaging conflict in world history.


From the heart of the battlefield to the command center, you will guide your nation to glory and wage war, negotiate or invade. You hold the power to tip the very balance of WWII.


It is time to show your ability as the greatest military leader in the world. Will you relive or change history? Will you change the fate of the world by achieving victory at all costs?


Main Features:
  • Total strategic war: War is not only won on land, sea and in the air. It’s also achieved in the hearts and minds of men and women.
  • Authentic real-time war simulation: Let the greatest commanders of WW2 fight your war with the tools of the time; tanks, planes, ships, guns and newly discovered weapons of mass destruction.
  • Assume control of any nation: Choose from the greatest powers striving for victory, or the small nations trying to weather the storm.
  • Turn the world into your battlefield: Experience the full WWII timespan in a topographical map complete with seasons, weather and terrain. Snow, mud, storms can be both your strong ally and a ruthless enemy.
  • Negotiate or force your will: Experience the advanced politics and diplomacy systems, form factions, engage in trade for resources and appoint ministers to your party.
  • Intense Online Combat: Battle in both competitive and cooperative multiplayer for up to 32 players. Featuring cross-platform multiplayer.
  • Give your nation a unique edge: Experience the flexible technology system, where all major powers get their own unique identity. Develop detailed historic tanks and planes through research and army experience.


Everyone will receive:
  • Poland: United and Ready:

    A Free DLC adds a unique focus tree for Poland, new 3d models for tanks and planes, 2d assets, and extra leader portraits for the ultimate in historical accuracy.
  • Forum Avatar
  • Wallpaper
Hearts of Iron IV
Paradox Development StudiosDeveloper
Paradox InteractivePublisher
2016-06-06Release
🎹🖱️ Keyboard + Mouse
Very Positive (117406 reviews)
VR Support
Public Linux Depots:
  • Hearts of Iron IV Linux [135.44 M]
Available DLCs:
  • Hearts of Iron IV: Sabaton Soundtrack
  • Hearts of Iron IV: Together for Victory
  • Hearts of Iron IV: Death or Dishonor
  • Hearts of Iron IV: Sabaton Soundtrack Vol. 2
  • Hearts of Iron IV: Waking the Tiger
  • Hearts of Iron IV: Man the Guns
  • Cosmetic Pack - Hearts of Iron IV: Axis Armor
  • Music - Hearts of Iron IV: Radio Pack
  • Hearts of Iron IV: La Résistance
  • Cosmetic Pack - Hearts of Iron IV: Allied Armor
  • Music - Hearts of Iron IV: Allied Speeches Pack
  • Country Pack - Hearts of Iron IV: Battle for the Bosporus
  • Cosmetic Pack - Hearts of Iron IV: Eastern Front Planes
  • Music - Hearts of Iron IV: Songs of the Eastern Front
  • Hearts of Iron IV: No Step Back
  • Hearts of Iron IV - DLC Subscription
  • Hearts of Iron IV: By Blood Alone
  • Hearts of Iron IV: Arms Against Tyranny
  • Country Pack - Hearts of Iron IV: Trial of Allegiance
  • Hearts of Iron IV: Content Creator Pack - Soviet Union 2D
  • Expansion - Hearts of Iron IV: Götterdämmerung
  • Country Pack - Hearts of Iron IV: Graveyard of Empires
  • Cosmetic Pack - Hearts of Iron IV: Prototype Vehicles
  • Hearts of Iron IV: Expansion Pass 1
  • Expansion pass 1 Bonus - Hearts of Iron IV: Supporter Pack
  • Expansion Pass 1 Bonus - Hearts of Iron IV: Ride of the Valkyries Music
  • Hearts of Iron IV: Bonus Songs Pack
  • Hearts of Iron IV: Expansion Pass 2
  • Hearts of Iron IV: Seaplane Tenders
  • Expansion - Hearts of Iron IV: No Compromise, No Surrender
NCNS | Patch 1.17.3

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.\n\n[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/9948323/fcb7c5d4fde8db239b0222b395679d403678914f.png\"][/img]\nNo real big surprises here, as most of these are pre-set from the start.

\n

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.

\n[img src=\"https://cdn.cloudflare.steamstatic.com/steamcommunity/public/images/clans/9948323/edd16243fb6e21ce4b5d08ecacc22d5ec608a41e.png\"][/img]Youll hear back from us in the new year, may your encirclements be the bestest!

/Gorion

\n

Generals!

\n

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. \n\nMake sure you familiarize yourself with these Balance, Gameplay, AI, and Modding changes, as well as the Bug Fixes.\n\nBalance

  • 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 for Qinghai Ma and the Sichuan Clique now properly preserve the country leader traits and roles for other ideology variants

    [/*]
  • Reworked \"Establish a Marine Corps\" Goal to now require any type of Amphibious battalions, and to require them to be >90% equipped.

    [/*]
  • Adjusted \"Expand Our Armored Forces\" short-term Goal to now require the armored battalions to be >90% equipped.

    [/*]
  • Added a requirement to control 50% of Austronesian claimed states before being able to take the Philippine \"Masters of the Pacific\" focus.

    [/*]
  • Made Sun Li Jen available from game start

    [/*]
  • Added a decision to invest in your officer training to increase your recruit able population faster

    [/*]
  • Added \"Establish an Airborne Corps\" and \"Establish a Mountaineer Corps\" medium-term Goals.

    [/*]
  • Added the \"Production Quotas\" short-term Goal.

    [/*]
  • Added the \"Convoy Sufficiency\" short-term Goal.

    [/*]
  • Updated and cleaned up the East Asian Country trigger for faction rules

    [/*]

AI

  • Fixed an issue where AI controlled taskforces would sometimes abort a movement to go back to base, when there was no reason to

    [/*]
  • Naval AI will no longer try to protect its coast if the enemy has no navy. This includes when not at war, so no more wasting fuel on that.

    [/*]
  • Made Naval AI pre-emptively protect the coast of home area if there are incoming war goals or world tension is above 50%

    [/*]
  • Fixed issue where very few countries would build dominance where required for naval blockade to work

    [/*]
  • Fixed issue where AI would create new fleets every day, changing colors and names of the fleets very often

    [/*]
  • Improved AI taskforce selection and re-enabled convoy escort mission for AI

    [/*]
  • The Japanese Ai will now wait a little bit before popping out Vietnam, Laos and Cambodia as subjects in Indochina

    [/*]
  • AI no longer builds energy & resource infrastructure too early

    [/*]

Modding

  • Added support for setting the equipment ratio\'s for land units / unit categories in the count_in_collection effect

    [/*]
  • added support for the count in collection to use sub unit categories and sub unit definitions

    [/*]
  • count_in_collections can now look for equipment in stockpile

    [/*]

Bugfix

  • Fix an exploit where switching a division to a new template with disabled or missing equipment could still allow mastery gain from that template

    [/*]
  • Naval gun hit chance bonuses from MIOs are now applied correctly

    [/*]
  • Added new icons for the Submarine Nuclear Strike Raids and clarified that it is a submarine raid by renaming the raids

    [/*]
  • Fixed missing class definitions on 1939 Japanese starting ships, leading to empty ships with no modules.

    [/*]
  • Fixed wrong special project prefix-checks in ITA - King of the Skies, Modern Musculus, Caligulas Pride.

    [/*]
  • Made the population of the Tohoku region more historically accurate, lowering the total Japanese core population by about 3 million

    [/*]
  • Fixed a bug where the anti_air_4 module was not the parent of anti_air_3

    [/*]
  • Fixed Graf Zeppelin being called the \"Graf Zeppelin Class Klasse\".

    [/*]
  • Invalid faction theaters are now automatically removed from the faction

    [/*]
  • Resolved an OOS happening of the client had played single player before joining the MP game

    [/*]
  • Fixed an issue where peaceful reunification could be sought even if not in a faction with the other side, an issue where Chen Mingshu would not properly become the democratic leader, and incorrect triggers for the focuses Subjugate Korea and Dare to Win

    [/*]
  • Crash when trying to use recon planes when you do not have La Resistance

    [/*]
  • Fixed an issue where the PRC decision to oust the Yulin Garrison would stay after removing the state modifier

    [/*]
  • cannot replace defeat communism goal after completion

    [/*]
  • Fixed an issue where democratic Japan could core non-asian states if annexing a subject with cores outside of Asia but with a capital in it

    [/*]
  • To end the Peru-Ecuador war through decisions, both participants now need to be independent, and the war has to have started through the decision

    [/*]
  • Changed stability penalty effects for the \"Guarantee Tension Reduction 15/40%\" and \"Justify Wargoal Reduction 20/40%\" Faction Rules to now be modifiers instead.

    [/*]
  • Adjusted \"Justify Wargoal Reduction 20/40%\" Faction Rule names to the more accurate \"Justify Wargoal Tension Reduction 20/40%\".

    [/*]
  • Fixed incorrect names in chinese localization

    [/*]
  • Faction rule enable effects running multiple times

    [/*]
  • fixed broken localization strings if the UK rejects the Raj offer from \"Colonial Cadet Exchange\" focus.

    [/*]
  • The PRC Carrier MIO now gives a refitting bonus instead of a non-usable equipment conversion one

    [/*]
  • Fixed an issue where the achievements Pand-monium and Make a Man out of You weren\'t available if playing as any of the newly added warlords

    [/*]
  • Fixed an issue where Japan could prospect for oil in North Sakhalin indefinitely

    [/*]
  • Fixed an issue where Interior Borneo had building slots available despite being impassable

    [/*]
  • Turan now gains a core on Tomsk when formed

    [/*]
  • Fixed broken loc string in autonomy system for when allocating lend lease

    [/*]
  • Organise the 200th division now have functional tanks when owning No Step Back

    [/*]
  • Fixed a bug where Battle Royale would not trigger correctly if you declared war on both China and Japan on the same tick

    [/*]
  • De-desertified the Philippines, and replaced them with lush jungle. 1x southern Central Islands, 1x northern Eastern Visayas.

    [/*]
  • Replaced 2x desert in the Moluccas with Jungle.

    [/*]
  • Sets a readable HP bonus to the individual excellence subdoctrine.

    [/*]
  • Fixed an issue that caused Ethiopia to only be able to become exiled in the UK if NCNS was enabled

    [/*]
  • Fixed an issue where Chinese guerillas could be rooted out by anyone, and not only the controller or overlord of the controller of a state

    [/*]
  • Fixed an issue where the State Shintoism stability improvement wouldn\'t be properly applied if done by Manchukuo or the Reorganised Government

    [/*]
  • added missing Hispanic countries to the Phillipines \"Hispanic Overtures\" focus.

    [/*]
  • Fixed AFG\'s \"Reintroduce War Elephants\" focus granting the Proper Heritage spirit, then immeidately replacing it as invalid due to doctrine requirements for the spirit added with NCNS.

    [/*]
  • Declare Military Emergency no longer breaks the Philippines.

    [/*]
  • Updated tooltip to correctly show the clamped spotting speed

    [/*]
  • Fixed a bug where in DX9 the sun\'s reflection was broken

    [/*]
  • Fixed a rare CTD related to faction theaters

    [/*]
  • Fixed a bug when a co-op player rejoins the server after being kicked, there would be several main controllers

    [/*]

\n\n

Remember to submit your bug reports. [u]You can read our Guidelines on how to write a Bug Report here[/u] !

[ 2025-12-10 13:03:03 CET ] [Original Post]

Minimum Setup

  • OS: OS: Ubuntu 20.04
  • Processor: Intel Core 2 Quad Q9400 @ 2.66 GHz / AMD Athlon II X4 650 @ 3.20 GHzMemory: 4 GB RAM
  • Memory: 4 GB RAM
  • Graphics: ATI Radeon HD 5850 or NVIDIA GeForce GTX470 with 1GB VRAM / Latest available proprietary drivers from both manufacturers
  • Storage: 2 GB available spaceAdditional Notes: Controller support: 3-button mouse. keyboard. and speakers are required. / Internet Connection or LAN for multiplayer. Up to 32 other players in multiplayer mode.
  • Memory: 4 GB RAM
  • Recommended Setup

    • OS: OS: Ubuntu 20.04
    • Processor: Intel Core i5 750 @ 2.66 GHz / AMD Phenom II X4 955 @ 3.20 GHzMemory: 4 GB RAM
    • Graphics: ATI Radeon HD 6950 or NVIDIA GeForce GTX570 with 2GB VRAM / Latest available proprietary drivers from both manufacturers
    • Storage: 2 GB available spaceAdditional Notes: Controller support: 3-button mouse. keyboard. and speakers are required. / Internet Connection or LAN for multiplayer. Up to 32 other players in multiplayer mode.
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