Hearts of Iron IV

Hearts of Iron IV

3,155 ratings
Hearts of Iron IV: The Great War
File Size
291.873 MB
Jun 8, 2016 @ 4:27am
Feb 23 @ 8:21am
22 Change Notes ( view )

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Hearts of Iron IV: The Great War


Status: Open Beta
Project Lead: Wolferos
Current Version: 0.2b
Compatible with: Hearts of Iron IV, Patch 1.3.3 "Torch"
Supported Languages:
- English Language
- Chinese Language (本MOD提供汉化版本,汉化补丁链接)
- Turkish Language (Türkçe Yama[paradoxfan.com])
- Russian Language (Integrated in the Mod, Спасибо https://www.strategium.ru/)
- French Language (Integrated in the Mod, not finished, experimental stage)
- German Language (Integrated in the Mod, not finished, experimental stage)
- Japanese Language (日本語化MOD, +JP: The Great War)
- Spanish Language (Integrated in the Mod, not finished, experimental stage)


One hundred years ago, a war in Europe erupted which would change the world as we know it. Men were forced out of their homes, from their farms and apartments, to fight in seemingly neverending trenches, gaining meters and meters of ground a day at the cost of massive casualties.

Hearts of Iron IV: The Great War, an overhaul mod for Hearts of Iron IV, puts you in the position of one of the countries of the world in World War One's time period. In an era where the stakes were high and risks even higher, you'll have to tread lightly when it comes to diplomacy. A single mistake or a single bluff gone too far could mean the deaths of millions.

Of course, that's not to say that the Great War is the only thing on anyone's minds. Revolution is flaring up in China and Mexico, Italy is rumored to have designs on taking Libya, and the Balkan States seem to be banding closer against one of their foreign targets. With all this conflict across the world, the Great Powers alone won't be having all of the fun.

The War itself has been modeled to match more closely the flow and style of war of World War I. Infantry virtually alone will rule the Battlefield at the beginning of the Conflict, before Planes and Armored Cars will take the field in good numbers. Trench Systems will see construction throughout Europe, until a mad engineer's dream, the Tank, rolls out of the factory and onto the Battlefield. All the while, massive fleets of massive Dreadnoughts will fill the Oceans, with all sides vying to wrest control of the waters.

With elaborate National Focus trees that delve deep into Alternate History, you may find two games with the same country end up completely differently. What if French Socialists began a great civil war during the mutinies? What if Italy decided to go hardline and fight with the Central Powers? In Hearts of Iron IV: The Great War, the smallest divergences can change everything.

Hearts of Iron IV: The Great War, of course, is designed to attempt to emulate how Paradox themselves would have designed the scenario, so veterans of the World War II scenario and of the Hearts of Iron franchise will have no trouble adjusting. Even the new models, sounds, and animations are designed with Paradox's standards in mind. You may just settle into the game so quickly, you'll wind up with trench foot and shell shock before you realize it.


Two Starting Scenarios
  • 1910 - The Powderkeg of Europe. Guide your nation through events like the Balkan Wars and Agadir Crisis as the road to war begins to be laid out.
  • 1914 - The Great War. Jump straight into the action of the historical First World War. Can you avoid the mistakes of history, or will you find yourself falling into even worse traps?

New National Focus Trees for
  • The German Empire
  • The Austro-Hungarian Empire
  • The French Republic
  • The United-Kingdom
  • The Russian Empire
  • The Kingdom of Italy
  • The Ottoman Empire
  • The United States of America
  • The Empire of Japan
  • Serbia
  • Bulgaria
  • Mexico
  • Netherlands

New and unique weapons of warfare:
  • New Armored Car unit
  • Brand New Doctrines designed for World War I
  • Technologies simulating Gas Warfare
  • New Light Machine Gun, Trench Mortar, and Flamethrower Technologies
  • The New "Trench" building
  • More than 500 Technologies
  • Doctrines for the World War I

Real events from the time period
  • The Assassination of Archduke Franz Ferdinand
  • Alternative Scenarios to begin the Great War
  • The Xinhai Revolution
  • Several steps of the Mexican Revolution
  • The October Revolution
  • Tons of Historic News Events for added flavor
  • Regional Events for all Major Powers
  • And so much more...

News 3D Models for
  • Infantry
  • Tanks
  • Planes
  • Armored Cars
  • Zeppelins
  • Cavalry


  • More Treaty events to replace the Peace Conferences
  • Interwar Period Events (Dissolution of the Ottoman Empire, Japanese invasion of Manchuria, etc.)
  • More National Focus Trees (Soviet Russia, Romania, Belgium, Greece, China, etc.)
  • More 3D Models (Fokker Dr.I, British Soldier, Bulgarian Soldier, etc.)
  • Improved GFX
  • More Technologies
  • More Flavor Texts
  • More Country Leaders
  • More Political Advisors
  • More Field Marshals, Generals, Admirals
  • New Language Localisation
  • Game Balancing
  • Improved AI Decisions
  • Interwar Period
  • And even more than that to come...


Q: Is this Mod Ironman Friendly?
A: We've modified way too many files for this to ever be Ironman Friendly. If we had the sort of magic to make it so, we'd be in Stockholm right now.

Q: Is this Mod playable in Multiplayer?
A: Yes! It's a great way to spend a saturday night, just make sure you boys don't let carried away and let that stretch to monday morning.

Q: Any recommended country?
A: The German Empire, the Austro-Hungarian Empire and the French Republic are always a good choice to start with in 1910 or 1914 but you are free to try any country that you want.

Q: This Mod seems cool! Can I help you?
A: Yes, you can help us, we have a GitHub Repository[github.com] for that.

Q: Does this Mod support other languages?
A: Yes the Mod does support other languages that can be found in the Basics Informations Section. You can help us translating the Mod on GitHub[github.com]. You are more than welcome to help us.

Q: Will this Mod include Interwar Period and World War II?
A: We have already starting to work slowly on the Interwar Period and we have included some Vanilla National Focus for World War II.

Q: Where can I download the Mod?
A: We strongly recomand to use the Steam Workshop Version but you can also download it on Mod DB.

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Your support is very important for us! It kept us motivated through out all the development of the Mod. Don't forget to like us on Facebook, follow us on Twitter and Subscribe to our YouTube Channel.
Popular Discussions View All (229)
15 hours ago
Great Potential!
15 hours ago
PINNED: Bugs Reports 0.2 ~ 0.2a ~ 0.2b
May 19 @ 2:06am
I can make portraits for you
Killer Clown
< >
PrussiaStronk 1 hour ago 
fix german-russian border PLES
FFako 6 hours ago 
rip ottoman empire :( kebabos
☪TURKEY☪ 10 hours ago 
[3rc] Jeruzalem 15 hours ago 
can you please increase world tention generation? im stuck at 39% and i need manpower! why the hell is world tention so low during a freaking world war!!
Feeders Inc. May 25 @ 1:05pm 
I hope there will also be a focus tree for China.
ElCapitan May 25 @ 7:23am 
Question to the modders: Was a third starting point in the conversation? If you ever want to create one, I would find 1890 good. At that time, Bismarck was forced to resign, this year the Wounded Knee massacre took place and the Meiji constitution in Japan came into force. This is mentioned only marginally and as a small ideasor if a third starting point should be created by you. And a big praise to your mod. Despite its still very early stage very very stable and correct history. Thanks to you from me and the community.
keineemails May 25 @ 12:52am 
JoelCab That right, one point. The other is support other nations, or new wars.
JoelCab May 25 @ 12:14am 
It seems wierd that World Tension barely goes up from the breakout of the Great War. it makes it damn near impossible to access higher conscription laws.
keineemails May 24 @ 2:37pm 
Have you ever tried to do the thing with spain?
keineemails May 24 @ 2:35pm 
But this is not really important. Important is the dominance of demokratie parties in Reichstag since 1898, and the lack of demokratic reformers in the mod.
Seconde the useless things in the tree and that importants thing are missed.
Three that tension or thing which depents on the tennsion are wrong balanced