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
钢铁雄心4（Hearts of Iron IV） 发布于 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.
钢铁雄心4：Mobilization Pack（Hearts of Iron IV: Mobilization Pack） Includes the base Hearts of Iron IV game and the following expansions: Together for Victory Death or Dishonor Waking the Tiger Man the Guns

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
共赴胜利（Together for Victory） 发布于 2016-12-15. New national focus trees and events: Focus trees for 加拿大, 澳大利亚, 新西兰, the 英属印度 (India) and 南非. 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.
玉碎瓦全（Death or Dishonor） 发布于 2017-06-14. Four New Focus Trees: Experience the war from the difficult perspectives of 匈牙利王国, 罗马尼亚王国, 捷克斯洛伐克, and 南斯拉夫. 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.
唤醒勇虎（Waking the Tiger） 发布于 2018-03-08. National Focus Trees for China: Guide File:China.png 中华民国 or the 中共 through the war, guided by your own vision of the future. Modified Focus Trees: 德意志国 and File:Japan.png 日本, 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.
炮手就位（Man the Guns） 发布于 2019-02-28. Major Alternate Paths: Revive the Old Confederacy as the 美利坚合众国 and provoke a new civil war, or hasten decolonization of the 联合王国. 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 荷兰 and 墨西哥. 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.
抵抗运动（La Résistance） 发布于 2020-02-25. New Focus Trees for France: New National Focuses for Free 法国 and the 维希法国 Regime, as well as an option for conservatives to restore the old French Monarchy. More in Depth Spanish Campaign: New National Focuses for 西班牙共和国 and 西班牙国, 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 葡萄牙. 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) 发布于 2016-06-06. Focuses on 波兰 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) 发布于 2016-06-06. Allied Radio: Composed by Tobias Gustafsson. Dance Your Troubles Away (3:39) From Glen to Glen (3:13) The Man on the British Countryside (3:10) Winter Came Spring (3:03) German March Order: Composed by Andreas Waldetoft. Der Machtigste Konig im Luftrevier (3:40) Panzerlied (3:12) Schwarzbraun ist die Haselnuss (2:23) Also includes the War Stories e-book pack.
Sabaton Soundtrack 发布于 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). Hearts of Iron (4:28) Primo Victoria (4:11) Stalingrad (5:18) Wolfpack (5:56) Night Witches (3:01)
Sabaton Soundtrack Vol. 2 发布于 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). Ghost Division Resist and Bite Coat of Arms Uprising Screaming Eagles 40:1 Panzerkampf Smoking Snakes To Hell and Back The Last Battle
Radio Pack 发布于 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 发布于 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: Winston Churchill - Their finest hour Winston Churchill - We shall fight on beaches Winston Churchill - Blood, toil, tears and sweat Neville Chamberlain - Peace in our time Neville Chamberlain - Declaration of War Dwight D. Eisenhower - Order of the day Douglas MacArthur - I have returned Douglas MacArthur - Today the guns are silent Franklin D. Roosevelt - A date which will live in infamy Franklin D. Roosevelt - The Great Arsenal of Democracy Harry S. Truman - Warning to Japan Joseph Stalin - No invincible armies Georgy Zhukov - Victory Parade

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) 发布于 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: 法国 德意志国 苏维埃联盟 联合王国 美利坚合众国
Anniversary Pack (A free DLC) 发布于 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 波兰.
Axis Armor Pack 发布于 2019-06-04. Axis Armor Units: Adds 53 armor models for fascist regimes: 德意志国: 19 models from a range of tank destroyers, self propelled artillery and self propelled anti-air vehicles, including the Stug III, the Wespe and the Elefant heavy tank destroyer. 意大利: 12 models from a roster of Semovente tank destroyers and the always outmatched L6 tank highlight this list of Italian armor from the war. File:Japan.png 日本: 22 models from a range of every armor type, with seven different Japanese tank designs like the experimental heavy O-I tank that never went into production and a number of tank destroyers. Axis Tank Units: Adds 8 tank units to 德意志国, including the King Tiger and the Maus super heavy tank.
Allied Armor Pack 发布于 2020-06-04. Allied Armor Units: Adds a number of new armored and tracked vehicles for the Allies and Comintern powers: 法国: 8 units, including the Renault tank destroyer and the Canon de 194 self-propelled artillery. 苏维埃联盟: 13 units , including the early AT-1 tank destroyer and five SU artillery variants. 联合王国: 7 units , including the the Deacon tank destroyer, Canada’s Sexton self-propelled artillery and Crusader anti-air units. 美利坚合众国: 17 units , including the celebrated M7 Priest and the prototype M9 heavy tank destroyer. Allied Tank Units: Adds 32 tanks (8 units for each nation), ranging from light to super-heavy, for: 法国 苏维埃联盟 联合王国 美利坚合众国

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 发布于 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) 发布于 2016-06-06. A 23-page book with art from the creation process of Hearts of Iron IV.

File names

/Hearts of Iron IV/dlc 中 DLC 文件的对应关系表（粗体为扩展包）：

• dlc001 – Historical German Portraits
• dlc002 – Poland: United and Ready
• dlc003 – Rocket Launcher Unit Pack
• dlc004 – Famous Battleships Unit Pack
• dlc005 – Heavy Cruisers Unit Pack
• dlc006 – Soviet Tanks Unit Pack
• dlc007 – German Tanks Unit Pack
• dlc008 – French Tanks Unit Pack
• dlc009 – British Tanks Unit Pack
• dlc010 – US Tanks Unit Pack
• dlc011 – German March Order Music Pack
• dlc012 – Allied Radio Music Pack
• dlc013 – Sabaton Soundtrack
• dlc014 – Wallpaper
• dlc016 – Art of War (e-book)
• dlc018 – 共赴胜利
• dlc019 – Sabaton Soundtrack Vol.2
• dlc020 – 玉碎瓦全
• dlc021 – Anniversary Pack
• dlc022 – 唤醒勇虎
• dlc023 – 炮手就位
• dlc025 - Axis Armor Pack
• dlc026 - Radio Pack
• dlc027 - La Resistance preorder bonus
• dlc028 – 抵抗运动
• dlc029 - Allied Armor Pack
• dlc030 - Allied Speeches Pack
• dlc031 - Battle for the Bosporus
• dlc032 – Eastern Fronts Planes Pack
• dlc033 – Songs of the Eastern Front
• dlc034 – 寸步不退
• dlc035 – No Step Back preorder bonus
• dlc036 – 唯有浴血
• dlc037 – By Blood Alone preorder bonus
• dlc038 – 以力御暴
• dlc039 – Arms Against Tyranny preorder bonus
• dlc040 – 忠诚试炼
• dlc041 – Trial of Allegiance preorder bonus
• dlc042 – Content Creator Pack - Soviet Union 2D Art
• dlc043 – Gotterdammerung (Götterdämmerung)
• dlc044 – Expansion Pass 1 Bonus - Ride of the Valkyries Music
• dlc045 – Expansion pass 1 Bonus - Supporter Pack