Hearts of Iron IV

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

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…

Generals! Today marks the last pre-summer patch with fixes and tweaks to Thunder At Our Gates. After this the team will have limited presence in the office for the summer period. We know that this patch does not hit all the sought after…

Generals! ️ Summer is officially here and with it we bring you the latest Summer Sales, including unprecedented discounts. The Steam Summer Sale has started, with discounts up to 80%.…

Generals! We decided it would be best to run 1.19.2 as an Open Beta over the weekend to get some potential player input over the weekend. This will allow us to make any necessary fixes as well that might pop up as a result from having a…

Generals! It’s been a week since launch, and we are working on our usual post release support. 1.19.1 released yesterday, doing a first balance pass, as well as quite a few encountered issues. We are working on 1.19.2 to be released before…

Generals! Thanks for all of the feedback we’ve received over the last few days. We’re hard at work addressing as much of it as possible and plan to incorporate more into another patch that will happen later down the line. The main issues we…

Generals! Thunder At Our Gates is officially out now! Jump into the thick of the South-East Asian rainforests and battle your way through to victory. Or if you prefer a more grainy environment, stick to the Australian continent and send…

Generals! Tomorrow at 18:00 CEST we’ll be releasing Thunder at our Gates. It feels like only two months ago that we brought you Peace for our Time. Accompanying this release we’ll bring you Patch 1.19.0 and, just like the recent Anniversary…

Greetings everyone and welcome to the Art’s Developer Diary for the upcoming DLC Thunder at our Gates! We are looking forward to showing you what we’ve been cooking up behind the scenes. We’ll be showing off a selection of: Fresh Focus…

Generals!To celebrate the 10th Anniversary of Hearts of Iron IV, and based on your feedback from the community merch survey, we have partnered with PrintClever to bring you the official Hearts of Iron IV Merchandise Store.The war rooms of…

Generals! The Decade A decade. It still feels strange to write. Hearts of Iron IV turns Ten this month, and somehow the most unbelievable number in our telemetry isn't the millions of techs researched or wars declared, it's this one: 39% of…

If I were extremely funny, I’d start this off by typing something like “G’day mates”, but a simple “hello gamers” will have to suffice this time. Welcome to this dev diary, where I’ll take you through the new bigger feature coming with the…

Sawasdee khrap! Today we will go through the focus tree for Siam, today known as Thailand. ContextBefore the start of the game Siam had lost territory, mainly against the French but also against the English. Large portions of Indochina were…

Selamat siang to you all once more. This dev diary is once again brought to you by Pdx_lily, and this time I’ll be showing you all the revolution content for Indonesia. As per usual, everything here is still in development and may change.…

Selamat siang, Sugeng sonten, Wilujeng sonten, Rahajeng sore, and Goedemiddag to you all! My name is Pdx_lily, and I will be your host for today’s dev diary about Indonesia, also known as the Dutch East Indies (do note I will use these…

Generals! Here is another Open Beta Update for our upcoming Anniversary Patch, including some bugfixes, balancing and more naval AI improvements. We recently posted a survey as a way to check the community pulse, and it has given us…

Generals! It’s time once again to talk, even if I consider myself a man of action. In this dev diary we’ll go over these new Thunder at Our Gates Features: Ship Captains, and our Division Designer rework, which includes Regimental Support…

Generals! Batya here with another patch. The focus is around Czechoslovakia’s content that was recently released with Peace For Our Time. Besides that there have been a few crashes that were fixed and included in this patch. I also want to…

G’day mate! Punchrullar and Mordred Viking are back again to give you the lowdown on the more radical ideologies down under: Fascism and Communism. Australia in this period was a relatively stable democracy, but there were certainly groups…

G’day mate! From the trenches of game development, we, Punchrullar and Mordred Viking, finally emerge. The time has come for the land from down under to undergo its long-awaited revision, and for the nine year old Australian content to get…

Generals! Pack your raincoats and shorts because we are going to the jungles of Southeast Asia and the arid plains of Australia. Dark clouds gather and a rumbling can be heard in the distance; Thunder is coming. Today we announce the…

Generals! Today we have an update to the open beta, including a sneak preview of the anniversary patch we have planned. This update includes quality of life improvements, bugfixes, gameplay and balance changes, naval AI improvements, and a…

Generals ️ To celebrate the recent release of Peace for our Time we're extending the Steam Sale for Hearts of Iron. Get up to 70% off Hearts of Iron. Start the music, get moving, and grab those discounts. BASE GAME Hearts of Iron IV 70% off…