Hearts of Iron IV

Paradox Development Studio · Paradox Interactive

Released
Jun 6, 2016
Platforms
Last updated
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Updates & announcements

20 posts
  1. Developer post

    HOI IV Dev Corner | One if by Land, Two if by Sea, Three if by…Air?

    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 more. As you can likely surmise by the

  2. Developer post

    HOI IV Dev Corner | Industrial Might & Military Production

    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 had a lot of feedback around it. We n

  3. PCGamesN

    The next Hearts of Iron 4 expansion is delayed, as Paradox tries to reduce "mental overhead"

    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 reduce "mental overhead"

  4. Developer post

    Studio Gold Update | September 2026

    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 last several weeks. And while dates are alw

  5. Developer post

    HOI IV Dev Corner | Inlay Windows & Congress

    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 have probably figured out that we’re workin

  6. Developer post

    HOI IV | Open Beta SE™ Update 3.03

    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 changes, which may or may not end up in t

  7. Developer post

    HOI IV Dev Corner | Romania, an Industry Divided

    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, is the sheer scale of this divide, with

  8. Developer post

    HOI IV Dev Corner | Romanian Crossroads

    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 everything is finalized, but this als

  9. Developer post

    HOI IV | Open Beta SE™ Update 2

    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 happened with computers since Hoi4 was relea

  10. Developer post

    HOI IV Dev Corner | Army Quality and Expertise

    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 across the board in HOI has been fairly unif

  11. Developer post

    HOI IV Dev Corner | National Focus Flavor

    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 get a lot more specific about the country

  12. Developer post

    HOI IV Dev Corner - Military Production

    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 again I will resort to acting a bit myste

  13. Developer post

    HOI IV Dev Corner | Civilian Economy & Consumer Goods

    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. And those are as follows: How do you

  14. Developer post

    HOI IV Creator Interviews with Leadership

    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 Bunker, and placed before the cameras for a t

  15. Developer post

    HOI IV Dev Corner | Warfare in the Third Dimension - Airborne Units in HOI

    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 lifelong obsession with the story of t

  16. Developer post

    HOI IV - Open Beta SE™ Update 1

    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 - you will likely skip to the patch notes

  17. Developer post

    HOI IV Dev Corner | Questions about Civil Wars

    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 game with a country that has a civil w

  18. Developer post

    HOI IV - Open Beta Summer Edition™

    Generals! Greetings from sunny Stockholm to everyone, I’m Batya, Game Director for Hearts of Iron. The summer period is upon us and I wanted to share some information with you all. Unlike the norm of armies planning summer offensives, game developers actually do the opposite and

  19. Developer post

    Thunder at our Gates | Patch 1.19.2

    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 balance changes but for that we’d like to r

  20. Developer post

    Steam Summer Sale | Up to 80% Off!

    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%. Thunder at our Gates just released, did you review all your briefing material? The Official Thun