Mods and modding

General modding guides

Specific mods



  • Current Version: 0.3.2
  • Last Update: November, 2007
  • Popularity: over 10,000 posts
  • Compatibility: HOI2, DD, ARMA

CORE is the Community Open Resource Exchange. CORE aims to make Hearts of Iron 2 a more historically accurate and involving game, through expanded and more detailed tech trees, corresponding units, tech teams and a large number of events, reflecting both historical actions and possibilities. Both Industrial Capacity („IC‟) and resources for the entire game have been revised to better reflect reality in the late 1930s. Other features include reserve divisions instead of militia (a reserve unit is less mobile, and has less heavy weapons - such as artillery. These units form the mainstay of the armies of the minor and semi-industrialized countries), rares scarcity, SS recruitment, 1:1 naval ship representation and negative resource production (representing civilian spoilage of energy and oil). The basic CORE installer includes generic graphics for techs, tech teams, leaders, ministers and models that have been updated to fit the latest release. There are also optional packages to download with an even greater amount of graphics available, such as country-specific model graphics.

Total Realism Project

  • Current Version: 0.9.3
  • Last Update: March, 2008
  • Popularity: over 10,000 posts
  • Compatibility: HOI2, DD, ARMA

The TRP mod has a long history a thriving community, both on the Paradox site on their own website. The primary focus of the mod is to improve historical realism.


  • Current Version: 0.5,2
  • Last Update: June, 2008
  • Popularity: 1,000 - 5,000 posts
  • Compatibility: HOI2, DD, ARMA

This mod begins in October of 1934 and features a completely new technology tree (without historical year), improved AI, new units, events (over 6000 new events), and new countries (for example:Vatican city and League of Nations). The technology tree in particular is very unique, in that it allows players to focus on specialization, and forces choices in research such as choosing the trade-off of having faster armor with weaker guns, or better guns but slower armor. In this sense, every nation is sure to field different units.


  • Current Version: (does not use versioning)
  • Last Update: April, 2007
  • Popularity: 1,000 - 5,000 posts
  • Compatibility: HOI2, DD, ARMA

DAIM stands for "Determined AI Modification" and is a mod that solely focuses on improving the AI. This is accomplished by ensuring the AI researches and builds the most effective units possible, rather than wasting time building units that the game engine/AI is not capable of using effectively. Specific focus was made to improve: Germany, Italy, Japan, Great Britain, Soviet Union, U.S.A. and Nationalist China. DAIM can be adapted to other mods, since it only changes a select few AI files. Further Reading

The World in Flames

  • Current Version: 1.0 Gold Version
  • Last Update: May, 2008
  • Popularity: 1,000 - 5,000 posts
  • Compatibility: HOI2, DD, ARMA

The WiF mod is designed to make Hearts of Iron a more challenging, realistic and historic game with many events (+4000), a new combat system, new AI, new graphics and sounds. Will you surrender to an AI for the first time ?

Stony Road

  • Current Version: 2.08
  • Last Update: July, 2006 (inactive)
  • Popularity: over 10,000 posts
  • Compatibility: HOI2, DD

The Historical Stony Road (HSR) mod is designed to give experienced players a tougher, more accurate and detailed game as Germany from 1936 to 1947. The mod addresses historical accuracy, new events with alternate scenarios, changed combat balancing, a new trading system, new brigades, improved AI, and new graphics.


  • Current Version: F3B
  • Last Update: February, 2006 (inactive)
  • Popularity: less than 1,000 posts
  • Compatibility: HOI2

Starfire is designed for multiplayer, focusing on the 1939 scenario. It improves accuracy and realism, and uses slower paced combat.

Other Historical


A modification to recreate WWI, with new leader pics, events, data and new technology. Further details can be found by clicking the link above.

Modern Day Scenario 2

MDS2 is a modification of Hearts of Iron 2. The mod starts out with the Invasion of Iraq and the War on Terror in March 2003 and lasts through 2019. The storyline emphasize on a conflict between China, Russia, the EU and the US. It is one of the most comprehensive mods for HoI2 that has been released.


WERS (White Eagle, Red Star) is a battle mod for the Hearts of Iron 2 game. The main theme is Polands fight for independence from 1919-1921. Player will be also witness a dramatic fight between White Russians loyal to the Czar and the Red Army. War theatre covers Middle-Eastern Europe.

Cold War mod

A mod that focus on the Cold War era. It spans the 1955-1995 time period and aims to be as historically accurate as possible.

Alternate History and Fantasy

[ ]{#Fallout’s_Doomsday_Forum} Fallout's Doomsday Forum

[ ]{#Fallout’s_Doomsday_Website} Fallout's Doomsday Website

We would like to introduce you to: "Fallout's Doomsday Mod for Hearts of Iron 2 DD:A".

Have you been thinking about reuniting USA as a nation long after the world ended, leading your armies across radiated deserts to fight the mutated monsters and raiders out there? Or maybe you have been dreaming about conquering those weak humans while leading an army of powerful Mutant warriors to victory in their endless wars? Or perhaps you want to control the Enclave, the shadowy survivors of the pre-War US government who fled to their offshore bases before the Bombs fell, using their high tech science and sinister experiments to establish a new world order?

All those paths await you in a new mod that has been created as a tribute for two best computer role playing games ever: Fallout 1 and Fallout 2. Set in a post Apocalyptic world 167 years after the Bomb was dropped, this is complete science fiction conversion to HOI2. Completely new tech tree, units, resources, economy, and nation groups; all with unique graphics. A completely new gaming experience for the best WW2 strategy game ever made: Hearts of Iron 2.

The mod is set in the Wastelands: the radioactive and windswept remnant of what was once North America. Take control of one of the many groups rising to power on top of the ashes and ruins of pre-War civilisation. Build industries and infrastructure, research technologies, manage your resources, conduct diplomacy with other nations, build and manage your military forces to achieve dominance over the Wastelands.

Kaiserreich: Legacy of the Weltkrieg

Kaiserreich is a Global Alternate History Mod for HOI2. It poses the question, what if the Central Powers had won the first world war. The Mod has a Forum and a wiki .


The end of the Great War brought with it the end of the age of monarchies. In Russia, Germany, Austria-Hungary, Turkey, and Serbia, ruling houses were overthrown and new governments installed in their place. But those new governments were not always stable and were themselves subject to opposition, and in some cases rebellion.

How might history have been different if, in the defeated Central Powers, the emperors had returned? Play A.E.I.O.U., a modification of Hearts of Iron 2, and find out. Can you lead Austria to reclaim her lost glory?.

  • Downloadarea Here you find the downloadarea with the newest version of AEIOU (now also playable with Armageddon!

Grand Battle mod

Rather than being a specific mod, this is a collection of Risk like fantasy mods by Yukala. There is also a focus on improved AI. These include Risk Battle mod and Guild Imperium, which is the latest.

Confederate Armageddon

  • Current Version: 2.1
  • Last Update: July, 2008
  • Popularity: Soon to be a published wargame!
  • Compatibility: ARMA

A mod that allows you to play the CSA in the 1936 scenario.

Settling Accounts

A mod based on the Settling Accounts books by Harry Turtledove.

Domination of the Draka

A WWII alternate history mod based on the Draka books by S.M. Stirling.

Fatherland- Alternate history Cold War

A Cold War mod with a twist. What if Hitler won WW2? Doomsday and Armageddon only.

[ ]{#Winter’s_Dawn_-_22nd_Century_Warfare} Winter's Dawn - 22nd Century Warfare

A mod taking place in the future. Conflicts ranging from the early 21st to late 22nd centuries.

Anatolian Wars Mod

Developed by mehmet12 and miihkali, this mod focuses on an alternate reality in which Greece won the Greco-Turkish War of 1922 and then went on to fragment Anatolia. Greece, Pontus, Armenia, Cappadocia, Kurdistan, and Turkey are all playable with new ministers, leaders and skins. Version 1.0 released in December 2007- the next version is said to include more modded nations such as Kalmykia, Jebel Al Druze, Maronite Lebanon, Coptic Egypt, Circassia, Crimean Tatar Republic, and the Kazan and Don Cossack Hosts.

Graphical Mods

[ ]{#DMP_(Design_Mod_Projekt)} DMP (Design Mod Projekt)

A big mod project with a lot of new sprites and graphics for a lot of countries.

  • The DMP board (with a lot of members who work at many other Mods)

Off-Site Modding Guides

[ ]{#Havard’s_HoI_Hacking_Haven} Havard's HoI Hacking Haven

This site was made originally for the first Hearts of Iron, but most of the basics of modding that game carry on into the sequel. This site is almost an essential must-bookmark for any modder, and the tables and examples contained in the site are worth their weight in rare materials.

[ ]{#Baylox’_event_syntax_overview} Baylox' event syntax overview

Overview of all event-triggers and -commands.

How to use mod-dir

Create a subdirectory and place your files inside it (maintaining the exact directory structure of HoI) and then launch the game via HoI2.exe followed by the name of the directory containing your mods. For a more detailed description see the Moddir page.

MP moddir Still Broken

Even with v1.2 the Moddir feature is still broken for multiplayer play. Thus if you try and play a mod in multiplayer it will fail. The only work around is to modify the main game itself. vic:Mods and Modding eu2:Mods and Modding ck:CK Modification and Editing