- Simulation
- Strategy
Game
Hearts of Iron IV
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?
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.
About Hearts of Iron IV
- Released
- June 2016
- Developer
- Paradox Development Studio
- Publisher
- Paradox Interactive
- Engine
- Clausewitz Engine
- Platforms
- Linux · PC (Microsoft Windows) · Mac
Where to get it
Release, studio and platform data from IGDB. Store links go to the sellers, not to us. We do not sell games and we do not host files.
Browse everything
Sorted, filterable and paged. Every link goes to the author’s own download.
From the developers
Official announcements, newest first. Posted on Steam.
- Community AnnouncementsHearts of Iron IV | QoL Patch Notes 1.19.4Generals! Christmas is coming a little early this year in the shape of a large War Effort update. Once again we have put emphasis on adding various QoL features we feel improve the Hearts of Iron IV experience. This has been an effort to address some of the outstanding requests we have been seeing over time from our community and we hope you will enjoy them. While there are quite a few things w...
- Community AnnouncementsHOI IV Dev Diary | Romania: A Flawed DemocracyGenerals! Greetings, I’m Norrman and I’ve been working with Marijn and Alex on the upcoming Romania Focus Pack and I will cover the first part of this Dev Diary. Some quick notes about me before I move on to the content that has been my main focus. I’ve been playing Hearts of Iron IV since about a month after the game’s release and I’ve been modding the game for a bit over 4 years at this point...
- Community AnnouncementsDev Corner & Open Beta: Energy #2Hello again! After a lot of reactions last week, we’ve made some changes. We are still not sure if we should release this or not, but based on the reactions we also decided to make this an open beta. Changes since last dev corner: Power plants now fulfill a state slot instead of the shared factory slots You can build up to 3 levels of power plants in a single state Research has been added, allo...
- Community AnnouncementsHOI IV Dev Corner | Strikes!Hello there! Your feedback has been much appreciated, both with civil wars and old Canada content. So I come here once again to ask you what do you think about…. Strikes! (As in the labour history, workers striking for better rights) I’m particularly curious about what you feel about the generic strikes (low stability) vs country specific strikes (like Australia’s communist paths) What do you t...
- Community AnnouncementsSteam Autumn Sale 2026Generals!We've received communications from our Allied Headquarters, that indicates Hearts of Iron IV and its associated DLCs will be taking part with the Steam Autumn Sale!Take advantage of this recent development, and secure additional frontlines for the war effort.
- Community AnnouncementsHOI IV Dev Corner | EnergyGenerals! Something different, not planned for any expansion, but perhaps a future war effort. We added coal to the game as part of the free update released with No Compromise, No Surrender. However, coal did not end up where we really wanted it, and we ended up nerfing its effects to the point where it didn't really matter anymore. Part of the feedback we received was that using coal to repres...
- Mods indexed
- 2.8k
- Versions
- 0
- Newest tracked
- none yet
- Most disruptive update
- No breakage data for this game
of 65.5k on Steam Workshop
Most downloaded
Measured from the source's own counts, summed across every release.
- The Road to 56Road to 56 is a major addition to your Hearts of Iron experience that has been lovingly crafted by a team of dedicated fanatics. We've massively expanded the technology tree, extended the timeline to 1956, and developed some truly awesome alternate-history paths for nearly every country. Improved...2.6M downloads
- KaiserreichWelcome to the world of Kaiserreich! Current KR version: 1.6.4, released 11/06/2026 Current HOI4 version supported: Operation Postern v1.19.2.0.a729 (d245) "What if Germany had won World War 1?" As 1936 dawns, the Weltkrieg's legacy lies heavy upon the shoulders of a new generation. Germany stand...2.1M downloads
- Millennium Dawn: A Modern Day ModWith the dawn of a new millennium, a new chapter in human history is about to be written. Globalization continues to change the lives of countless billions while rising extremism is showing signs of igniting the fires of conflict. New powers begin to emerge, and not all believe their place in the...1.6M downloads
- Hearts of Iron IV: The Great WarBASICS INFORMATIONS Current Version: Open Beta 0.26 "Heatwave" Compatible with: Hearts of Iron IV 1.19.1 Supported Languages: - English - French (Integrated in the Mod, Version Améliorée) - German (Integrated in the Mod, mainly made by Proho16) - Russian (Integrated in the Mod, Спасибо Strategium...1.5M downloads
- Player-Led Peace ConferencesThis mod gives players full and direct control of peace conference proceedings in wars they are involved in. Wars without player involvement conclude as normal. Currently supports patch 1.19 and above. If you're playing on version 1.10 or 1.11, please use the legacy version of this mod instead: T...1.4M downloads
- The New Order: Last Days of EuropeThe year is 1962, and old powers and new struggle for control over the nations facing the Atlantic... The dictatorial compromise of the Iberian Union was forged out of fear and distrust, and fear and distrust rules it. Always regarded as second-rate powers, the Caudillos of Spain and Portugal see...1.2M downloads
- Old World BluesWar, war never changes. Old World Blues is a total overhaul for Hearts of Iron IV: starting in the year 2275 and set in the Fallout universe. Experience the postapocalypse like never before with a dynamic war system that ensures that the AI nations act on their own, respond to aggression, and str...994.6k downloads
- 52 Chinese Localisation钢铁雄心4 v1.14.3 简体中文汉化包 240401版 * 目前AAT之前的是用的本民间汉化文本（修正了官中的一些错误），AAT之后使用的是官中文本。 * 覆盖了官中的文本和字体，打了本MOD后无论“英文”和“中文”都是汉语且都是修正后版本。 * 目前没有打算做全面的官中润色，基本上就是把大家汇报的汉化错误修一修，定期发布一下。 ===============汉化包说明=============== 本汉化包由52pcgame汉化组和牧有汉化组合作完成，针对钢铁雄心4游戏本体及所有已发布的DLC。 汉化已经平台化，点击进入。以后错误报告和建议都在这里讨论。 原版汉化由从52论坛和各贴...978.6k downloads
- FPS MapThis mod will optimize your game and make the map more clear and colorful. Addons: *less shaders *non-reflective water *sharper borders *coloured icons *strategic view adjustments HOI4 version: 1.17+ Discord and support:962.4k downloads
- [OUTDATED] The Great War Redux - New page in description929.2k downloads
- Cold War Iron Curtain: A World DividedPatch 8/30/2026 Current Version 0.4 HOI4 Version 1.19 The Year is 1949, a shattered planet begins to fall back into the arms of tyranny and conflict, as new rivalries emerge. Welcome to a new era of struggle, determination and conflict, as nations struggle to achieve independence and power. Super...928.3k downloads
- KaiserreduXFor more information, join our subreddit and discord Our Official Music Mod is here KaiserreduX started out in late 2019 as a collection of various submods for Kaiserreich, later evolving into a unified submod turned fork and eventually - thanks to the continuous addition of new content, wider sw...917.2k downloads
- The Fire RisesCurrent Version: Release 1.0.9.1c "Brussels Effect" Hearts of Iron 4 Version: 1.19.* The year is 2020. The United States and Iran are locked in a Cold War-era standoff, while a mysterious novel virus has been spreading uncontrollably through central China. Russia, Saudi Arabia, and other nations...902.9k downloads
- The Fire Rises Music AddonMusic Addon for TFR Version 1.0 "Don't Open 'til Doomsday" Hundreds of musical pieces from all around the world! Fascinating, hand picked collection of all-time favorites from every genre! From songs enjoyed by your dad and grandma, to modem hits of current generation! Yes, this music mod is that...859.6k downloads
- Kaiserreich MusicWelcome to the Kaiserreich music mod! Over 1000 songs for countries all over the world! Region, ideology and nation specific songs for countries all over the globe. Tune into a multitude of radio stations and enjoy over 1000 era appropriate songs while you play. This mod is kept separate from the...776.8k downloads
- Coloured ButtonsColours the important buttons in the main UI and some others. Prevents miss clicks and vitalizes the somewhat plain UI. Compatibility ● Works with Ironman & multiplayer ● Should work with all other mods that dont change these specific buttons Download Solving problems with the mod or launcher746.7k downloads
- Kaiserreich Music KaisercatWelcome to the Kaiserreich Kaisercat music mod! All the original Kaisercat music in one place! All the original songs created by Kaisercat cinema have been bundled together in this wonderful music mod. For your listening pleasure, tune into the Kaisercat radio station and enjoy while you play. Th...604.2k downloads
- Kaiserreich Music InternationalesWelcome to the Kaiserreich Internationales music mod! Every version of the Internationale you could ever want! The glorious Internationale in every language we could find, combined into one mod. For your listening pleasure, tune into the Radio Révolutionnaire station and enjoy while you play. Thi...599.9k downloads
- BlackICE Historical Immersion ModOLD VERSION IF YOU WANT TO CONTINUE SAVES: - 10.0.12.1 - 10.0.12 -9.2.0 We aim to bring Hearts of Iron 4 to an all new level, making your game experience more immersive, historical and challenging. Black ICE completely overhauls most national focus trees, changes game mechanics, adds in tons of e...568.0k downloads
- Equestria at WarEquestria at War (EaW) is a mod that tries to recreate the fantasy world of Equestria from My Little Pony franchise in a slightly darker setting with industrialization, corruption and political disagreements. The scenario focuses on global confrontation between Changelings and Equestria. + Pleasa...555.0k downloads
- Endsieg:Ultimate VictoryAre you interested in a more accurate, more fun and europe-only Endsieg-like mod? Join the Primo Victoria Discord! This is the official successor to the Götterdämmerung 1944 Mod. Anyone else claiming to be or uploading a former/older version of this mod (Götterdämmerung 1944) is doing so without...549.5k downloads
- Novum VexillumThis mod spans the modern era from 2000 to 2032, built on the 2018 Millennium Dawn files. It serves as an enhanced version with modernized features while preserving the streamlined, vanilla-inspired feel of the original and most popular Modern Day mod. It also includes full DLC compatibility, inc...541.9k downloads
- The Great War ReduxThe Great War: Redux is a standalone rework of the famous Great War mod from Wolferos. Updated focus trees and gameplay for more diverse, playable, historical and interesting game. Compatible with the game version 1.19.*. This is an independent mod. You will not need the original TGW. Features: 1...537.7k downloads
- State Transfer ToolPLEASE READ THE DESCRIPTION! ATTENTION!!! With new compliance and resistance system cores added on owned states become visible after day tick (when the time changes from 23:59 to 0:00) Tired of using console to fix some borders? Maybe you just finished great ironman game and want to change some u...505.1k downloads
Browse all 2.8k Hearts of Iron IV mods Sortable by downloads, rating and date.
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Why Hearts of Iron IV mods break
A mod is compiled against one version of a game. When the game updates, anything that reached into the parts that moved stops working, and it usually stops working silently rather than with a message that explains itself.
That is what the table above counts. It is not a guess: each row is a mod the community has reported as broken by that specific release. The number is a fair measure of how disruptive an update was, and it is the reason people delay updating a game they have modded heavily.
Common questions
Does IndexGG host Hearts of Iron IV mods?
No, and it never will. Every download link points at the author's own page on Nexus, GitHub, CurseForge or wherever they published it. We index the ecosystem; the files stay with the people who made them.
Where does the compatibility data come from?
From the communities that maintain it in the open, not from guesswork. Each claim carries how it is known, so a reported breakage is never presented as though the author said it.
Why is a mod listed as broken when it works for me?
Compatibility depends on your exact game version and the rest of your load order. A mod marked as broken in one release may work fine on an older one, which is exactly why the version is recorded next to the claim rather than a bare yes or no.