Hearts of Iron IV

Hearts of Iron IV

6,887 ratings
Hearts of Iron IV: The Great War
File Size
314.523 MB
Jun 8, 2016 @ 4:27am
Jun 28 @ 2:02am
35 Change Notes ( view )

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Hearts of Iron IV: The Great War



Status: Open Beta
Project Lead: Wolferos
Current Version: 0.5.4
Compatible with: Hearts of Iron IV "Cornflakes"
Supported Languages:
- English
- French (Integrated in the Mod)
- Russian (Integrated in the Mod, Спасибо https://www.strategium.ru)
- Japanese (日本語化MOD, +JP: The Great War)
- Polish (Polskie Tłumaczenie)
- Turkish (Türkçe Yama[paradoxfan.com])
- Chinese (Current Status)
- German (warning, experimental stage)
- Korean (Korean Translation)
- Portuguese (warning, experimental stage)
- Spanish (warning, 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
  • German Empire
  • Austria-Hungary
  • French Republic
  • United-Kingdom
  • Russian Empire
  • Kingdom of Italy
  • Ottoman Empire
  • United States of America
  • Empire of Japan
  • Soviet Union
  • Serbia
  • Bulgaria
  • Mexico
  • Netherlands
  • Belgium

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

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
  • More National Focus Trees
  • Improved GFX and More 3D Models
  • More Technologies
  • More Flavor Texts
  • More Country Leaders, Political Advisors, Generals, Admirals
  • Game Balancing and Improved AI Decisions
  • 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: 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 download it on Mod DB or on NexusMods[www.nexusmods.com].

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  • MasterWaifuman
  • skullbe
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  • Benoît (Mundus Bellicus)
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  • Felixiinho
  • NicolasGrosjean

Flickering Flags Fix made by Chairman Meow
Austro-Hungarians Voices made by Geodomus


Show us your Support! 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 (488)
Jul 15 @ 6:23am
Bugs Reports 0.5.4
Jul 15 @ 1:51am
The Party of Fascism in the USA
Jul 15 @ 11:31am
Anyone made a good WW1 mod out of this horrible one?
< >
Kou 1 hour ago 
as Austria-hungary 1915, serbs wont assasinate arch duke franz ferdinand, no ww1 this time huh "great war mod".
KEKMaster3000 5 hours ago 
how can i get usa in war?
Constant crashes after war is declared.
BigManJim 21 hours ago 
Could you please make WWII focuses for more nations, and the Treaty of Versailles more consistant. I've played 2 Germany games then lost to see what would happen and it didn't trigger. It would also be nice to have a demiliterazation period and more stuff happen in the interwar period. Thank you for creating this mod and i wish to see it improve and become better.
The Doctor 21 hours ago 
The focus trees are boring af
Kinny09 Jul 15 @ 2:17am 
The Ottomans won the bulkan war and annexed serbia. Now WWI wont start.
FulmenTheFinn Jul 14 @ 10:55pm 
Is this mod going to incorporate infrastructure affecting construction speed and resource gain? I ask because the former has been a feature in the base game for 1,5 years, while the latter for over 4 months now. It'd be nice to get the mod on par with vanilla's features.
CutesMicha Jul 14 @ 4:37pm 
My game is always chrashing when Italy declares war on Turkey in 1911. Is there any way to f ix that?
mud pig Jul 14 @ 4:09pm 
italy and germany still have their leaders
AstHero Jul 14 @ 5:08am 
Fix a bug with Southern Bulgaria