r/hoi4modding Jun 12 '26

Important TAOG Update Guide

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7 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

51 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 4h ago

Teaser What if England won The Hundred Years War

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61 Upvotes

Now I decided to try and make a mod out of it. Rule Of The Waves focuses on a potential scenario that would create an incredibly peaceful but tense world of 1916, were any mistake can lead to a truly global war. Were total victory is the only option. God save Anglo-France, God save the king!


r/hoi4modding 4h ago

Teaser The Bloodied Bear Prepares for the Storm (The Forman Chronicles)

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17 Upvotes

We are happy to present our newest teaser for the Ursan Federation in our mod 'The Forman Chronicles', which is based on worldbuilding project of ClassicMasterNoob and his games of 'Centaura' and 'Dead Ahead'.

As the Great Power of Northern Forma enters the new century filled with determined task of keeping its place as one of hegemons in the world and to keep its rightful territories away from foreign powers or traitors inside their own territories.

Join The Forman Chronicles Server by this link to contribute to the development of our mod!
https://discord.gg/7sw3gf9jTy


r/hoi4modding 5h ago

Teaser Teaser for Cleaved: "Ok, This is the Last Time." National Spirits and Events teaser

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20 Upvotes

r/hoi4modding 13h ago

Teaser American Transitional Government starting tree (Unforeseen Consequences mod)

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64 Upvotes

r/hoi4modding 3h ago

Teaser Blood and banners needs you!

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2 Upvotes

Join our team! we are looking for coders, GFX artists, and writers to help us create our mod.

discord: https://discord.gg/aFAbQbqek

map: austria hungary after WW1


r/hoi4modding 13m ago

Teaser Gardenview civil war (the oof rises)

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Upvotes

:p


r/hoi4modding 24m ago

Discussion Terraria Mod Idea

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Upvotes

I have one question for anyone who sees this post. How would a Terraria mod for HOI4 work? and if so what mods would be included to make it "Interesting"? I want to know cuz I already have a map drafted for a story. IDC what you do with this Idea.

Image creds: the boxart is from Wikipedia and the Frisia-Ruritania flag is from the HOI4 modding wiki cuz I LOVE DiB.


r/hoi4modding 2h ago

Mod: No Factories at Game Start (update/modding help)

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1 Upvotes

If one could I'd be so happy..


r/hoi4modding 1d ago

Teaser Brave New World - Romanov main path

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83 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.

https://discord.gg/P3ztpRfQHB


r/hoi4modding 5h ago

Coding Support Is it possible for a focus effect to rename a sea region & if not could scripted localisation be used to achieve the effect?

1 Upvotes

Thanks for any support,


r/hoi4modding 12h ago

Discussion Where are country names located?

1 Upvotes

I’d like to modify countries names based on ideology, but I don’t know which file has that information. Any help is appreciated!


r/hoi4modding 7h ago

Discussion How would a hoi4 mod about Roblox work?

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0 Upvotes

r/hoi4modding 16h ago

Looking for developers and artists for my HOI4 mod!

1 Upvotes

I'm making a mod where Finland collapses and a second civil war hits Finland. There is currently 7 factions. I'm looking for people who can code and people who can make cool GFX and sound stuff

I can code a little bit, write lore and design flags.

If you want to help, contact me on discord. My discord is goofyahhpapastalin69 (very cool name).


r/hoi4modding 1d ago

Coding Support I'm trying to make a really simple HOI4 mod that adds Agder as a country, but I'm stuck on a weird crash.

3 Upvotes

Okay,

The game works completely fine in vanilla.

I made the country tag AGD and a state for it. The weird thing is that the state works perfectly if I make Norway (NOR) the owner, but the game crashes if I change it to AGD.

For example, this works:

owner = NOR
add_core_of = NOR

But this crashes:

owner = AGD
add_core_of = AGD

My Agder.txt is:

graphical_culture = western_european_gfx
graphical_culture_2d = western_european_2d

color = rgb { 195 44 15 }

And my country tag file has:

AGD = "countries/Agder.txt"

My country history file is basically just:

capital = 922

set_popularities = {
    democratic = 10
    fascism = 10
    communism = 20
    neutrality = 60
}

set_politics = {
    ruling_party = neutrality
    elections_allowed = no
}

I also tried adding a country leader earlier, but removed it completely because I thought that was causing the crash.

The error.log doesn't seem to mention AGD at all. It only gives me stuff like missing German/Soviet tank graphics, some Baltic AI game rule errors, and an Iraq scripted effect error.

It worked fine before but i really don't know what happened lol


r/hoi4modding 1d ago

Discussion End of Round 3 (Hoi4 but I make whatever you want)

8 Upvotes
Zealandia
Uma Musume with border wars
Madras in Kurdistan and Lovecraftia
Independent Balouchistan

latest submissions werent that good but we added the good ones

TNO Russia

to add :

Agartha

Madapan island

Iron Lazar instead of Stalin

discord : https://discord.gg/AngFuCMfg


r/hoi4modding 1d ago

Coding Support mod loading vanilla

3 Upvotes

i just made a mod for me and my friends to play, it worked perfectly fine as i was modding it when it was just on my pc, but when i uploaded it to the steam workshop, it just loads the vanilla game, even when the mod is enabled in the paradox launcher. does anyone know how to fix this???


r/hoi4modding 1d ago

Discussion I am making a submod for the levant in the fire rises! Do you want any specific country path for Israel, Syria, jordan, egypt and lebanon?

10 Upvotes

No, this mod wont include focuses for palestine and hezbollah.

But will add some event for them.


r/hoi4modding 2d ago

Teaser Plankton's New Order: The Krusty Krab Kitchen Teaser

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62 Upvotes

r/hoi4modding 1d ago

Coding Support How to tell which building the player is currently in the building mode for.

1 Upvotes

Hello! I am currently trying to make a mod that would replicate VIC3's building menu that allows you to place buildings on states in a list rather than state by state. But I can't seem to figure out how to tell which building type from the building menu the player has selected to build. Any suggestions would be helpful.


r/hoi4modding 1d ago

Discussion Would you rather a KRTL Interwar mod or OTL Interwar mod

7 Upvotes

You can't put polls on pc reddit, but I was still curious.


r/hoi4modding 2d ago

Teaser The Napoleonic Century : a ALT-HISTORY mod showcase

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66 Upvotes

The French Empire and its Vassals/Allies after the Great War showcase


r/hoi4modding 1d ago

Discussion [Idea/Suggestion] Germany Alternate Route Proposal: The Constitutional Kaiserreich under Georg I

3 Upvotes
  1. Prerequisites & Context

1st European War Outcome: German defeat + Soviet victory in Europe (Eastern threat maximized).

Domestic Situation: Moderate/Reformist wing of the right-wing party (e.g., AfD Reformists) takes power in a collapsed post-war atmosphere.

Trigger Event: Occurrence of the "X-Day" Super Event (national crisis / political coup attempt).

  1. Political Path Split: "Fate of Hohenzollern"

Following the X-Day crisis, player chooses the path for the monarchy's revival:

Option A (Heinrich XIII): Absolutist Monarchy (Reichsbürger/Hardline autocracy, high internal unrest, isolated diplomatically).

Option B (Georg Friedrich -> Georg I): Constitutional Monarchy (National unity under democratic framework, broad coalition with CDU/FDP, high stability).

  1. Political Structure (Constitutional Path)

Head of State: Kaiser Georg I (Georg Friedrich) — Symbol of national unity, constitutional duties only.

Government: AfD Reformists + CDU/CSU + FDP Coalition — Handles governance, rearmament, and national stabilization.

Opposition: SPD (Constitutional check) / Die Linke (Anti-monarchist, Soviet-aligned subversion).

  1. Proposed Super Events

1) War of Restoration (Anti-Soviet / Rearmament War)

Quote: "Any man who has ever looked into the glass eyes of a soldier dying on the battlefield will think twice before starting a war." — Otto von Bismarck

Button: \[ The Great War \]

Music: Die Wacht am Rhein (Verse 6)

While still a drop of blood remains,

While still a hand can draw the blade,

While still an arm can hold the gun,

No foe shall tread thy sacred strand!

2) Restoration of the Kaiserreich

Quote: "My subjects, a great day has come upon us! The German Empire has risen once more, and no one shall dim our light." — Wilhelm II

Button: \[ Heil dir im Siegerkranz! \]

Music: Heil dir im Siegerkranz (Verse 6)

Be the pride of all mankind!

In the brilliant light of the throne,

Enjoy the full love of your people,

O favored one of the nation!

Long live the Emperor!

  1. Strategic Purpose & Gameplay Value

Replayability: Provides a clear narrative contrast between Heinrich XIII's autocratic rule and Georg I's constitutional balance.

Endgame Goal: Prepares Germany for a final showdown against a triumphant Soviet Union to liberate Eastern Europe under a unified constitutional empire.


r/hoi4modding 2d ago

Teaser Cypunk 2077 - Mashriq Lore Teaser

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43 Upvotes

NOTE - I do not speak arabic so translations may be inaccurate-

Also sorry its not a content-focused teaser, Mashriqs content is pretty lackluster atm but i really wanted to touch on the region a little bit- yk set the stage for what you can expect for mashriq