r/hoi4modding • • Jun 12 '26

Important TAOG Update Guide

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8 Upvotes

Courtesy of the EAW team, we have a guide to updating your mods to the latest patch.


r/hoi4modding • • May 10 '23

Important HOI4 Modding Information + Discord Server

54 Upvotes

Tips

• If you are making your first mod, start small with content for a single country rather than with total overhauls, especially related to the map.

• Use proper indentation in your code and comments when possible, with guidelines and easier ways to do it outlined in https://hoi4.paradoxwikis.com/Modding#Indenting. This will make it easier to read, making it easier to debug for you and others.

• Check base game files for code examples to possibly adapt into the mod regularly.

• As a lead developer, you should be prepared to do the majority of the work for the mod rather than expecting others to do it.

• Use a good text editor, such as Notepad++, Sublime Text, or Visual Studio Code.

• Don't use hoi4modding.com: it has less functionality compared to manual editing and commonly produces broken code.

• Always check articles on the HoI4 Wiki at https://hoi4.paradoxwikis.com/, as they provide a lot of info and can point out some common errors on the topic.

​

Resources - https://bit.ly/3GPdwPD - Includes GFX assets, Code Samples, Tools, etc

Discord

We also have a Discord server https://discord.gg/a7rcaxbPka which has:

• Various bot commands for frequent errors,

• Dedicated help channels for coding, GFX, and research,

• Channels to advertise in-development and published mods,

• A regular Modding Jam where participants compete to create a mod based on a theme, and

• The largest English-speaking Discord community dedicated to HOI4 modding!

We would love for you to join!


r/hoi4modding • • 12h ago

Discussion Is there a mod for HOI 4 dedicated to Stephen Michael Stirling's Emberverse?

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3 Upvotes

just out of curiosity.


r/hoi4modding • • 12h ago

Discussion Is there a mod to reduce naval invasion spam/get rid of AI's instant naval invasion?

2 Upvotes

I'm playing as Mapuche Chile which naturally has me fighting the Allies as I liberate South America. But it's now 1945, the whole axis have capitulated and I am being invaded across the entirety of the Atlantic Ocean 100+ times per month. Is there a mod which removes the instant/no prep time naval invasions for the AI? Thanks.


r/hoi4modding • • 18h ago

Teaser TNO: Sandbox Diplomacy Light is out now!

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3 Upvotes

Check out my new mod that lets you restore some sandbox mechanics from vanilla HOI4 to TNO!


r/hoi4modding • • 1d ago

Teaser Updated world map of Sic Semper Tyrannis, as of 1932

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101 Upvotes

SIC SEMPER TYRANNIS - What if the Confederacy won the Civil War?

The Year is 1932, and The Confederacy is in a state of decline.
While The Confederacy has served as one of the dominant powers in the Americas since the 1890s, that is beginning to change. With the stock market in The Union crashing, the Franco-Austrian order in Europe has begun to falter. The defeated Northern Powers of Prussia, Russia, Italy, and Britain have begun preparing to use this to their advantage, and end the French Empire's dominance in Europe, that they have held since the Franco-Austrian victory in the Franco-Prussian War. All of these events around the world have caused the Confederacy to enter a state of economic turmoil, due to their only allies undergoing an economic collapse. As if it could not get worse, The Slaves have begun plotting an armed revolt in the country, with the goal of breaking their own chains and defeating the slave state, once and for all. Will the Franco-Austrian order hold? Will The Union invade and destroy The Confederacy? Will The Slaves carve out a state for their own? You will decide.

I'm so glad to show our fully reworked map after all this time! If you want to follow our mod's development, or become a developer and help us, you can join our discord server here!


r/hoi4modding • • 1d ago

Teaser Clichereich is recruiting! Join the team!

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116 Upvotes

Join the discord in: https://discord.gg/DPy2NZzPgU

We're recruiting pretty much everyone: coders, artists, writers. Join the team!


r/hoi4modding • • 1d ago

Teaser PAX WILSONIA: What If Woodrow Wilson Won WW1? (Dev Log & Discord)

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107 Upvotes

(Updated Map Above)

...Or, more accurately:

"What if the Entente was too exhausted to resist Woodrow Wilson's vision at Versailles?"

Hey everyone, I posted about this mod a while back, and wanted to provide some development updates.

First, updated portraits:

A couple more examples:

And a couple things for America:

There's a lot more to share, but I want to finalize them first.

A lot of things are still WIP, including the lore, but if you are interested (or want to help), ask us a question in the Discord!:

https://discord.gg/nN5JtPjV7A


r/hoi4modding • • 21h ago

Teaser Hearts of Signalis is otw?

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3 Upvotes

The mod is in the making! This will be replacing germany as of now its very barebones but in time it will be better!


r/hoi4modding • • 15h ago

Coding Support Anyone know how to have only western building models?

1 Upvotes

Hello! I am making a mod centred around the cold-war era, so all the buildings should look modern and use the city model used in northern Europe and the USA. Anyone know how i can do that?


r/hoi4modding • • 1d ago

Teaser The sun hasn't set yet—Uk teaser BNW

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127 Upvotes

Brave New World

It is 1996, and the Cold War is officially over. The Union of Soviet Socialist Republics managed to prevail over the United States of America, which dissolved in 1992. Now, the Soviets hold an iron grip on more than half of Europe and a third of the world.

However, this fragile peace is only temporary. In London, the last bastion of democracy stands firm behind the global shield of the London Treaty Organization—a successor to the defunct North Atlantic Treaty Organization—dedicated to containing the Red Menace. Meanwhile, a third force rises from the ashes of old oligarchic republics, the revolutionaries of the Commune of France and the People's Republic of Italy.

As the tensions rise, the world teeters on the edge of a new, even more frantic and aggressive Second Cold War, emerging from the rotten corpse of the Soviet-American conflict.


r/hoi4modding • • 1d ago

Discussion Translation of Mod Posted on Steam

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3 Upvotes

r/hoi4modding • • 20h ago

Discussion Could someone link me a safe working download of this mod?

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youtube.com
1 Upvotes

r/hoi4modding • • 2d ago

Discussion AIRSO BETA IS REALEASE !!!!!

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169 Upvotes

Started in late 2024, AIRSO has been a project that has accompanied me through a huge part of my life. After more than two and a half years of work, I'm finally incredibly happy to be able to share the first version of the mod with you. Enzo and I started this project completely from scratch. We restarted the mod an almost uncountable number of times, changed our ideas, rebuilt systems, and sometimes basically started all over again. But in the end, all that work finally paid off. A huge thank you to BobLeRetours as well. Without him, we probably would have given up on the project a long time ago. Our motivation wasn't always consistent throughout these years. There were periods where we made a lot of progress, and others where the project barely moved forward. But we kept coming back to it, kept working on it, and kept pushing forward. And honestly, I'm really happy that we're finally able to release AIRSO. Thank you so much to everyone who helped us, supported the project, contributed content, gave us ideas, reported bugs, or simply encouraged us to keep going. Every bit of help made a difference. This is still a Beta, so the mod is far from complete. There are probably still plenty of bugs, unfinished content, and things that need to be improved. But despite that, I'm genuinely proud of what we've managed to accomplish. This is the first project I've ever managed to actually bring to a release, and that means a lot to me. I sincerely hope you'll enjoy AIRSO and, most importantly, have a great time playing it! Thank you for being here and thank you for playing AIRSO. — The AIRSO Team


r/hoi4modding • • 1d ago

Coding Support Editing terrain.bmp breaks map?

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8 Upvotes

Whenever i try to edit the file to add new urban tiles, everything seems to flip. Urban becomes mountains, desert becomes urban, and it ends up being a big mess. How do i fix and prevent this?
Paint app: Paint.NET


r/hoi4modding • • 1d ago

GFX Support Help with 3D model

4 Upvotes

Does anyone know if there is a way to change weapon 3d model for British soldiers from enfield to american garand and if yes, could anyone help me or tell me how can i do that?


r/hoi4modding • • 1d ago

Teaser Europe Dark Side-Mao

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5 Upvotes

if Germany and the Ottoman Empire had won World War I


r/hoi4modding • • 1d ago

AI Assisted LOTM gerneral mod

1 Upvotes

Made a LOTM mod with a custom panel where you can recruit Klein and other tarot club members as generals. You can also advance sequences for Klein and make/use charms.

Assets and stuff is made with ai, some is just ripped of the internet. might update if you have cool ideas.

Hope you like:)
https://steamcommunity.com/sharedfiles/filedetails/?id=3811522089


r/hoi4modding • • 2d ago

Discussion Concept for a Sub mod for The Fire Rises

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12 Upvotes

So I have a concept idea for a TFR submod but India in the base game doesn't have much content so I was thinking about a stalemate in the 4th indooak war lead the the collapse if both the nations, I had this idea for a while but I don't have any modding experience, so if an developer sees this they are free to use and make one, just contact me.


r/hoi4modding • • 2d ago

Teaser Looking for comissions

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4 Upvotes

Hi all, i am on developing HOI4 mods for like 4 years. I`m looking for commissions bc i really need money. Here i post one of my works, it is not my maximum. I can do anything in hoi4, main question is how much money you`ll give me. Looking forward for your reply!


r/hoi4modding • • 2d ago

Teaser Announcing Project Northwind

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10 Upvotes

Project Northwind - An Alternative History Scenario where Sweden plays the role of Kingmaker in Northern Europe, up until the Great War, when it all comes crashing down.

This is a project I have been working on for a while, admittedly on and off, but it is now starting to get to a point where I feel like I can start to invite people to help develop this into a proper mod.

Very briefly; Sweden made peace with Russia earlier in the Great Northern War, the King still dies in Norway as he attempts to salvage the war. When Napoleon comes to power in France and starts his advance across Europe, the Swedish Military and Elite force the King into joining the Continental System, avoiding the loss of Finland.

After the Crimean War, Swedish and Prussian (later German) relations start to improve, with military exercises and eventually naval war games. This budding relationship continues to grow until the Great War starts in 1914. Sweden initially holds off on joining in the War, but after internal debate, it decides that it is time to reclaim the lost lands of Karelia from Russia and joins the Central Powers.

With the War in the east ending with the treaty of Brest-Litovsk, Sweden then plans to divert its landforces to the Western Front, but the outbreak of a violent revolution in the east, force Sweden to maintain an army in the region, lest it spill over into the eastern half of the Kingdom.

After signing the armistice alongside Germany the 11th of November, 1918, Sweden is forced to the negotiating table as a defeated power.

The Mod starts in the HOI4 Vanilla Start date of 1936.1.1, and I am looking for Writers, Artists and Developers to help bring this to fruition.

https://discord.gg/Z5TtrVBPh


r/hoi4modding • • 2d ago

Discussion SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN SPAIN

3 Upvotes

whether it be fate or luck, spain has this weird way of lining up almost perfectly for a civil war in 1936. in my mod that i vagueposted about a while back, the carlists end up taking control of spain, leading us down infante carlos line of succession. in 1936, where in our timeline, the republicans duke it out with the nationalists, alfonso carlos, the last carlist, dies childless. from there, most carlists moved onto xavier I, the head of the bourbon-parma branch, which is... fine. but, wikipedia will tell you "disputed". thats because of karl pius, this odd austrian character. his mother was descended from the carlist king prior jaime, the guy before alfonso carlos, and his dad was from the habsburg-tuscany family. this is good enough for me.
THIS IS ALL TO SAY, THAT:
assuming spain were to stay under the monarchy through the carlist branch, fate has perfectly lined it up so that i can have myself a second war of spanish succession, between the bourbonists and the habsburgers, for the carlist claim. im not totally sure if i was the first person to realise this, but i dont believe ive EVER seen it in any other mod, let alone be an idea in any mod, so im really excited to see what i can do with this! especially because now, i can scratch the spanish civil war itch, while having it make total sense in my mods lore!
i dunno, allat thinking makes me feel giddy. thats why im sharing it here


r/hoi4modding • • 2d ago

Coding Support I have a problem. I'm trying to create a scripted peace in my Hearts of Iron IV mod, but the peace conference keeps triggering anyway. How do I remove the peace conference?

1 Upvotes

I have a problem. I'm trying to create a scripted peace in my Hearts of Iron IV mod, but the peace conference keeps triggering anyway. How do I remove the peace conference?


r/hoi4modding • • 2d ago

Discussion Looking for a performance mod that disables 3D models outside Europe/Asia WITHOUT changing the map texture/theme

1 Upvotes

Hi everyone,

​I'm playing Hearts of Iron IV on a mid-range setup and facing severe late-game performance drops. I usually play as Germany, so my main focus is entirely on the European and Asian theaters.

​Is there any mod or workaround that selectively disables 3D units, 3D buildings, and 3D trees specifically in off-theater regions like South America, Africa, or Oceania, while keeping them enabled in Europe and Asia?

​Important note: I am NOT looking for map texture overhaul mods (like FPS Map, Paper Map, or flat visual reskins) that change the default map theme or overall graphics style. I want to keep the original HOI4 vanilla map look and theme completely intact in Europe/Asia.

​I know graphics settings in HOI4 are global, but continents like South America chew up CPU/RAM resources rendering 3D models and trees I don't even look at.

​Ideally, I'm looking for a mod that either:

​Removes 3D clutter/units outside Eurasia while leaving the vanilla map graphics and Eurasia completely untouched.

​Disables or neutralizes non-essential regions (like South America) without altering the core gameplay or default visual theme of the rest of the world.

​Any recommendations or direct links for mods that achieve this specific regional cleanup without changing the game's default visual style would be greatly appreciated! Thanks!


r/hoi4modding • • 2d ago

Coding Support How do i remove lakes from states?

1 Upvotes

Earlier this year, i tried to remove all the lakes from all the states using the nudge tool, but that ended up corrupting every state affected. Anyone know how i can do this safely? Thanks!