Hearts of Iron

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Hearts of Iron
Developer(s) Paradox Development Studio
Publisher(s) Strategy First
Engine Europa Engine
Platform(s) Microsoft Windows, Mac OS, Mac OS X
Release date(s) November 24, 2002
Genre(s) Grand strategy
Mode(s) Single player

Hearts of Iron is a grand strategy computer game developed by Paradox Development Studio and published by Strategy First, set in the years 1936-1948. In the game players can control any one nation as World War II unfolds. It was released for Windows-compatible PCs in 2002. A Macintosh version was also released by Virtual Programming. The lead game programmer was Johan Andersson.


Hearts of Iron is based on Paradox's successful Europa Universalis game engine, but has many changes:

  • a technology tree divided into 14 sections (infantry/artillery/industry/armoured units/navy/etc.), with dozens of researchable technologies in each section and the ability to customize some units.
  • an economic model based on four natural resources: coal, steel, rubber and oil on which the armed forces and industry depend.
  • Several military and political leaders to choose from.
  • A variety of military units, from colonial militia to intercontinental ballistic missiles.
  • A weather model, affecting movement and combat efficiency of units.

Gameplay revolves around surviving (either before or during) World War II, and the player may cause or witness events different from how they historically occurred. Hearts of Iron is considered an alternate history game.

There are three main alliances in the game, the Allies, the Axis, and the Communist International, that the player can either participate in or stay out of. The game ends when there is only one alliance left standing or on midnight, December 30, 1947, and the winning alliance is determined through a victory point system, giving points to alliances controlling key regions or cities.


The game was banned in the People's Republic of China because the game depicts Tibet, Sinkiang, and Manchuria as independent countries, and Taiwan under Japanese control (historically, Taiwan was under Japanese rule at the time).[1] Paradox Interactive mentions that the game is historically accurate, and that it represents the "rough times" that China endured, as well as the difficulties that the Communist Party of China overcame in order to win the Chinese Civil War.[2]


A sequel, Hearts of Iron II, was created and released in 2005 with several changes in the tech tree and gameplay. Hearts of Iron III was released on August 7, 2009. Hearts of Iron - The Card Game was released as a free-to-play, browser-based collectible card game on 3 October 2011.[3] East vs. West – A Hearts of Iron Game was planned for a release in 2014, but it was cancelled. The next sequel, Hearts of Iron IV, will be released in 2016.


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