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.
3recent developer posts shown belowSelected from the developer record, separately from press coverage. Announcements are not necessarily shipped patches.
Last successful news check: This is our collection date, not the date of the latest patch.
Newest in this record ·
Hearts of Iron IV Expansion Pass 3 Now Available!
From the recorded announcement
Generals! Today we have TWO grand news items. First, Expansion Pass 3 is now available! You’ll find it here. Second, our grand Livestream Event “Studio GOLD: Battleplans Revealed” is now live! You can join us right both on our new Twitch channel and on our trusty YouTube. Topics that we’re be discussing today: The…
Read more of this announcement
Generals! Today we have TWO grand news items. First, Expansion Pass 3 is now available! You’ll find it here. Second, our grand Livestream Event “Studio GOLD: Battleplans Revealed” is now live! You can join us right both on our new Twitch channel and on our trusty YouTube. Topics that we’re be discussing today: The recent 1.19.4 Quality of Live patch Expansion Pass 3 The Romania Focus Pack Our next Country Pack: USA, Canada and more Our next Theater Pack Then we’ll round things up with a live Q&A, so come on in, join us and ask your questions. Join us now Live over on Twitch Youtube
HOI IV Dev Diary | Romania: Military, Country Mechanic & More Alternate History
From the recorded announcement
Salut, Generals! I’m marijn211, and today I will be showing some of the Focus Tree parts I worked on, which comes down to the left side of it, both in in-game positioning and political ideology. First though, I want to show the country mechanic that was shown in our first Dev Corner in a bit more detail. Cooperation…
Read more of this announcement
Salut, Generals! I’m marijn211, and today I will be showing some of the Focus Tree parts I worked on, which comes down to the left side of it, both in in-game positioning and political ideology. First though, I want to show the country mechanic that was shown in our first Dev Corner in a bit more detail. Cooperation Mechanic Here you can see all the countries that are available in the mechanic, Romanian relations with Hungary and Bulgaria were not the best so interacting with them is blocked until you either do certain focuses or end up in a faction with them. Interacting with countries is done in two ways, the tier can be invested in with political power to grant predetermined bonuses - each country is like an industrial concern that is cheap but requires some initial political power investment and then a smaller amount to maintain its benefits. The tier also affects some decisions attached to the mechanic. Military Branch In the dev corner’s, I added a little sneak peak of the core of the military branch, let’s go through that, and the other parts, in a little more detail. Romania’s military production in 1936 was nearly non-existent, but it swiftly expanded before the Second World War, this was part of a larger Ten-Year Modernization Program, proposed in 1935 by military figures including Ion Antonescu. One of the spirits Romania starts with represents this issue, but the idea will upgrade as you do military focuses, until it grants exclusively positive modifiers. Starting from the left side of the tree, the naval branch shows the historical investments into Galati…
Generals! 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…
Read more of this announcement
Generals! 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 we’ve addressed, we want to do more of these updates that improve the overall user experience to feel more modern than the game actually is (TEN years is a long time…). A lot of you have indirectly contributed to this update by sharing your thoughts with us over time and having conversations with each other on what you would want to see to make the game better for all of you. There is always room for improvement and I look forward to your feedback as always, I am sure we will want to iterate more on our QOL features after extensive community usage. And last but not least with this update we will also roll out the last changes from the Open Beta ‘Summer Edition’ that we felt were good changes to the game, so you will be seeing a large amount of balance changes around doctrines and other avenues that concern the combat simulation. Additionally there’s the traditional slew of bug fixes that will be coming your way as we have done with past War Efforts as well. I for one am excited to finally release this very large update and hope it will bring you some early holiday joy when you get around to giving it a spin. Cheers! /Batya For a quick rundown of the QoL patch, check out our latest…
89.8% of 360,541 Steam reviews are positive, which after adjusting for sample size gives a reception score of 89.7. The developers have shipped 10 substantial updates in the past six months, adding 7.2.
reception 89.7·support +7.2·Exceptional
Computed from Steam’s own review tally and observable developer activity — never from anyone’s opinion of the game. How this is calculated
Should you look into this?
From Steam's own record
Current price
$49.99
Development
Actively supported
Last heard from developers
9 days ago
Historical posting rhythm
every ~3.5 days
Substantial updates (6 mo)
10
Current silence
3× normal
The developers post roughly every 3.5 days and were last heard 9 days ago — within their normal range. 10 substantial updates recorded in the past six months.
Last successful news check: Nov 8, 2026, 2:03 PM UTC. This is when we checked Steam, separate from when the developer last posted.
Before buying, confirm the edition, Steam activation and availability in your region. Search results may include DLC or other editions.
Distilled by the oracle
Our coverage
1 dispatch written from this game’s announcements
patchAug 16, 2026
Hearts of Iron IV Beta Update Refreshes Threading Libraries for Modern CPUs
Tech Lead Pdxen opens the patch notes with a frank observation: a lot has changed in PC hardware since Hearts of Iron IV launched. CPUs that once shipped with four cores and roughly eight hardware threads have given way to chips with more cores, more threads, and — critically — heterogeneous core architectures. The game's threading libraries had not kept pace.
What changed
Threading libraries updated to better accommodate modern hardware configurations, with the stated aim of improving performance on some machines
Multiplayer host hardening strengthened for operations such as kicking and banning players, addressing malicious interactions reported on the forums
Pdxen is candid about the scope of the change: updating threading at a fundamental level across a wide variety of player hardware carries real risk, which is precisely why it is being tested in open beta before a broader rollout.
On the design side, Game Designer Zwirbaum notes that balance changes and experimental features are paused for this update but are expected to resume in the near future — no timeline is given.
A follow-up beta update was already in preparation at the time of publishing, suggesting player feedback from this build turned around quickly.
For those who have noticed multiplayer sessions disrupted by bad actors, the host-side hardening is the more immediately tangible fix; the threading work will matter most to players on newer hardware who want to know whether the engine can better use what their machine offers.
Two years of development
■ substantial ■ routine
58 announcements · 13 substantial · 16 months with nothing
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Salut, Generals! I’m marijn211, and today I will be showing some of the Focus Tree parts I worked on, which comes down to the left side of it, both in in-game positioning and political ideology. First though, I want to show the country mech…
Generals! 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 ad…
The Hearts of Iron 4 Romania focus pack DLC lets you pursue realistic or alternate-history paths for the nation through World War II. Read the full story on PCGamesN: The next Hearts of Iron 4 DLC gives an underrepresented WW2 player much m…
Generals! 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 mai…
Hello 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 pla…
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 pa…
Generals!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 fr…
Generals! 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 want…
Generals!Another week, another Dev Corner. Read through and give us your relevant feedback.Hello all! I'm the content designer working on Canada (obviously the most important nation in the DLC), and I'm well underway but I'd figure I'd swin…
Hearts of Iron 4 developers Paradox Interactive have prohibited the use of Discord profile pictures of historical figures born after 1st January 1800, save for official in-game portraits, amid an uproar caused by a moderator banning somebod…
Hearts of Iron IV столкнулась с волной негативных отзывов после конфликта вокруг модерации официального Discord-сервера игры и фотографии Мустафы Кемаля Ататюрка — основателя Турецкой Республики. На момент публикации лишь 8% из более чем 20…
Hey, folks! This is your friendly neighborhood ImaginedPanda, content designer on Heart of Iron, coming to you with today's Dev Corner. For our current iteration we will be talking about economic woes or how I stopped worrying and started t…
Generals! With the weather becoming more gloomy and the summer on its way out, we bring the last “Summer” release. This will be the last patch that specifically targets Thunder at our Gates and brings a few additional pieces of content for …
Hi all, and welcome to the next installment of our 2026 Dev Corners. Your feedback on ideas in early development, including my prior ones on army quality and airborne troops, is very helpful to us. I hope I can benefit from your input once …
Generals! Welcome to an additional Dev Corner on Military Production. Hello, I am Zwirbaum, Game Designer for Hearts of Iron, and welcome to this Dev Corner about Industry. This is a follow-up to the Military Production Dev Corner since you…
Paradox is going to "take extra time" for the next Hearts of Iron 4 expansion, but a Romania DLC is coming soon for the WW2 strategy game. Read the full story on PCGamesN: The next Hearts of Iron 4 expansion is delayed, as Paradox tries to …
Hello Generals, Admirals and Air Chief Marshals! Swedish summer is over, and we were blessed as it lasted a good 5 weeks. We’d already started work on the 1.19.3 patch before, and we’ve been at work putting the finishing touches for the las…
Hello there! Welcome to the next Dev Corner, where we might present something we’re working on or gauging people’s thoughts on mechanics and other things. Those of you who have been keeping up with our trailers, teasers, and dev corners hav…
Generals! Hello, I’m Zwirbaum, Game Designer for Hearts of Iron, and I want to welcome you to yet another Open Beta SE™ (Not really trademarked) Update for Hearts of Iron IV. This week I am bringing more of the experimental features and cha…
Hello all! In today's Dev Corner, we're diving into the economic crossroads of Romania. Like many nations in the 1930s, Romania was torn between its agrarian foundation and a push for rapid industrialization. What makes it unique, though, i…
Greetings, generals! We are Alex, Norrman and Marijn211, modders of the game and now cooperating with Paradox, and today we’re showing you tidbits of a future DLC for… Romania! As explained below we won’t go into too much detail yet as not …
Generals! Hello, I’m Pdxen, Tech Lead for Hearts of Iron and I want to welcome you to the second update of the Summer Open Beta. In this update we are changing the topic from balancing to updating the tech stack of the game. A lot has happe…
Hi everyone, Jamor here again. I want to thank you for good, informed feedback and suggestions in the previous airborne dev corner. I hope I can benefit from the community’s collective insight once more. Up to this point, unit quality acros…
Hello all! Today we're kicking off a new round of Dev Corners, this time turning our attention to a project we haven't touched on yet. We'll start with some early questions around ideas we have in mind, while future Dev Corners here will ge…
Hello, I am Zwirbaum, Game Designer for Hearts of Iron, and it is once again the unfortunate for you my time in the dev corner spotlight. Anyways, without further ado, let’s get started with today’s topic - Military Production. And once aga…
Hello, I am Zwirbaum, Game Designer for Hearts of Iron, and uncharacteristically for me, instead of writing an entire wall of text, I am just going to ask a couple of questions that are very much tied to the ‘Economy’ side of the gameplay. …
Generals! High Command is aware that certain war correspondents have, in recent days, taken it upon themselves to question senior staff. Studio Manager Gorion and Game Director Batya were located, escorted without incident down to the Bunke…
Hi all, it's time for the next Dev Corner. I'm Jamor. I started as a producer on Stellaris, Imperator, and other games back in 2017, and now I'm happy to be back as a designer on HOI. Hearts of Iron 2 was my first PDS game, and I've had a l…
Generals! Hello, I’m Zwirbaum, Game Designer for Hearts of Iron, and I want to welcome you to the first update of the Open Beta SE™ (Not really trademarked). To avoid writing too much, and boring everyone to the death, as I am fairly sure -…
Hello all! First of all I want to be extra clear - we are not talking about a rework for civil wars. What I am after is understanding how you’ve enjoyed content with civil wars, what feels good, what doesn’t feel good. So! When you start a …
