DLC

钢铁雄心4的DLC界面

可下载内容 (DLC)，是由Paradox Development Studio（PDS）制作的内容，是对钢铁雄心4的扩展或添加内容。它们本质上是模块化的，这意味着玩家可以通过通过启动器勾选是否需要特定的DLC进行游戏。DLC通常随附一个免费补丁更新，该补丁为玩家提供了大多数新的更新内容，以免阻碍游戏的可玩性。大多数DLC均被视为可选购买内容。

多人游戏也从这种兼容性中受益，也就是说，如果主机具有玩家没有的DLC（扩展包和风味包），则其他玩家将享受与主机一样的游戏体验。

注意：有关特定DLC的更多详细信息可以通过单击其图标来获取。

基础游戏

与游戏相关的所有DLC都需要基础游戏。尽管单位包DLC/音乐DLC可以与任何游戏版本一起使用，但扩展包和风味包DLC不能在其发行版本之前使用。

Title and Quick description
重定向 Template:图标 Hearts of Iron IV Released on 2016-06-06. Total strategic war: War is not only won on land, sea and in the air. It’s also achieved in the hearts and minds of men and women. 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. Turn the world into your battlefield: Experience the full WWII timespan in a topographical map complete with seasons, weather and terrain. Snow, mud, storms can be both your strong ally and a ruthless enemy. Negotiate or force your will: Experience the advanced politics and diplomacy systems, form factions, engage in trade for resources and appoint ministers to your party. Intense Online Combat: Battle in both competitive and cooperative multiplayer for up to 32 players. Featuring hotjoin and cross-platform multiplayer. 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.
Hearts of Iron IV: Mobilization Pack Includes the base 重定向 Template:图标 Hearts of Iron IV game and the following expansions: 重定向 Template:分栏

扩展

Expansions change the game considerably; introducing new and improved gameplay mechanics as well as many kinds of flavor and various balance tweaks (included in the accompanying free patch).

Title and Quick description
重定向 Template:图标 Together for Victory Released on 2016-12-15. New national focus trees and events: Focus trees for 重定向 Template:国旗, 重定向 Template:国旗, 重定向 Template:国旗, the 重定向 Template:国旗 (India) and 重定向 Template:国旗. 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. Changes to Lend-Lease: Allows to ask allies to send you your desperately needed equipment. A Spearhead battleplan command: Allowing more control over grand encirclements and punching through enemy lines. Technology sharing: Allows Commonwealth nations to quickly catch up with British assistance.
重定向 Template:图标 Death or Dishonor Released on 2017-06-14. Four New Focus Trees: Experience the war from the difficult perspectives of 重定向 Template:国旗, 重定向 Template:国旗, 重定向 Template:国旗, and 重定向 Template:国旗. Equipment Conversion: Update your arsenal by converting older units - or make use of captured enemy vehicles and gear. New Diplomatic Interactions: License military technology to bring other nations' weapons to the field or sell your advances to the highest bidder. New Puppet Interactions: Fascist countries get new subject levels like Reichskommissariat, with access to licenses, industry and strategic resources. The instated governments are held in an iron grip, making it harder for them to break free. New Music and Art: 3 new thematic musical tracks from composer Andreas Waldetoft, new art content for the four focus nations, and new troop voiceovers.
重定向 Template:图标 Waking the Tiger Released on 2018-03-08. National Focus Trees for China: Guide 重定向 Template:国旗 or the 重定向 Template:国旗 through the war, guided by your own vision of the future. Modified Focus Trees: 重定向 Template:国旗 and 重定向 Template:国旗, two major Axis powers now have alternate history paths, including the chance to depose Hitler or restore democracy to Japan. General Traits and Abilities: Generals’ traits can now unlock powerful Command Power abilities, allowing great flexibility and creativity. Decisions and Missions: Historical decisions and national missions give new places to spend Political Power, from domestic politics to start special projects. And more: Scavenge equipment from the battlefield, use Volunteer Air Corps, as well as new music and art.
重定向 Template:图标 Man the Guns Released on 2019-02-28. Major Alternate Paths: Revive the Old Confederacy as the 重定向 Template:国旗 and provoke a new civil war, or hasten decolonization of the 重定向 Template:国旗. Ship Design: Research new components and refit older vessels to take advantage of new knowledge. Outfit your submarines with snorkels or improved stealth. Admiral Traits and Skills: Tailor and level up your Admirals with new traits and skills. Governments in Exile: Welcome a government in exile to your democracy, boosting their legitimacy in return for more manpower and elite troops fighting to free their homeland. Other National Focuses: New national focuses for The 重定向 Template:国旗 and 重定向 Template:国旗. Naval Mines: Protect your coasts from invasion or assault with anti-ship mines, or clear a path through enemy mines before you make the big push. Shipping route controls: plot new routes for your shipping and navies by marking areas you want to avoid. Naval Treaties: Struggle to keep the peace by following internationally agreed upon rules, or creatively defy the world consensus by exceeding your limits. Amphibious Landing Vehicles: Add power to your beach landing by researching and producing specialized combat vehicles for your marines. New Music: Original music composed specifically for the Man the Guns expansion.
重定向 Template:图标 La Résistance Released on 2020-02-25. New Focus Trees for France: New National Focuses for Free 重定向 Template:国旗 and the 重定向 Template:国旗 Regime, as well as an option for conservatives to restore the old French Monarchy. More in Depth Spanish Campaign: New National Focuses for 重定向 Template:国旗 and 重定向 Template:国旗, as well as an expanded Spanish Civil War that can spiral into a wider conflict.. Portuguese Focuses: Navigate the pressure of the World War, or involve yourself in the Spanish Conflict with the new Focus Tree for 重定向 Template:国旗. Espionage: Use you Intelligence Agency to train spies to specialize in certain types of information warfare and develop passive resistance to enemy espionage, then send them on special operations. Support Resistance: Use your agents to assist allied resistance movements, giving them what they need to damage the enemy. Collaboration Governments: Use your agents to prepare the ground for collaborators to fill the void once you’ve conquered your target. Code Cracking: Decrypt enemy communications to gain short term battlefield advantages. Recon units: Scout planes can provide useful information on nearby areas while armored cars help in detecting and suppressing resistance activities.

Flavor packs

Flavor packs add new events, event pictures and unit models often specific to one nation or group.

Title and Quick description
Poland: United and Ready (A free DLC) Released on 2016-06-06. Focuses on 重定向 Template:国旗 Adds a unique national focus tree. 3D art for infantry and some more well known tanks and planes. 2D art for tanks & planes, complete with flavor names. 2D art for ministers, generals and country leaders. Complete Polish voice acting for military units. Some additional events.

Music packs

Music packs add new music created after the game's release to the game's soundtrack.

Title and Quick description
Pre-Order Pack (Not available for purchase) Released on 2016-06-06. 重定向 Template:分栏
Sabaton Soundtrack Released on 2016-06-06. Composed by Sabaton: Adds 5 World War II themed tracks by Sabaton that play during the game. (can't be used on LP videos due to 3rd party copyright). 重定向 Template:分栏
Sabaton Soundtrack Vol. 2 Released on 2017-01-26. Composed by Sabaton: Adds 10 tracks illustrating moments of World War II with passion and power chords! (can't be used on LP videos due to 3rd party copyright). 重定向 Template:分栏
Radio Pack Released on 2019-06-04. Adds 35 new songs spread across three faction specific radio channels, each with their own unique look and design: Allies Radio Station Axis Radio Radio Comintern
Allied Speeches Pack Released on 2020-06-04. Monumental and inspirational moments from history come alive in your campaign game. Set to activate when certain in-game conditions are met, the Allied Speech Pack brings you closer to the past. 13 total speech excerpts with over 70 minutes of speech taken from the darkest days of the last century, including: 重定向 Template:分栏

Cosmetic packs

Cosmetic packs add graphical enhancements to the game, whether by additional unit models, landmarks or portraits.

Title and Quick description
Colonel Edition Upgrade Pack (Not available for purchase) Released on 2016-06-06. Heavy Cruiser Pack: Adds 7 heavy cruisers available for both Axis and Allies, including Exeter, Prinz Eugen and Mogami. Tank Pack: Adds 40 tanks, ranging from light to super-heavy (8 units for each nation), for: 重定向 Template:分栏
Anniversary Pack (A free DLC) Released on 2017-06-06. 20 new portrait selections for generals and leaders across nations in Africa, Asia, Europe, and South America. 20 new custom division icons. New voiceovers for troops while playing as 重定向 Template:国旗.
Axis Armor Pack Released on 2019-06-04. Axis Armor Units: Adds 53 armor models for 重定向 Template:图标 fascist regimes: 重定向 Template:分栏 Axis Tank Units: Adds 8 tank units to 重定向 Template:国旗, including the King Tiger and the Maus super heavy tank.
Allied Armor Pack Released on 2020-06-04. Allied Armor Units: Adds a number of new armored and tracked vehicles for the Allies and Comintern powers: 重定向 Template:分栏 Allied Tank Units: Adds 32 tanks (8 units for each nation), ranging from light to super-heavy, for: 重定向 Template:分栏

E-books

E-books are books written based on the Hearts of Iron IV game. These, however, do not impact the actual game in any way whatsoever.

Title and Quick description
War Stories (part of Pre-Order Pack) Paradox account Released on 2016-05-16. Written by Aaron Rosenberg: A branching narrative (gamebook) about a young British pilot during the Battle of Britain. Be wise! The decisions you make will influence which skills you learn, your relationships with other characters and even the story’s outcome.
Art of War (Not available for purchase) Released on 2016-06-06. A 23-page book with art from the creation process of Hearts of Iron IV.

File names

List of DLC files in the /Hearts of Iron IV/dlc folder (bold names are expansions):

1. 重定向 Template:折叠