Hearts of Iron IV Dev Tracker

Generals!
For the next several days you’ll be able to test some things and give us all your feedback in this thread[forum.paradoxplaza.com].
You can play around, test and give feedback on anything you like, but our focus will be on these points:
  • Equipment Designer - We’ve added functionality to save your designs across game sessions. Save a tank/ship/plane design in one playthrough, and load it up in another.
  • Also added is the ability to share designs with friends using the import/export feature.

  • Saadabad Pact Branch - Iraq, Afghanistan, Iran and Turkey are getting a shared branch that allows them to cooperate more with one another.
  • Iran is getting some extra characters and focuses, including scientists and generals.
  • Afghanistan is also getting some extra characters in the form of a communist country leader and some new advisors.
  • Iraq’s Kurdistan branch is being expanded upon

We’re working hard on polishing Graveyard of Empires content on multiple fronts with the addition of new focuses... Read more
Generals!
Command has issued another survey from Research & Development in order to understand our battlefield a bit better, looking into what similar games you interact with, your different playstyles and preferences, and overall your experiences across the community.
Whether you're a seasoned veteran, a casual roleplayer or someone just getting started, your feedback will help us design features and experiences that better reflect the way you play.
To participate in the Survey, you can click HERE[www.surveymonkey.com] or on the QR code below, which can also be scanned.
Update - 07/04/24 - Thank you for getting involved with our survey, we have closed submissions in order to begin processing the results!
[www.surveymonkey.com] Read more
Generals!
We are back with our latest War Effort patch of the year, which contains a bunch of bugfixes, some balance changes, and tweaks to the game. But before we get to that, we have some words from @Wrongwraith
Hi everyone,
I’m Thomas, the Design Lead on Hearts of Iron.
It’s time for another War Effort, and it’s a big one.
Our primary focus for this War effort has been bug fixing — we’ve addressed a wide range of issues across the game to improve stability and polish. However, we’re not just fixing bugs; we’re also delivering balance tweaks, gameplay adjustments, and other enhancements.
This time around, from a balancing point of view, we’ve mainly looked at Armored Cars and Tanks. The reasoning behind this is that we felt that, as many of you have pointed out, it was usually better to make a cheap light tank than to use Armored Cars. While this is not entirely wrong from a historical point of view, it was a bit too much.
So we adjusted a few things with armored cars to make them slightly ...
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Dear fans,
Today's Patch for Operation Knee marks the second release in a series of updates that we are doing to improve the game. Next week we aim to release the War Effort patch, which as Arheo said previously will be more substantial than usual.
I also want to take this opportunity to circle back to a few topics that Arheo brought up last week, as well as start providing a few glimpses into the short- and long-term future.
Conclusion of the Expansion Pass Next up in this pass is the Prototype Vehicles Unit Pack which adds vehicles that are more experimental in nature. Some will be available right away while others you will need to unlock through special projects. The unit pack continues to expand on the cool, detailed art we have in the game already, however it will not feature new in-game functionality.
Dev Corners Return One important take-away from the development of all the content in this Expansion Pass is the need to better and earlier involve you, our community. Our Dev Diaries... Read more
Chain of Command: Devs vs. the HOI4 Community: 1800-2000 CEST, 10/11/12 June
Everything you need to know
Tomorrow at 1800-2000 will be the first session of a special kind of Three Day War: It's the Devs vs. the Hearts of Iron IV community at large, spearheaded by four content creators.
Each team will be playing entirely within one nation: Imperial Germany for the Devs, and Democratic Britain for the Community team.
We've taken the 'democratic' element literally, electing a Virtual 'House of Commons' from across the HOI community to vote on and discuss the strategy for the UK. Some actions will be decided by what the house wants, not just the four players.
Read on below to find out about what the 'Virtual House of Commons' has been up to in preparation for the event.
There will be a two-hour session of the event streamed each day from June 10th - June 12, live over on our Twitch channel.
https://www.twitch.tv/paradoxinteractive
Make sure you sent a reminder on the right of this page so ... Read more
Update: The Polls have closed and the results are in!
We can certify that SwedishKaiser, Dankuser, Spartacus, Coffee Monster, Acy, Matius, Joseph, and Toastyman, are duly elected to serve as Members of (virtual) Parliament for the Steam constituency.
Congratulations to the winners and commiserations to those who didn't make it.
We will be in touch with the winners shortly to invite them to the Discord.
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Yesterday's Election Details [vote closed]
It's election day for the 'virtual House of Commons', as part of our chain-of-command multiplayer event next week!
If you missed the information about this event a few days ago, we're having a group of ordinary HOI players from across the community take part in advising and voting on strategy for the community team (made up of YouTubers and Streamers) via Discord.
Click here to see full event info
Below is the shortlist of candidates from all the applications we got on Steam. You can find a link to vote at the bottom. There will be eight represe... Read more
1.9.3 "Husky" is now live and downloadable through Steam. Checksum is a7a4.
We should be compatible with 1.9.2, but if you for some reason want to remain on 1.9.2 or older Here are instructions for reverting to patches since 1.5.4[forum.paradoxplaza.com], or special instructions for 1.5.3 and earlier.[forum.paradoxplaza.com]
Please make sure that any mods you are using are updated for 1.9.3, or your game might not run properly (seriously)
If you discover any bugs in patch 1.9.3, please report them in the bug report forum[forum.paradoxplaza.com] as usual.
For the ones who were on the beta and experienced performance issues with the latest update, things should be back to normal now.
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######## Hotfix 1.9.3 "Husky" ########
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# Balance
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- decreased suppression value of SP-Art battalions
- decreased suppressi... Read more
Today's Dev Diary by Podcat[pdxint.at]
Hi everyone! This week is Hearts of Iron IVs 4th anniversary. I’ve got some cool data to share with you, new armor and radio packs as well as patch for you to celebrate! All of this releases tomorrow :)
A Look Back & Cool Numbers
It's crazy how Hearts of Iron keeps growing. I personally started with playing HOI2, and worked on HOI3 as a coder and game director on HOI4, and while people still call it a niche experience for WW2 buffs, it has also grown to be so much more (or us WW2 nerds are more numerous than we think :D). Around La Résistance release we clocked a new record on monthly players of 899k (the 1000 of you that didn't log in that month are responsible for my OCD flaring up!). HOI4 is quite unique in how stable the growth is. Most games that aren't multiplayer or the like usually has big dips between releases. I think the two big factors that keeps us so stable is the replayability as well as the amazing mods that keep updating giving peo... Read more
Chain of Command Multiplayer - Developers vs. The Hearts of Iron Community
It's Hearts of Iron IV's 4th anniversary on June 6th, and to celebrate we're holding a multiplayer event for the ages.
From June 10-12 a team of four heroic content creators, backed by the wider
Hearts of Iron community, will do battle with a team of four of the most dastardly devs around.
For the first time in an official multiplayer event, you can participate, helping to shape the community teams strategy and choosing its leader. Read on to find out how.
It's going to be a chain-of-command stream, meaning that all each team will be playing one nation; Democratic UK for the Community team, and Imperial Germany for the Devs.
The Developers won't just be playing against the four players controlling Britain, but also a 'Virtual House of Commons' made up of ordinary Hearts of Iron players from all kinds of different communities.
The Virtual House of Commons will, via Discord, choose which of the four players will b... Read more
Join Fiona and Daniel once again at 14:00 CEST for the penultimate episode of our tutorial stream series.
Tune in over on twitch: https://www.twitch.tv/paradoxinteractive
1.9.2 "Husky" is now live and downloadable through Steam. Checksum is a73d.
We should be compatible with 1.9.1, but if you for some reason want to remain on 1.9.1 or older Here are instructions for reverting to patches since 1.5.4,[forum.paradoxplaza.com] or special instructions for 1.5.3 and earlier.[forum.paradoxplaza.com]
Please make sure that any mods you are using are updated for 1.9.2, or your game might not run properly (seriously)
If you discover any bugs in patch 1.9.2, please report them in the bug report forum as usual.[forum.paradoxplaza.com]
For the ones who were on the beta and experienced performance issues with the latest update, things should be back to normal now.
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######## Hotfix 1.9.2 "Husky" ########
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# Bugfix
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- The Bell Tolls for Us achievement should now trigger when winning the c... Read more
Hi everyone I hope you are enjoying 1.9.1 and La Resistance. Today will be a smaller diary to let you know that we are putting out a beta for 1.9.2, and also to fill you in on what the plan is now moving forward into next expansion work.
1.9.2 Beta
Since we came back from easter we have been working hard on nailing down some stubborn out of sync bugs. Some of those still elude us so the quest continues but we have also gotten some other things dealt with.
1.9.2 Changelog (so far!)
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# Balance
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- added mil factory to china that was incorrectly set up in 1.9.1
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# Bugfix
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- Soviet now retains the old behaviour of sending volunteers to spain
- Fix end of civil war events no longer firing (initially reported on German Civil war)
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# Stability & Performance
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- Fixed OOS related to different language settings ...
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In this week's 'World War Work From Home', our tutorial streams enter their third week.
If you're new to the game or can't wrap your head around a certain mechanic, then this might be the stream for you!
Tune in at 14:00 CEST at: https://www.twitch.tv/paradoxinteractive Read more
Today's Development Diary by Podcat[pdxint.at]
Hi everyone and surprise! We just released 1.9.1 to make sure you guys get all the fixes by easter. We are currently investigating some out of sync MP issues that are proven to be incredibly stubborn to nail down, so a 1.9.2 is planned after 1.9.1 to address that. Otherwise 1.9.1 has shaped up to be one of the bigger patches we have done with tons of fixes and I want to thank everyone who has helped out by reporting bugs and testing the open beta.
Today I also want to share another update to the roadmap like we usually do to the end of a patch cycle. Its both grown in some entries as well as had a couple checked off as of La Resistance.
1.9.1 Patch
This weeks update to the patch is a mix of bugfixes and balance. We noticed that after fixing various ai problems and tweaking balance that Germany and Japan was performing way too good again, so we've tightened up effects from resistance in occupation a bit more compared to last week and given chin... Read more
It's Patch time!
Over the last few weeks we've been running an extensive Beta patch to add some extra content as well as balance and bugfix changes introduced in 1.9.
1.9.1 "Husky" is now live and downloadable through Steam, with a slew of fixes and improvements to 1.9.1. Checksum is 6d23.
We should be compatible with 1.9.0, but if you for some reason want to remain on 1.9.0 or older Here are instructions for reverting to patches since 1.5.4.[forum.paradoxplaza.com]
Please make sure that any mods you are using are updated for 1.9.1, or your game might not run properly (seriously)
If you discover any bugs in patch 1.9.1, please report them in the bug report forum[forum.paradoxplaza.com] as usual.
The full patchlog is too long to copy into steam, so to see its entirety, click here[forum.paradoxplaza.com] Read more
In this week's 'World War Work From Home', we're continuing our tutorial series which began last week.
We'll be covering all the basics, including national focuses, research choices, template and ship designs, and much more. We'll be running this tutorial for a few weeks to make sure we can fit all the important bits in.
If you're new to the game or can't wrap your head around a certain mechanic, then this might be the stream for you!
Tune in at 14:00 CEST at: https://www.twitch.tv/paradoxinteractive Read more
Today's Development Diary by Podcat [pdxint.at]
Hi guys, another week another patch update. We are now focusing on stabilizing it and preparing it for release once its gone through testing.
A cool thing we have added this week is new 3d models for Spain and Portugal. All the different civil war sides in Spain now look different. Here is a fancy render of what they look like in detail:

(pardon the german guns for the renders tho ;D)
Check out the changelog since last week:
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# Balance
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- neutral government can do collaborations now
- If Britain or France decide to abandon Czechoslovakia or Yugoslavia in their respective event chains, any guarantees they have made to those countries are revoked
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# Bugfix
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- fixed civil war flags not being cleared when country is annexed by an effect and causing script issues
- fixed some occupation modifiers wrongly being applied after...
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Paradox COVID-19 Response Fundraiser
In order to support the global response to COVID-19, Hearts of Iron is taking part in a fundraising sale on Steam, with deep discounts on Hearts of Iron IV alongside other Paradox titles. All proceeds from the promotion are being donated to the COVID-19 Solidarity Response Fund for WHO.[covid19responsefund.org]
https://store.steampowered.com/app/394360/Hearts_of_Iron_IV/
As well as Hearts of Iron IV, there are also discounts on Surviving Mars, Cities Skylines, Age of Wonders Planetfall, BATTLETECH, Shadowrun, Tyranny, Pillars of Eternity, and Knights of Pen and Paper 2.
You can click through to see the full list of discounts with this link: https://store.steampowered.com/publisher/paradoxinteractive/list/58320
The sale will last four days, from 19:00 CEST on March 31st, to 19:00 CEST on April 3rd. Read more
In this week's 'World War Work From Home', our resident Hearts of Iron IV expert Da9L will be starting teaching the game to an absolute beginner.
We'll be covering all the basics, including national focuses, research choices, template and ship designs, and much more. We'll be running this tutorial for a few weeks to make sure we can fit all the important bits in.
If you're new to the game or can't wrap your head around a certain mechanic, then this might be the stream for you!
Tune in at 14:00 CEST on April 1st at: https://www.twitch.tv/paradoxinteractive Read more
Today's Development Diary by Podcat[pdxint.at]
Hi everyone! We are still in quarantine at home working on the patch, so time for another update!
Its a meaty chunk of balance fixes, bugfixes and mod support. Also there are some special highlights after I recommend to read up on as we are looking for feedback there. So, without further ado...
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# Balance
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- operations will now higher cost as you execute same operation on same targets (default is 15%. rescue operation is still 0%. Some exceptions are 25%)
- neutral countries no longer allowed to create collaborations
- compliance is now halved (instead of factored by 75%) when a state controller is changed
- destroying the counter-revolution now prevents France from descending into another civil war against the fascists from low stability again
- Danzig and Memel are no longer required for forming Poland-Lithuania
- Memel is no longer required for forming the United Baltic States
- Po...
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