Update log
Full Hearts of Iron IV update
The complete published notes, normalized for clean reading and source attribution.
Repeated intro
Greetings, commanders! In this last but definitely not least developer diary, we will show some smaller mechanics that are shared across all focus paths. Following that, we will preview the art and other assets you will find in the DLC.
Extracted changes
- Balance
- Gameplay
- Maps
- Events
Army Readiness
The last new mechanic that we will be discussing is the new Army Readiness Balance of Power, enabled briefly after the game starts. The Czech army, while well prepared to face the Sudetenland crisis in 1938, was being undermined by various forces within the country in the lead-up to the Munich conference. This balance of power will represent that.

The army wouldn’t mind if a few Korunas went missing…

The national spirit will scale based on your readiness level
Weapons Sales
Weapons exports played a major role in the Czechoslovak economy and arms production, therefore we have several focuses that have effects on weapons sales. These have been made to adapt to Arms Against Tyranny ownership:


Arms Against Tyranny effects on the left, with effects for players without the DLC on the right.
For players who own Arms Against Tyranny, various focuses and decisions will encourage AI nations to buy equipment from you when seeking to resolve their deficits. While for players that don’t own this DLC, we’ve made a simple arms trade decision system that will allow you to still profit from arms sales as well.
Non-Czechoslovakia Content
While this is a Czechoslovakia-based DLC, there are some related nuggets of content on other nations included in the Focus Pack that I would not be remiss in quickly going over the ones of note.
Czechoslovakia’s industry was a massive part of the Reich's war machine during the war. Germany will now have a focus to further integrate the Czechoslovak manufacturers into their industry if you own the DLC.

There are different but similar effects for those without the Arms Against Tyranny DLC
Owners of the Focus Pack will have access to a new Special Project based on the German Rӧchling shell and a corresponding technology in the Artillery page.

More Piercing is never a bad thing

Sabot, not to be confused with the frozen treat Sorbet
Some of Czechoslovakia’s neighbors will get access to some of their Concerns/MIOs depending on various conditions. For example:

Třinec Ironworks, not to be confused with the drink Tonic Water
Something we saw a lot of requests for when the DLC was announced, and since then, was whether the Slovak–Hungarian War or “Little War” would be represented. While it was tricky to include due to the many moving parts your average Hearts of 4 game has before 1939. If you own the DLC and you’re playing Hungary, all things in the game being historical up until that point, you’ll have the chance to initiate a border war with Slovakia under the right conditions as a way to represent this neat sidenote of pre-World War 2 History.
Can’t we all just get along?
Last and certainly not least are some new Train-Based MIO/Concerns for all the starting majors except Japan. These six are available for everyone for free, regardless of whether you have the DLC or not. We wanted to add a little bit of free content with the patch, and these were a good way of doing that. Why Train MIO/Concerns? Simply put, we love trains… a lot. The British and American Train MIO’s have a decent amount of custom traits in them as well. But you’ll have to wait for the patch to get a peek at those particular ones.
Choose your track wisely: Productivity or ...Moscow!
Well, do you recognize your local supplier?
Art
Čau! This is Abbus, who works in the art front. As we deeply acknowledge that ‘aesthetics’ is one of the elements for an enjoyable playthrough, here is a glimpse of what you will see in-game:
Fortune favours the bold! Here is the overview when you select Czechoslovakia from the Bookmark selection with our content enabled.
Specially crafted with nostalgia in mind
Are you ready to command them in the field?
I'm sure your infantry divisions will appreciate those domestic equipments
Artillery Only™ enjoyers included
I Like Trains *whoom*
The industrial strength of Czechoslovakia would be shown through the graphics of various domestic equipment (not limited to above)
There’s no reward without effort.
Portraits & Landmarks
To further achieve what ‘ aesthetics ’ we believe in, Paradox invited Rocketbrush to support us with these exceptional portraits and 3D models. We communicated with them closely to ensure we will be able to deliver what we strive for:
Prague Castle and Bojnice Castle
Politicians who will guide your country.
And commanders who will lead your armies.
With some of Czechoslovakia's brightest.
Music
There will be two music tracks in this DLC, one variant of Škoda lásky (aka Rosamunde) and another one from scratch (we really love it!), provided by talented composers working with Paradox. Remember to turn on your radio and stay tuned.
Achievements
Attention gamers and achievement hunters, here are the achievements that will be added with Peace for Our Time’s release:
I’m playing both sides, so I always come out on top Sell weapons to both sides of a civil war
I didn’t hear no bell As democratic Czechoslovakia, become the 2nd republic by losing the Sudetenland and then grant autonomy to Slovakia, and then capitulate Germany.
Premyslid's Dream As monarchist Czechoslovakia, integrate both Austria and former Bohemian lands.
Kuťáci As Czechoslovakia, build every facility type.
First train home As Czechoslovakia, own any state of the Trans-Siberian Railway.
Ain't like that now As fascist Czechoslovakia, complete "Return to Democracy".
Czechoslovaustrohungarian Union As communist Czechoslovakia, complete "Expand the Union" and have Austria and Hungary in that union.
We are also planning a Live release stream shortly before release so keep an eye on our YouTube and Twitch ~
If you are in the official Hearts of Iron Discord, you can receive notifications when we’re live with this Event!
To check out Expansion Pass 02, click HERE or the image above for more information!
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