Mod «World War Zero» for Hearts of Iron 4 (v1.12.4)

World War Zero

October, 2063. An unidentified object strikes Earth's North Pole. The impact results in the greatest natural disaster humanity had yet known. The following period of planetary chaos would come to be called the Deluge.
It is now January 1st, 2101. Humanity survived the Deluge, but the face of the planet was forever changed. Massive flooding caused coastlines everywhere to retreat inland, many old nations crumbled in the face of the disaster, while many survived. It has been two decades since the so-called Deluge-era ended, with humanity being able to continue its regular existence. But winds of change never cease blowing, and humanity will soon face its final challenge, a conflict to decide the fate of the planet. This final war would be called...

World War Zero

World War Zero is an overhaul mod for Hearts of Iron IV. Taking place in the 22nd century, the mod features a familiar-yet-foreign world, filled with locations and nations both old and new. WWZ is largely a gameplay-focused mod, created by a tiny team of (4) modders, and while the mod has now been released, development will not be stopping any time soon.


As an overhaul mod, WWZ has plenty of features to explore:

  • An overhauled world map, a flooded Earth
  • Over a hundred new nations, complete with custom starting leaders
  • Brand new and (far as I know) unique technology tree
  • Full unique content for the USNA and Indonesia
  • Regional focus trees for Europe, Russia and Africa
  • Regional unification for Europe, Russia, Africa, Mexico, Central Asia, South America and the Western Hemisphere (USNA)
  • New laws, including unique laws for select nations
  • The National Characteristics system, giving you modifiers that stay with you until the end of the game
  • High replayability as a result of the randomization system, which randomizes elements such as factories, militaries and resources for each new campaign
  • And much more!
  • "Enact Policy" decisions can now be fired more than once, as intended
  • USNA air force mission fixed and improved, you can now either make 800 CAS or 400 Tactical Bombers
  • Added a basic CAS template for everyone
  • Unique sites now work as intended, giving their effect to state controllers instead of state owners
  • Russian regional focus tree air equipment problem fixed
  • Disabled all non-jet or rocket engines on the aircraft designer, disabled all defensive turrets as well
  • Some loc fixes, including an attempt to solving the liberalism problem with Turkey

Version 16.09.22 for Hearts of Iron 4 (v1.11.13)

  • Russian warlords will avoid diplomacy with each other
  • Russian warlords now unlock various cosmetic tags (in most cases) when they increase in status. Flags for said cosmetics still underway
  • Tsarina Aleksandra's personality trait "Rightful Heir" has its loc fixed
  • Modified some post-unification expansion content for Russia, you should now always get either a core or a claim when appropriate
  • Pre-unification content of Russia now gets locked away post-unification, preventing some exploits
  • Added decisions for major countries to send military aid to Canada if the war continues for long enough
  • Added decision for Finland to send military aid for Karelia if world tension is high enough
  • Finland, Sweden and Norway start the game with many shared treaties and opinion buffs now
  • Trade laws now increase the amount of intelligence "leaked" to foreign countries
  • Added world tension requirements to ideologies for sending lend lease/guaranteeing a nation
  • Improved the focus title plate graphic assets to make it clearer which focuses are available/unavailable
  • Added a number of claims/cores across the world for nations with rightful clay outside their borders (for instance France now has a core on the island of Brittany)
  • Added missing gfx for an EuroFed national spirit
  • Ensured that in the case that an EuroFed puppet gets independence, they lose their EuroFed National Characteristics, which are replaced with a new set of three NC's
  • EuroFed puppet AI should now rush the post-Brussels Conference focuses more effectively
  • EuroFed AI will now act smarter during the Brussels Conference, meaning the AI now has an actual chance (roughly 50% atm) of succeeding in the conference
  • The randomization scripts for global infrastructure and resource facilities has been tweaked, players should find the world with higher average infrastructure, and greater amounts of resources available domestically and on the market
  • Added new terrain pictures
  • Other minor changes


Version 05.09.22 for Hearts of Iron 4 (v1.11.13)


  • Various improvements across the board based on feedback
  • The "Pacify Canada" mission now requires 50% or more compliance and 10% or less resistance in each state to complete. Additionally, defeating the Canadian revolt grants 10% compliance in all Canadian states.
  • The Military Reform mission has been reworked slightly. If you fail a mission, the penalties will be applies, and the mission will restart. Additionally, the related National Spirit will incrementally lower its debuffs as you complete mission, finally disappearing when reform is completed.
  • Naval reform mission should now work correctly.
  • In the event of USNA collapse, Mexican/South American nations should now get their freedom as intended.
  • Slightly increased USNA beginning war support
  • Added event to inform player when they reach the end of current content


  • Numerous improvements to the overall experience
  • Added missing loc and tweaked existing loc
  • Globalist path has been nerfed
  • Removing the Anti-Indonesian Resistance mechanic made slightly easier


  • New loading screen, made with Midjourney AI
  • Fixed oversight where nations could not declare war on nations of the same ideology
  • When declaring independence from the Federation, European nations lose their EF-related National Characteristics, and receive a new random set
  • Problems with nuke and war justification events should be fixed
  • Renamed Seinäjoki to Seinämeri
  • Renamed Dukedoms and Principalities in Russia to correct forms
  • Clarified European Federation coring decision unlock tooltip
  • Event picture to event when a commander is wounded has been replaced
  • Resource buildings have been made cheaper, from 15000 IC to 10000 IC (Initial cost)
  • Economic and manpower laws have been tweaked, nations should have a notably smaller manpower pool now, will continue to monitor balance
  • Fixed incorrect opinion modifier relating to Brussels Conference


Version 02.09.22 for Hearts of Iron 4 (v1.11.x)


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Hey What Is The timezones?