Update history
Latest Hearts of Iron IV updates
Search patches, hotfixes, and dev posts. Load more to keep browsing the timeline.
Browse updates
Published changes
Search updates. Filter by source or date. Open any row for the full patch notes, or load more to continue the timeline.
- Hearts of Iron IV
Developer Diary | Siam
Sawasdee khrap! Today we will go through the focus tree for Siam, today known as Thailand. Context Before the start of the game Siam had lost territory, mainly against the French but also against the English. Large port…
Event5 changesBalanceGameplay - Hearts of Iron IV
Developer Diary | The Republic of Indonesia and the National Revolution
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 developm…
Security21 changes1 numericMaps - Hearts of Iron IV
Developer Diary | The Dutch East Indies
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…
Event18 changesUI/audioBalance - Hearts of Iron IV
HOI IV | Open Beta Update VI
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…
Event29 changesFixCompatibility - Hearts of Iron IV
Thunder at our Gates: Ship Captains & Division Designer
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…
Patch notes12 changesGameplayMaps - Hearts of Iron IV
Hearts of Iron IV | Patch 1.18.2
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 p…
Event49 changesFixPerformance - Hearts of Iron IV
Developer Diary | Alt-stralia
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 w…
Patch notes19 changesFixGameplay - Hearts of Iron IV
HOI IV - Open Beta Update V
Generals! Before we head out on our 4-Day LOA we wanted to give you another OB update. Give it a try, leave us a lot of feedback here, and we'll be back soon to take it all in and make potential adjustments. How to join…
Announcement23 changesFixCompatibility - Hearts of Iron IV
Developer Diary | Australia: Until the Tide of Battle Swings
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 Austr…
Patch notes6 changesBalanceGameplay - Hearts of Iron IV
Thunder at our Gates Available June 11!
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 w…
Announcement4 changesGameplayBalance - Hearts of Iron IV
Dev Diary - OPEN BETA UPDATE IV
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…
Patch notes194 changes96 numericFix - Hearts of Iron IV
Extending our Steam Sale - Up to 70% off!
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 Hear…
Patch notes2 changesBalance - Hearts of Iron IV
Peace For Our Time | Patch 1.18.1
Generals! Here’s your first update since we released Peace for our Time last week. Fire up HOI, annihilate your enemies, get your puppets under control and connect with your allies. Then, let us know your thoughts, and,…
Event26 changesFixGameplay - Hearts of Iron IV
Hearts of Iron IV Community Recap
Generals! It’s time for your latest briefing. Make sure you read it, and comment below. Makeship Giveaway Results Last week we announced the HOI and Makeship Giveaway (Plushie and Socks) and you gave us some very fun an…
Announcement - Hearts of Iron IV
A new Hearts of Iron 4 DLC just gave a pivotal WW2 nation the chance to change history
The latest Hearts of Iron 4 DLC lets you fight back against the rising Nazi powers and reimagine a fundamental turning point on the road to World War II. The new Peace For Our Time focus pack, named after the infamous d…
- Hearts of Iron IV
Peace for Our Time | Available NOW!
Generals! Now that you’ve watched your entertainment; the first order of business: The 1.18 Patch Notes that we posted yesterday, read them. Want to roll back a version? You’ll find those instructions there as well. It’…
Event46 changesGameplayBalance
