What changed in Hearts of Iron IV in 2021

156 updates · 63 main milestones · Feb 3, 2021 to Nov 25, 2021

  1. 2 events
    Fix for Armor 3D units in Tank Designerbug fix

    Fixed Armor 3D units from previous addons showing in the Tank Designer. The expected models can now be selected for tank designs.

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    Game executable signing issue resolvedbug fix

    Game executable should be properly signed again.

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  2. 3 events
    Hearts of Iron IV: No Step Back Release Datedlc releaseMilestone

    Hearts of Iron IV: No Step Back will release on November 23rd, 2021.

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    Barbarossa Patch ReleasedchangesMilestone

    The Barbarossa patch has been released alongside the No Step Back DLC, featuring a new checksum.

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    No Step Back DLC Releaseddlc releaseMilestone

    The No Step Back DLC is now available for Hearts of Iron IV.

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  3. 1 event
    New Achievements for No Step Back DLCnew contentMilestone

    20 new achievements added for the No Step Back DLC, including unique challenges for various nations.

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  4. 4 events
    In-Game Profiler for Performance Measurementperformance

    An in-game profiler will be included to measure performance metrics such as render time and FPS.

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    DirectX 11 Support AddedsystemMilestone

    The game will now support DirectX 11, allowing users to select it in the launcher settings.

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    New Leader for French Communist Focus Treegameplay

    René Nicod replaces Maurice Thorez as a leader in the French Communist focus tree, offering new gameplay options.

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    Retirement of Old Linux and Mac Platformssystem

    Old Linux and Mac platforms will be retired, requiring Ubuntu 18.04 and macOS 10.11 as minimum OS versions.

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  5. 4 events
    New Focus and Achievement Iconsnew content

    Preview of new focus and achievement icons coming in the No Step Back expansion.

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    New Loading Screen Art for The Krojanty Battlenew content

    Introduction of a new loading screen art depicting the Polish cavalry attacking German soldiers.

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    No Step Back Feature Streamsseasonal event

    Announcement of feature streams showcasing new focus trees starting on October 27th.

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    New Portraits in No Step Backnew content

    Introduction of several new portraits for characters in the upcoming No Step Back expansion.

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  6. 5 events
    Dynamic Tank Designer Backend Changesmodding

    Updated tank designer to support dynamic chassis creation based on roles.

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    Railway Building Enhancementsmodding

    Added options for easier railway setup and scripting through the nudger tool.

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    New Character Definition and Recruitment ProcessmoddingMilestone

    Characters can now be defined with roles and recruited in the country history file.

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    Introduction of Unified Character SystemmoddingMilestone

    Overhauled character handling to reduce bugs and confusion with distinct character roles.

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    New Effects and Modifiers for Moddingmodding

    Introduced new modifiers and effects like building_cost_factor and add_equipment_to_stockpile.

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  7. 3 events
    Strategic Redeployment Using Railwaysgameplay

    Strategic redeployment will now utilize railways for more realistic army relocation, affecting pathfinding choices.

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    Scorched Earth Mechanicnew content

    Players can spend Command Power to disable railways during tactical retreats, damaging them and preventing repairs.

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    Preferred Tactics for Generalsgameplay

    Generals can now earn a favored combat tactic at level 5, affecting all units under their command, in addition to the national preferred tactic.

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  8. 5 events
    Combat Effects of Railway GunsgameplayMilestone

    Railway guns provide negative combat modifiers to enemies, similar to shore bombardment.

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    Introduction of Railway Gunsnew contentMilestone

    New railway guns can be researched and produced, appearing in the capital upon completion.

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    Capture and Damage Mechanics for Railway Gunsgameplay

    Railway guns can be captured and damaged through encirclement and damage to their railways.

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    Railway Gun Movement and Deploymentgameplay

    Railway guns can only move to provinces with railways and can be attached to armies for support.

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    Unique Railway Gun Models for Major Powersvisuals

    Distinct railway gun models for Germany, USA, France, and others have been added.

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  9. 5 events
    Researchable Train Variantsnew content

    Players can now research different variants of trains, including armored trains that are more resistant to air attacks.

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    Introduction of Trains to Logistics Systemnew contentMilestone

    Trains are now a core component of the logistics network, essential for supplying troops beyond local state supply.

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    Removal of Train Priority Settinggameplay

    The train priority setting for supply nodes has been removed due to simulation issues.

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    Logistics Strike Mission AddedgameplayMilestone

    New logistics strike mission for CAS and bombers to target enemy supply networks, destroying trains and damaging railways.

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    Changes to Hub to Province Supply Distributiongameplay

    Adjustments made to how supply is distributed from hubs to divisions, including the removal of penalties based on weather and terrain.

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  10. 7 events
    Change in Game DirectorchangesMilestone

    Peter takes over as game director from Dan, with plans for future development.

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    Weather 2.0 Implementationgameplay

    Introduced changes to how weather affects gameplay, including org loss from movement and supply consumption.

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    New Ground Conditions Effectsgameplay

    Ground conditions now affect org loss on moving divisions, especially in adverse conditions.

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    Graphical Encircled Unit Iconsvisuals

    Added animations for destroyed encircled divisions to provide feedback.

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    Equipment Management by Division Templatenew content

    New feature allowing management of specific equipment usage by division template.

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    Updated Weather Effectsvisuals

    Visual improvements to weather effects on the map for better clarity and reaction time.

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    Allied Construction Featuregameplay

    Introduced the ability to build certain buildings in the territory of faction members.

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  11. 5 events
    New Formable Nationsnew content

    Introduction of new formable nations for the releasable countries.

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    Support of the Orthodox Churchnew content

    New decisions to gain support from the Orthodox Church to undermine communist support.

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    Soviet Union Focus Tree Expansionnew contentMilestone

    Introduction of new branches for the Soviet Union focus tree, including non-Communist paths.

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    New Releasable Countriesnew content

    Addition of new releasable countries from the USSR, including SSRs and Okrugs.

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    Civil War Preparation Mechanicsnew content

    New mechanics for preparing for a civil war, including obtaining equipment and spreading influence.

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  12. 5 events
    Soviet Union Opposition Pathsnew contentMilestone

    Introduction of alternative communist branches focusing on Trotsky and Bukharin's opposition to Stalin.

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    Civil War Mechanics OverviewgameplayMilestone

    New mechanics for initiating and managing a civil war within the Soviet Union, similar to the Spanish Civil War.

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    Post-Civil War DecisionsgameplayMilestone

    New decisions available after defeating Stalin, including decentralization and leadership changes.

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    Infiltration Optionsgameplay

    Players can infiltrate military and NKVD to gain advantages in the civil war.

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    Assassination Mechanicgameplay

    Option to attempt to assassinate Stalin if the Right Opposition path is chosen.

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  13. 2 events
    Server Visibility Settings Addednetwork

    Added server visibility settings to Steam MP (Public, Private, Friends)

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    MS Version Updatesystem

    Updated MS to keep version parity.

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  14. 12 events
    Introduction of COMECON Focusnew content

    Completing the focus 'Found the COMECON' will unlock a decision system to aid allies.

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    Introduction of Stalin's Traitnew content

    Stalin has been given a trait to enhance gameplay.

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    Locking of Third Five Year Plan Focusesgameplay

    Focuses related to the Third Five Year Plan will be locked once the Soviet Union enters a war against a major country.

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    Changes to Generals Rosternew content

    Players will start with the first five Marshals of the Soviet Union, with Kulik demoted to General and a new cavalry-specialized general introduced.

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    Airforce Branch Introductionnew content

    New focuses related to the Soviet Airforce have been added, reflecting historical challenges.

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    Unlocking of Fourth Five Year Plannew content

    Completing Restoration and Development after a peace conference will unlock access to the Fourth Five Year Plan.

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    Reduced Initial War Support for Soviet Unionbalance change

    Initial War Support has been significantly reduced to make it harder to achieve War Economy early on.

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    Reworked Soviet Focus Treenew contentMilestone

    A new Soviet focus tree has been introduced, offering a more flavorful and historically-accurate experience.

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    Introduction of Five Year Plansnew contentMilestone

    The Soviet industrial branch features the Second and Third Five Year Plans, impacting gameplay and national spirits.

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    New Research Slot from USSR Academy of Sciencesnew content

    The first focus grants a research slot and a bonus to research speed.

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    New Advisor Roster for Stalinnew content

    The advisor roster has been greatly expanded, including Genrikh Yagoda as a starting advisor.

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    Expanded National Spirits for Soviet Unionnew content

    The number of starting National Spirits has increased, including 'Home of the Revolution' and 'Trotskyite Plot'.

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  15. 5 events
    Supply Capital Relocationgameplay

    Players can move their supply capital to a new location to avoid being cut off, with a temporary supply penalty.

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    Control of Allied Access to Supply Nodesgameplay

    New options to control allied access to supply nodes to manage front lines more effectively.

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    Motorization Level Adjustmentgameplay

    Players can now set motorization levels for hubs and armies to enhance supply range.

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    Supply System UpdategameplayMilestone

    Major overhaul of the supply system allowing divisions to supply from multiple hubs and improved supply flow visualization.

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    Introduction of Floating Harborsnew contentMilestone

    New floating harbors can be constructed for naval invasions, providing temporary supply hubs.

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  16. 4 events
    Preferred Tactics Featurenew contentMilestone

    New feature to influence the likelihood of specific tactics being used in combat, enhancing strategic options.

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    Academy Spirits for Tailored Commandersnew contentMilestone

    New academy spirits allow players to generate commanders with specific personality traits and help them progress in desired directions.

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    Combat Effect Level Spiritsnew contentMilestone

    New spirits that improve specific parts of units to match strategies and allow historical moves like using capital ships as surface raiders.

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    Introduction of Officer Corps Spiritsnew contentMilestone

    New feature allowing players to specialise their military branches with Officer Corps Spirits that provide various bonuses.

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  17. 5 events
    Experience Generation Changesbalance changeMilestone

    All military advisors will now generate experience appropriate to their branch, with adjustments to experience from combat.

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    Advisor Promotion SystemgameplayMilestone

    Generals and Field Marshals can now be assigned advisory roles in addition to their command duties.

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    Introduction of Officer Corpsnew contentMilestone

    A collection of new features including a unique national interface for military branches.

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    Branch Experience Usagegameplay

    Doctrines will now be unlocked by spending branch experience instead of being accessed through the technology window.

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    New Advisor Interfaceui ux

    Advisor portraits for High Command and Military Theorists have been relocated to a new interface.

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  18. 5 events
    Colorized Infrastructure Bonusesquality of life

    Infrastructure bonus indicators are now colorized for easier identification of the best states.

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    Decommissioned Templates Featurequality of life

    Players can now mark templates as old, preventing them from showing in the list while still allowing divisions to use them with a warning.

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    Army List Controls Enhancementquality of life

    Added various controls to the army list for easier sorting and selection.

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    Lend Lease Interface Improvementquality of life

    A new button added to the lend lease interface allows players to send their entire stockpile more easily.

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    War Join Spam Reductionquality of lifeMilestone

    Reduced the number of pop-up messages when multiple nations join a war, improving the gameplay experience.

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  19. 4 events
    Eastern Front Planes Pack Releaseddlc releaseMilestone

    Over 50 new airplane models for nations fighting in central and eastern Europe.

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    Immersion Bundle Releaseddlc releaseMilestone

    Includes various cosmetic touches for visual and audio detail.

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    Mobilization Bundle Updateddlc release

    Updated to include all available Hearts of Iron IV expansions.

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    Eastern Front Music Pack Releaseddlc releaseMilestone

    13 new music tracks including the Soviet National Anthem and Lili Marlene.

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  20. 9 events
    Eastern Front Music Packnew content

    A new radio pack themed around the countries fighting on the eastern front with 13 tracks including The Soviet National Anthem.

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    José Díaz Portrait Fixbug fix

    José Díaz portrait should now work in all combinations of DLCs, alternate universes, etc.

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    Naval Battle Reports Fixbug fix

    Fixed incorrect naval battle reports with convoys on one side.

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    Portuguese Unit Voice-over Addedaudio

    Added Portuguese unit voice-over for La Résistance owners.

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    Ethiopia Peace Out Mechanicbug fix

    Ethiopia can now peace out Italy if they push them out.

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    Control Garrison Template Equipmentgameplay

    Players can now control the equipment of garrison templates like with other templates.

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    New CAS Attack Animationvisuals

    Added a new animation to CAS attacks to enhance visual appeal on the battlefield.

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    Eastern Front Planes Packnew content

    Various planes of different types for Germany, Soviet, Poland, Hungary, Romania and Yugoslavia. 54 planes in total.

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    Tom Moore Military Leader Addednew content

    Added Tom Moore as a military leader for Britain, complete with a jungle trait.

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  21. 7 events
    AI Stability ImprovementsaiMilestone

    The expansion aims to improve AI stability, particularly for the Soviet Union.

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    Announcement of No Step Back Expansiondlc releaseMilestone

    The next big expansion named 'No Step Back' was announced, focusing on the Soviet Union and the eastern front.

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    Onboarding Improvements for New Playersquality of life

    Plans to improve onboarding and tutorials for new players to enhance their experience.

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    Updated Visuals for Supply Systemvisuals

    Teaser visuals for the updated supply system were shown, indicating improvements in gameplay.

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    Introduction of Railway Gunsnew content

    New unit type 'Railway Guns' will be added, functioning like naval bombardment support.

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    Focus on Land Warfare and LogisticsgameplayMilestone

    The expansion will refresh land warfare and logistics systems, including a new partisan system.

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    Future Focus on Smaller DLCs and Free Updatesquality of life

    The development team plans to focus on smaller DLCs and free updates for better game flavor.

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  22. 5 events
    Latvia's Political Focus Treenew contentMilestone

    Introduced military and civilian government branches with unique decisions and focuses.

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    Estonia's Political Focus Treenew contentMilestone

    Introduced two starting focuses: Rally the Nation and Era of Silence, with unique gameplay mechanics.

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    Baltic States' Unique Gameplay Mechanicsnew content

    New mechanics for forming alliances, economic unions, and historical occupation choices.

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    Lithuania's Political Focus Treenew contentMilestone

    Introduced various political focuses including options for appointing a Prime Minister and pursuing external politics.

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    Shared Focuses for Baltic Statesnew content

    All three Baltic states can form the Baltic Entente faction and have access to an exiled government branch.

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  23. 8 events
    Polish Focus Tree Compacting Mechanismquality of life

    Implemented a system to automatically compact the Polish focus tree for easier navigation.

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    Communism Establishment OptionsgameplayMilestone

    Players can establish communism through war or Soviet intervention, leading to the formation of the United Baltic SSR.

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    Polish Focus Tree Changesgameplay

    Changes made to the Polish focus tree, including the removal of an off-map reactor.

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    New Focus Trees for Baltic Statesnew contentMilestone

    Introduction of new focus trees for Latvia, Lithuania, and Estonia in the upcoming expansion.

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    Economic Decisions for Baltic Statesgameplay

    Players can choose to rely on democratic nations or Axis powers for economic support.

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    Rearmament and Research Developmentgameplay

    Baltic states can attract workers and develop their research sector to modernize their industry.

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    Karl Albrecht von Habsburg for Monarchist Polandnew contentMilestone

    Introduction of Karl Albrecht as an option for monarchist Poland with unique traits and branches.

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    Shared Industrial and Communist Branchesgameplay

    Baltic states will share branches in their focus trees, including industrial and communist political branches.

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  24. 1 event
    Hearts of Iron IV Event Dateseasonal event

    Hearts of Iron IV will participate in the Grand Campaign on 7th May from 12:00 to 22:00 CEST.

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  25. 6 events
    Introduction of Tank Designer Systemnew contentMilestone

    A new system for designing tanks, allowing players to specialize designs based on mobility, firepower, and protection.

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    New Engine Types and Their EffectsgameplayMilestone

    Introduction of various engine types, including gasoline, diesel, electric hybrid, and gas turbines, each with unique benefits.

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    Addition of 1000 New 2D Icons for Tank Designsvisuals

    New visual icons for tank designs to make them more distinct in the production view.

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    Changes to Reliability and Armor SystemsgameplayMilestone

    Reliability will affect both breakdown likelihood and repair effort, while the armor system will become less binary.

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    Auto-Design and Auto-Upgrade Featuresquality of life

    New automation features for tank design, allowing players to auto-design and auto-upgrade tanks based on research.

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    Special Modules for Tank DesignsgameplayMilestone

    Addition of special modules like radios, smoke launchers, and amphibious drives to enhance tank functionality.

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  26. 7 events
    Offmap Nuclear Reactornew content

    Poland can now gain an offmap nuclear reactor that produces one nuke per year.

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    New Political Paths for Polandnew contentMilestone

    Poland gains new political paths including monarchist, socialist, and fascist options.

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    Regency Council Focusnew contentMilestone

    Poland can now assemble a Regency Council and choose from three claimants to the throne.

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    Peasants' Strike Focusnew contentMilestone

    Players can now initiate the Peasants' Strike to restore democracy or embrace communism in Poland.

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    Governments in Exile Featurenew contentMilestone

    Poland can now manage a government in exile, gaining unique leaders and bonuses.

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    Warsaw Uprising Operationnew contentMilestone

    Completing the Warsaw Uprising operation triggers the uprising sooner than usual.

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    Mastermind Codebreaker Advisornew content

    Poland gains access to the Mastermind Codebreaker advisor, Marian Rejewski.

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  27. 11 events
    Peasant's Strike Mechanicgameplay

    Failure to enact agricultural reform may lead to a peasant's strike, impacting stability and industry.

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    Danzig's Demilitarizationgameplay

    Danzig is represented as a demilitarized zone, affecting Poland's access to resources and manpower.

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    Align With the West Focusgameplay

    New focus allows Poland to join the Allies, maintaining historical accuracy.

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    Intermarium Ambitiongameplay

    New ambition allows Poland to create a major alliance if they are a faction leader and have a large army.

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    Baltic Alliance Path for Sanation Leftgameplay

    Expanded focus path for the Sanation Left to gain alliances with Baltic states and Czechoslovakia.

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    Poland Focus Tree Rework - Part 1new contentMilestone

    Introduction of a reworked focus tree for Poland as part of the upcoming Barbarossa patch.

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    Historical Political Focus Branchgameplay

    A new political focus branch allows players to navigate factionalism within Poland's dictatorship.

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    Expanded Industrial Branchgameplay

    The industrial branch now includes more focuses that grant extra factories and bonuses, improving factory acquisition.

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    Plan West and Plan East Focusesgameplay

    Players can start military preparations earlier, but must complete one plan before starting the other.

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    Polish Revanchism Branchgameplay

    Expanded focus branch for the Sanation Right, allowing for the annexation of Lithuania and restoration of the Commonwealth.

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    Embargoed Economy Trade Lawgameplay

    Poland starts with the 'Embargoed Economy' trade law, limiting trade until certain conditions are met.

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  28. 1 event
    Road to PDXCON: Grand Campaignseasonal event

    Join the teams of Crusader Kings III, Europa Universalis IV, Hearts of Iron IV and Stellaris for the largest event this side of PDXCON Remixed.

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  29. 6 events
    Introduction of New Supply SystemgameplayMilestone

    A new supply system focusing on railways and trucks to enhance logistics and player interaction.

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    Rivers as Supply RoutesgameplayMilestone

    Rivers will function like basic railroads for supply transport, needing control of both banks.

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    Supply Hubs MechanicgameplayMilestone

    Supply is now drawn from Supply Hubs, which include cities and naval bases, linked to the network.

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    Weather and Terrain Effectsbalance changeMilestone

    Weather and terrain will now significantly impact supply flow and logistics.

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    Logistics Impact on Combatbalance changeMilestone

    Logistics will play a more critical role in planning campaigns, affecting combat strategies.

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    Capturable RailwaysgameplayMilestone

    Railways can now be captured to supply troops, requiring control of railway hubs.

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  30. 5 events
    Brethren Court SystemgameplayMilestone

    A new system where admirals serve as military leaders in the pirate state, affecting naval composition and loyalty.

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    Economy 2.0 for MaltagameplayMilestone

    Malta now starts as a proper colony of the UK, requiring sandstone for construction and establishing shipping lanes.

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    Vertical Building MechanicsgameplayMilestone

    Players can now build vertically in Malta, with multiple levels and unique focuses for each level.

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    Introduction of Pirate State Mechanicsnew contentMilestone

    Players can transform Malta into a pirate state, gaining unique naval mechanics and gameplay options.

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    Malta Focus Tree Introductionnew contentMilestone

    A new focus tree specifically for Malta has been introduced, allowing players to explore unique gameplay mechanics.

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  31. 1 event
    Masters of the Mediterranean Multiplayer Eventseasonal event

    Join the Hearts of Iron team for a multiplayer clash over who can call themselves truly 'the Masters of the Mediterranean' on 10th and 11th March.

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  32. 3 events
    Added checks to block clients with empty or blank usernames from joiningbug fix
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    Fixed security flaw in networking allowing bypass of lobby password protectionbug fixMilestone
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    Fixed security flaw allowing users to kick/ban players without host permissionbug fixMilestone
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