Victory is at your fingertips!

Take command of any nation in World War 2

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Try HOI 4 for free between 25 Feb - 1 March and buy it for 60% off on Steam, Paradox Plaza and Microsoft.

Main features

From the heart of the battlefield to the command center, you will guide your nation to glory and wage war, negotiate or invade.

Give your nation a unique edge

Experience the flexible technology system, where all major powers get their own unique identity. Develop detailed historic tanks and planes through research and army experience.

Authentic real-time war simulation

Let the greatest commanders of WW2 fight your war with the tools of the time; tanks, planes, ships, guns and newly discovered weapons of mass destruction.

Assume control of any nation

Choose from the greatest powers striving for victory, or the small nations trying to weather the storm. Form factions, engage in trade for resources and appoint ministers to your party.

Explore Alternate Histories

Lead France into the arms of the Bolsheviks, unite the British Empire under a reinvigorated crown, or topple Hitler from power. Pursue alternate timelines on your own, or use the game rules to set the path you wish AI nations to follow.

Free Trial

Try HOI 4 for free between 25 Feb - 1 March

HOI IV

Choose your edition

You hold the power to tip the very balance of WWII. It is time to show your ability as the greatest military leader in the world.

  • Os Compatibility
  • Windows
  • Linux
  • Apple
  • Platforms
  • Paradox Plaza
  • Steam
  • Windows

cadet_edition badge Cadet edition

  • Base Game
  • Poland: United and Ready
  • Forum Avatar
  • Wallpaper

colonel_edition badge Colonel edition

  • Base Game
  • Poland: United and Ready
  • Forum Avatar
  • Wallpaper
  • Heavy Cruiser Pack (Cosmetic)
  • Soviet Tank Pack (Cosmetic)
  • US Tank Pack (Cosmetic)
  • British Tank Pack (Cosmetic)
  • German Tank Pack (Cosmetic)
  • Colonel Forum Icon

Expansions sets

Discover More

HOI IV

Expansion: La Resistance

Secrets and Sabotage Take Center Stage in La Résistance

  • New French Focus Trees: Restore the Monarchy or guide Vichy France.

  • New Spanish Focus Trees: Separate National Focuses for Republican and Nationalis Spain.

  • Portuguese Focuses: Navigate the pressure of the World War, or involve yourself in the Spanish Conflict.

  • Espionage: Recruit spies for Operations behind enemy lines, discovering their secrets and disrupting their plans.

  • Support Resistance: Use your agents to assist rebels in allied occupied territories.

  • Collaboration Governments: Use your agents to set the stage for your invasion, preparing locals to manage conquered nations on your behalf.

  • Code Cracking: Decrypt enemy codes to gain temporary advantages on the battlefield.

HOI IV

Expansion: Man the guns

From the convoy attacks in the Battle of the Atlantic to the fierce carrier battles on the Pacific front, the Second World War saw naval innovation in both tactics and technology.

  • More active democratic nations, with new alternate history paths and greater options in peacetime.

  • Design new warships to match the challenges of naval warfare in all conditions.

  • Sign naval treaties to limit your rivals, or defy international order on your own.

  • Navigate minefields and build new landing craft in a reworking of amphibious war.

  • Welcome governments in exile, using their expertise and veteran leadership to continue the war.

HOI IV

Expansion: Waking the Tiger

Years before Europe went to war, Japan’s imperial ambitions targeted the divided Chinese Republic.

  • Guide the Chinese Republic or Communist China through the war, guided by your own vision of the future.

  • Two major Axis powers now have alternate history paths, including the chance to depose Hitler or restore democracy to Japan.

  • Put multiple armies under the direction of a field marshal to coordinate large movements of army groups, using the traits of your generals to take advantage of their unique skills.

  • Spend your political power on national decisions and missions to strengthen the war effort.

HOI IV

Expansion: Death or dishonor

Death or Dishonor is a new Country Pack for Hearts of Iron IV.

  • Experience the war from the difficult perspectives of Hungary, Romania, Czechoslovakia, and Yugoslavia.

  • Update your arsenal by converting older units -- or make use of captured enemy vehicles and gear.

  • License military technology to bring other nations’ weapons to the field or sell your advances to the highest bidder.

  • New subject relationships for Fascist states allow the dominant power to gather an underling\'s resources and share technology and unit designs.

  • 3 new thematic musical tracks from composer Andreas Waldetoft, new art content for the four focus nations, and new troop voiceovers.

HOI IV

Expansion: Together for Victory

History forged the ties. Empire made them tighter. Can war tear them apart?

  • New national focus trees and events for Canada, Australia, New Zealand, The Raj (India) and South Africa

  • Alternate historical path for each of the Dominions, with options to stay loyal to Great Britain, or forge a new, more independent destiny

  • New autonomy system giving subject states degrees of independence from a foreign master

  • A Spearhead battleplan command allowing more control over grand encirclements and punching through enemy lines

  • Technology sharing will allow Commonwealth nations to quickly catch up with British assistance