Hearts of Iron IV

Hearts of Iron IV
Developer(s)	Paradox Development Studio
Publisher(s)	Paradox Interactive
Director(s)	Dan Lind (2016-2021) Peter 'Arheo' Nicholson (2021-present)
Composer(s)	Andreas Waldetoft Mangalf Sabaton
Series	Hearts of Iron
Engine	Clausewitz Engine
Platform(s)	Microsoft Windows, macOS, Linux
Release	WW: 6 June 2016
Genre(s)	Grand strategy wargame
Mode(s)	Single-player, multiplayer

Hearts of Iron IV is a grand strategy computer wargame developed by Paradox Development Studio and published by Paradox Interactive. It was released worldwide on 6 June 2016.^[1] It is the sequel to 2009's Hearts of Iron III and the fourth main installment in the Hearts of Iron series. Like previous games in the series, Hearts of Iron IV is a grand strategy wargame that focuses on World War II. The player can control any country in the world, starting either in 1936 or 1939. Players have the option of following a nation's historical path, or leading various non-historical paths.

By May 2018, the game had sold a total of one and a half million copies worldwide.^[2][3] As of June 2023, the game has sold over five million copies on Steam alone.^{[not verified in body]} Since its release, Paradox has released large amounts of downloadable content for Hearts of Iron IV.^[4]

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Gameplay

Hearts of Iron IV is a grand strategy wargame that revolves around World War II. The player may play as any nation in the world in the 1936 or 1939 start dates in single-player or multiplayer, although the game is not designed to go beyond 1948. A nation's military is divided between ground forces, naval forces, and aerial forces. For the ground forces, the player may train, customize, and command divisions consisting of various types of infantry, tanks, and other units. These divisions require equipment and manpower to fight properly. The navy and air force also require men and equipment, including the actual warships and warplanes that are used in combat. Equipment is produced by military factories, while ships are built by dockyards. These military factories and dockyards are, in turn, constructed using civilian factories, which also construct a variety of other buildings, produce consumer goods for the civilian population, and oversee commerce with other nations. Most nations are initially forced to devote a significant number of their civilian factories to producing consumer goods, but as the nation becomes increasingly mobilized, more factories will be freed up for other purposes. Mobilization is represented as a "policy" that the player may adjust with the proper amount of political power, an abstract "resource" that is also used to appoint new ministers and change other facets of the nation's government. In addition to mobilization, there are other policies, including the nation's stance on conscription and commerce.^[5]

Land in Hearts of Iron IV is divided into tiny regions known as provinces (also called tiles), which are grouped to form states. Each state has a certain amount of shared and state building slots, both of which affect the whole state, while provinces have province building slots that only impact the individual province. Similarly, major seas and oceans (for warships) and the sky (for warplanes) are divided into different zones known as strategic regions. Sea regions and provinces each have a type of terrain and weather assigned to them that determines how well different types of units will perform in combat there. Air regions do not have terrain types but still have weather. Divisions are deployed in provinces and can capture enemy provinces and engage in combat. How well divisions perform in combat depends on various factors, such as the quality of their equipment, the weather, the type of terrain, the skill and traits of the general commanding the divisions, aerial combat in the region, supply lines, and supporting units. Technologies can be researched to improve equipment. Military doctrines can be upgraded by using army XP, among other things, which often means that a more technologically advanced nation will have an edge in combat. If a division (or a group of divisions) successfully overwhelms an enemy province, they may occupy it. Some provinces may have victory points, which can push a nation closer towards capitulation if occupied. Occupying key provinces within a state allows the occupying power to access the enemy's factories and natural resources in that state. Resistance to occupation within a state can hamper the occupying power's control over it. Late in the game, nations may develop nuclear bombs if they have the proper technology, which can be used to devastate enemy provinces and states.^[6]

Hearts of Iron IV also attempts to recreate the complex diplomatic relationships of the day. Nations may undertake a variety of diplomatic actions; they may sign non-aggression pacts, guarantee the independence of other nations, and offer or request military access, amongst other things. Another key feature of diplomacy is the ability to create a faction or invite other nations to an existing one. Factions represent the main alliances of the era, like the Axis and Allies (for gameplay purposes, real-world factions like the Axis and Allies are split into numerous smaller factions, like the Comintern, the Chinese United Front, and the Greater East Asian Co-Prosperity Sphere). Faction members may assist each other in wars, making faction members precious assets. Some more clandestine diplomatic actions are also available. For example, the player may justify war against other nations, spread their ideology abroad, or stage a coup. Countries in the game may be democratic, communist, fascist, or non-aligned. Each of the four ideologies has advantages and disadvantages; for example, fascist nations can go to war with other countries easily, but other nations are not as willing to trade with them as they are with democratic countries. If a nation's ideology is non-aligned, then it can be several things. For an example, if the German Reich loses a civil war, a monarchist party is created, which is non-aligned. If a different ideology becomes too popular in a country, a referendum may be held that will peacefully convert the nation to the most popular ideology. Otherwise, ideologies may come to power violently through coups, civil wars, or forced subjugation by a foreign power.^[7]

This diplomacy is further expanded through the addition of espionage in the expansion La Résistance, which extends gameplay in the management of occupied territories which is done differently according to player choices and ideology. Furthermore, the operation of spy networks allows nations to steal technology, gather information on an opponent's military, and engage in other espionage efforts.^[8]

While Hearts of Iron IV does feature some scripted events, the game features a "national focus" system that makes fixed events less necessary than in previous installments in the series. Each country in the game has a "focus tree" with various "national focuses" that grant certain effects or trigger events. For example, for the Anschluss to occur, Germany must first complete the focus that is related to it. Other focuses can grant special bonuses, like faster research times for certain technologies or extra factories. While some bonuses (like extra factories) are very tangible, others (like improvements to morale) are more abstract. These abstract bonuses are represented by "national spirits" that can be temporary or permanent. Not all national spirits are granted by focuses, and not all spirits are entirely beneficial. Focuses are completed over time; only one focus may be worked on at once, and working on one consumes some political power. Initially, only a handful of key nations, like Nazi Germany, the United Kingdom, the Soviet Union, and the United States, had unique focus trees; all other nations shared a generic one. Subsequent updates and DLCs have added focus trees to other nations as well.^[9]

Hearts of Iron IV also introduces the concept of "world tension", an abstract representation of how close the world is to global war, on a scale from 0 to 100. Aggressive actions by any nation can increase world tension, while peaceful actions can decrease it. Depending on the circumstances of a nation, like their ideology, a certain level of world tension may be necessary to perform certain actions, like justifying war against another country.^[10]

Development

Hearts of Iron IV was announced in 2014 and was originally slated for a late 2015 release.^[11] At E3 2015, creative director Johan Andersson confirmed that the game would be pushed back from its original release window, with the new release date being scheduled for the first quarter of 2016. This was an attempt to resolve several issues encountered with the game.^[12] In March 2016, it was announced that the game, built with the Clausewitz Engine, would be released on 6 June 2016, which was the 72nd anniversary of the Normandy landings.^[1]

Downloadable content (DLC)

DLC timeline

DLC included with the base game in yellow

2016	Together for Victory
2017	Death or Dishonor
2018	Waking the Tiger
2019	Man the Guns
2020	La Résistance
	Battle for the Bosporus
2021	No Step Back
2022	By Blood Alone
2023	Arms Against Tyranny
2024	Trial of Allegiance
	Götterdämmerung
2025	Graveyard of Empires

Name	Accompanying patch	Type	Release date	Description
Together for Victory[a][13]	1.3 "Torch"	Country Pack	15 December 2016	Together for Victory is a country pack that adds content to multiple nations within the British Empire: Canada, Australia, New Zealand, South Africa, and the British Raj. It also expands the gameplay mechanics between puppet states and their masters, with a special autonomy system that determines a subject nation's degree of independence. Features like an expanded Lend-Lease system and the sharing of technology are also added.[14] The country pack was later integrated into the base game.
Death or Dishonor[a][15]	1.4 "Oak"	Country Pack	14 June 2017	Death or Dishonor is a country pack that adds content to several minor powers in Central Europe and the Balkans, which include Yugoslavia, Romania, Czechoslovakia, and Hungary, while also featuring the ability to license military equipment to other countries.[16] If Together for Victory is not owned, the expansion also adds limited puppet levels to the game. Following the release of the 1.10 "Collie" patch, content for Yugoslavia and Romania was reworked.[17] The country pack was later integrated into the base game.
Waking the Tiger[a][18]	1.5 "Cornflakes"	Expansion	8 March 2018	Waking the Tiger is an expansion that fleshes out the Second Sino-Japanese War with new content for Japanese-controlled Manchukuo, as well as Nationalist and Communist China, and a shared focus tree for the Chinese warlords of Guangxi, Yunnan, Ma, Shanxi, and Sinkiang. The expansion also adds new opportunities for alternate history within the focus trees of Germany and Japan, which were expanded, and several new formable nations were added. In addition, special projects and policies can be enacted with unique decisions, and several changes to the management of generals are present in the expansion.[19] The expansion was later integrated into the base game.
Man the Guns[20]	1.6 "Ironclad"	Expansion	28 February 2019	Man the Guns is an expansion that improves the naval combat aspect of the game with the inclusion of a ship designer, although numerous other changes and new features are also present in the expansion, such as adding content for the Netherlands and Mexico and also including new alternate history paths for the United States and the United Kingdom. The expansion also adds fuel as a resource separate from oil, and government-in-exile mechanics.[21]
La Résistance[8]	1.9 "Husky"	Expansion	25 February 2020	La Résistance is an expansion that adds espionage and occupation mechanics. Intelligence is greatly expanded, while occupation and resistance are completely reworked. The expansion also includes a revamped focus tree for France (including Free and Vichy France), a new one for Portugal, and two focus trees for the different sides of the Spanish Civil War, one for the Nationalists and one for the Republicans. It also allows the civil war to spiral into a much bigger conflict.[8]
Battle for the Bosporus[22]	1.10[b] "Collie"	Country Pack	15 October 2020	Battle for the Bosporus is a country pack that adds unique focus trees for Greece,[24] Bulgaria,[25] and Turkey.[26]
No Step Back[27]	1.11 "Barbarossa"	Expansion	23 November 2021[28]	No Step Back is an expansion that adds railroads, armored trains, railway guns, and a tank designer, with the possibility of customising chassis, weapons, and engines. It also introduces the general staff and adds unique focus trees to the Baltic countries, and a reworked one for the Soviet Union. An additional free update reworks the Polish focus tree.[27]
By Blood Alone[29]	1.12 "Avalanche"	Expansion	27 September 2022	By Blood Alone is an expansion that adds new peace conference options, a plane designer, unit medals, and embargo interaction. It also includes a reworked national focus tree for Italy, as well as new national focus trees for both Switzerland and Ethiopia.[30]
Arms Against Tyranny[31]	1.13 "Stella Polaris"	Expansion	10 October 2023	Arms Against Tyranny is an expansion that adds unique focus trees for the Nordic countries, customizable special forces units and a system for selling equipment between countries.[32]
Trial of Allegiance[33]	1.14 "Bolivar"	Country Pack	7 March 2024	Trial of Allegiance is a country pack that adds unique focus trees for Argentina, Brazil, Chile, Paraguay, and Uruguay.[34]
Götterdämmerung[35]	1.15 "Kaiser"	Expansion	14 November 2024	Götterdämmerung (German for Twilight of the Gods) is an expansion that centers on special projects and military raids. It also features updated focus trees for Germany and Hungary while adding new ones for Austria, Belgium, and the Congo.[36]
Graveyard of Empires[37]	1.16	Country Pack	Q1 2025	Graveyard of Empires is an upcoming country pack that will add unique focus trees for India, Iran, Iraq, and Afghanistan.[38]

On 4 April 2024, Together for Victory, Death or Dishonor, and Waking the Tiger were integrated into the base game and are no longer sold separately or considered DLC.^[39]

Modding

Hearts of Iron IV was developed to be more open-ended than previous games in the series. Partially as a result of this, the game can be more readily modded than its predecessors.^[40] According to game director Dan Lind, 64% of Hearts of Iron IV players use mods.^[41]

Many mods do not change the gameplay experience drastically, and as such have become mainstays of the community, for example, 'Player-Led Peace Conferences', which gives the player more control over the outcome of postwar peace conferences. Other mods encompass total conversions that change the game significantly, usually through the use of alternate history scenarios, different starting scenarios, or adding content to the game. Some mods have been successful enough to attract attention from the media, such as the following:

• Kaiserreich: Legacy of the Weltkrieg, a mod set in a world where the Central Powers won World War I. Kaiserreich is considered the largest and most in-depth Hearts of Iron IV mod by community members.^[42][43][44] The mod was first released into Steam Community on December 1, 2016.^[45]
• Old World Blues, a mod set in the Fallout universe. This mod has been praised for its effective portrayal of the Fallout series within a grand strategy setting.^[46][47] The Legacy version of this mod was first released into Steam Community on February 17, 2018.
• The New Order: Last Days of Europe, a mod set in an alternate 1962 after the Axis Powers won World War II, where there is a three-way Cold War between America, Germany, and Japan. The mod has received praise for its rich storytelling and esoteric atmosphere.^[48] The mod was first released into Steam Community on March 27, 2021.^[49]

Some other mods have also attracted controversy, such as Millennium Dawn, that allows players to take control of any country in the modern day, including the Islamic State's caliphate, and Deus Vult, a now-removed mod that allowed players to take control of the Knights Templar and commit various atrocities.^[50]

Reception

Reception

Aggregate score

Aggregator	Score
Metacritic	83/100[51]

Review scores

Publication	Score
GameSpot	8/10[52]
IGN	9/10[53]
PC Gamer (US)	88/100[54]

Hearts of Iron IV was a commercial success.^[2] It sold more than 200,000 units within two weeks of its launch, which made it the fastest-selling historically themed Paradox title by that time, ahead of Crusader Kings II and Europa Universalis IV.^[55] The game's sales surpassed 500,000 units in February 2017,^[56] and 1 million units in May 2018. It was the first Hearts of Iron game to reach the million mark, and the third Paradox title after, Crusader Kings II and Europa Universalis IV to do so.^[2] The game received "generally favorable reviews" from critics, according to the review aggregator Metacritic.^[51]

GameSpot gave the game a positive review, writing that "Hearts of Iron IV embodies the hard truths about all-consuming war and the international politics that guide it." It argued that the tutorial was the only weak point, and that "for the dedicated, Hearts of Iron IV could end up being the best grand strategy game in some time."^[52]

It was also reviewed in Kotaku, with the reviewer writing it was "overwhelming in both its depth and, more importantly, its complexity" and arguing that some players unfamiliar with the franchise might find the game interface too complex to navigate easily.^[57]

IGN wrote a positive review, describing it as "an incredibly complex World War II simulation that will require potentially hundreds of hours to master, both in-game and poring over wiki articles that read like an economics textbook", but adding that "the payoff is brilliant for those willing to put in the time to learn". The review praised the layout, writing "thanks to an unusually striking look and clean, easily navigable interface, the biggest challenges Hearts of Iron 4 presents us with are the good kind: strategic planning, division composition, and fine-tuning economic and political policies". IGN went on to conclude that Hearts of Iron IV "is a strong contender for the title of the ultimate armchair-general game. The biggest problems I can point to are almost all performance-related, putting a slow, frustrating finale on what is otherwise an ingeniously detailed strategic stimulation of just about every aspect of 20th-century global warfare".^[53]

A review in PC Gamer described it as a "unique, beautiful, thrilling wargame", specifically praising its frontline system and production mechanics, but also criticising the ideology system for being too bland, and finding that combat was somewhat unintuitive, writing "while I found several flaws when I stood close to the tapestry, it's important to remember that Hearts of Iron 4 exists to encompass the whole sweep of the war".^[54]

Polygon praised the openness of the game, writing that "Hearts of Iron 4 goes a step further, allowing players to take control of nearly every single nation-state in the world during the same period. If you want to play as Eleazar López Contreras, a Venezuelan fascist with two army divisions and 12 fighter planes to his name, you can give it a go".^[58]

In 2022, six years after the game's release and shortly after the By Blood Alone expansion, Hearts of Iron IV hit a concurrent player record of about 70,000,^[59] owing to a week-long deal that temporarily made the game free-to-play. The year prior, the game had reached a record of 68,000.^[60]

See also

• List of grand strategy video games
• List of World War II video games
• List of Paradox Interactive games

Notes

1. Part of base game since April 4, 2024
2. Patch 1.10, aka "Collie", was released only to beta testers. It was superseded by Patch 1.10.1, which coincided with the release of Battle for the Bosporus.^[23]

References

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External links

• Official website