Developer diaries
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No Step Back
Battle for the Bosporus
La Résistance
Man the Guns
Waking the Tiger
Death or Dishonor
Together for Victory
Base version
No Step Back Battle for the Bosporus La Résistance Man the Guns Waking the Tiger Death or Dishonor Together for Victory Base version Developer diaries are articles, sometimes accompanied by videos, published by Paradox to describe the game design in detail.
By Blood Alone[edit | edit source]
All developer diaries about the By Blood Alone expansion and patch 1.12 (aka Avalanche).
- Patch 1.12 (Avalanche)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 6 | Developer Diary | Switzerland #1 | A look at the historical branch of the Swiss focus tree. | 2022-06-22 |
| 5 | Developer Diary | Italy #1 | A look at the common and historical branches of the updated Italian focus tree. | 2022-06-15 |
| 4 | Announcement | Hearts of Iron 4: By Blood Alone | Announcement for the upcoming By Blood Alone expansion, teasing content for Italy, Ethiopia, Switzerland, a plane designer and divisional commanders. | 2022-06-07 |
| 3 | Naval Rebalance | Designer Corner | Goals and implementation plans for naval rebalance. | 2022-06-01 |
| 2 | Air Changes | Developer Corner | Open discussion for changes to Air management and combat. | 2022-05-18 |
| 1 | Designer Corner: Peace Conference | Open discussion for changes to peace conferences. | 2022-05-04 |
No Step Back[edit | edit source]
All developer diaries about the No Step Back expansion and patch 1.11 (aka Barbarossa).
- Patch 1.11 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 30 | Telemetry and data | Gameplay stats report | 2022-02-23 |
| 29 | Thoughts & roadmap | 2022 content battleplan | 2022-02-09 |
- Patch 1.11 (Barbarossa)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 28 | Patch Notes! | 1.11 patch notes | 2021-11-17 |
| 27.5 | Bonus Diary: No Step Back Formable & New Tags | A look at the new tags and formables coming with NSB | 2021-11-12 |
| 27 | No Step Back Achievements | New achievements for No Step Back | 2021-11-10 |
| 26 | A Tech Lead's Life | Tech support changes and a new French communist leader | 2021-11-03 |
| 25.5 | Extra Treats - Railways! | Overview of the railway map in NSB | 2021-10-29 |
| 25 | Loading Screen Art and more | Process of creating new loading screens, A look at some portraits and achievements of NSB | 2021-10-27 |
| 24 | Modding Changes | Introduction of the character system, modability of NSB features | 2021-10-20 |
| 23 | Officer Corps Recap & AI Improvements | Recap of Officer Corps changes and introduction of AI improvements | 2021-10-13 |
| 22.5 | Sub-Developer-Diary - Combat targeting iteration | Further balancing and changes to targeting | 2021-10-06 |
| 22 | Poland is not yet lost - No step back AAR | Recap of CraniumMuppet's experience with Poland in the new update | 2021-10-06 |
| 21 | Combat Changes & Soviet Exiles | Changes to Combat and Soviet Exiles focus branch | 2021-09-29 |
| 20 | Bag of Tricks : the Sequel | Changes to Redeployment, Scorched Earth, and General Preferred Tactics | 2021-09-15 |
| 19 | Railway guns never tire | New Railway Gun Land Unit Type | 2021-09-08 |
| 18 | Traiiiiins | A further look at trains, air missions to attack them, and supply distribution | 2021-09-01 |
| 17 | Bag of Tricks #2 | Changes to weather, QoL changes concerning equipment and building in allied territories / Departure of Game Director Dan "Podcat" Lind | 2021-08-25 |
| 16 | Soviet Union Exiles | New focus branches for the return of the Whites or the Tsar | 2021-08-18 |
| 15 | Soviet Union Opposition | New focus branches for the communist opposition against Stalin | 2021-08-11 |
| 14 | Soviet Union Historical and Common Branches | A look at the historical and shared parts of the new Soviet Focus Tree and new mechanics for the Soviet Union | 2021-08-04 |
| 13 | Supply and Mulberry Harbors | Deeper look at the new supply system | 2021-06-30 |
| 12 | Officer Corps #2 | More information about the Officer Corps | 2021-06-23 |
| 11 | Officer Corps | New Officer Corps system and changes to Experience | 2021-06-16 |
| 10 | Bag of Tricks #1 | Small features and QoL improvements to the game | 2021-06-09 |
| 9 | PDXCON - HoI Q&A Panel Transcript | PdxCon Q&A with the devs | 2021-05-27 |
| 8 | PdxCon Recap and Team update | Recap of PdxCon announcements and some statistics updates | 2021-05-26 |
| 7 | The Baltic States 2/2 | More changes coming to the Baltic states | 2021-05-19 |
| 6 | The Baltic States 1/2 and Poland 3/2 | A first look at changes coming to the Baltic states, and more on Poland | 2021-05-12 |
| 5 | Combat and Stats changes | A look at changes coming to combat | 2021-05-05 |
| 4 | Tank Designer | Look at the changes coming to tank design with the upcoming DLC | 2021-04-28 |
| 3 | Poland Focus Tree Rework Part 2/2 | Look at the changes to the Polish tree in the upcoming DLC | 2021-04-21 |
| 2 | Poland Focus Tree Rework Part 1/2 | Introduction of the reworked Polish focus tree coming with the free update | 2021-04-14 |
| 1 | Early look at supply and the coming year | An early look at the new supply/war system | 2021-04-07 |
Battle for the Bosporus[edit | edit source]
All developer diaries about the Battle for the Bosporus country pack and patch 1.10 (aka Collie).
- Patch 1.10 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 9 | 5th Anniversary | Hearts of Iron IV 5th Anniversary and patch | 2021-06-02 |
| 8 | New year update | Statistics after Battle for the Bosporus, general view on 2021. | 2021-01-20 |
| 7 | Telemetry | Short description of Telemetry of how player behaviour changed since the DLC release | 2020-10-21 |
- Patch 1.10 (Collie)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 6 | 1.10 ‘Collie’ | Full changelog | 2020-10-14 |
| 5 | Art and Achievements | New art, music, and achievements. | 2020-10-07 |
| 4 | Yugoslavia and Romania | Description of Yugoslav focus tree changes and briefly talking about pathways and talking about minor changes to Romania | 2020-09-30 |
| 3 | Turkey | Description of Turkish focus tree and briefly talking about pathways. | 2020-09-23 |
| 2 | Bulgaria | Description of Bulgarian focus tree and briefly talking about pathways. | 2020-09-16 |
| 1 | Greece | Description of Greek focus tree and briefly talking about pathways. | 2020-09-09 |
La Résistance[edit | edit source]
All developer diaries about the La Résistance expansion and patch 1.9 (aka Husky).
- Patch 1.9 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 34 | 4th Anniversary + Patch 1.9.3 | HoI4s 4th anniversary: Some cool data, new armor and radio packs as well as patch to celebrate! | 2020-06-03 |
| 33 | Patch 1.9.2 Husky Live | Patch release and current 'work from home' status | 2020-05-06 |
| 32 | 1.9.2 Beta + The Future | Beta patch available to test | 2020-04-15 |
| 31 | 1.9.1 Patch & Roadmap update | Full info about patch 1.9.1 and the roadmap for future DLCs and updates | 2020-04-08 |
| 30 | 1.9.1 Beta Batch Update IV | Info about patch 1.9.1, 3D models and accessability | 2020-04-01 |
| 29 | 1.9.1 Beta Batch Update III | Info about patch 1.9.1, peace conferences and tech stealing | 2020-03-25 |
| 28 | 1.9.1 Beta Batch Update II | Fire Operatives and Nudger access | 2020-03-18 |
| 27 | 1.9.1 Beta Patch Update | Updates to Spanish focus trees and the Spanish Civil War | 2020-03-11 |
| 26 | LaR Post Release and Statistics | Statistics on LaR and announcement 1.9.1 beta | 2020-03-04 |
- Patch 1.9 (Husky)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 25 | Modding & 1.9 Patchlog | 1.9 Patchlog and New Modding Features | 2020-02-21 |
| 24 | AI & Feature Updates | Changes to AI and some Features in the Update | 2020-02-19 |
| 23 | LaR UK AAR | How it Feels to Play in the New Update | 2020-02-12 |
| 22 | Achievements | Achievements | 2020-02-05 |
| 21 | LaR Music and Art | New Art and Music | 2020-01-29 |
| 20 | Formables and Releasables | New Formable Nations and Releasable Nations | 2020-01-22 |
| 19 | Bag of Tricks | Quality of Life Changes like Automatic MEFO Bills, Exercise Auto Stop, and Searchable & Zoomable Focus Trees | 2020-01-15 |
| 18 | Portugal | New Portuguese Focus Tree | 2019-12-18 |
| 17 | Intel | More changes to Intel | 2019-12-11 |
| 16 | Scout Planes and breaking the Enigma | New Scout Plane Air Unit Type and Additions & Changes to Intel and Cryptology | 2019-12-04 |
| 15 | Collaboration, Compliance and Coups | Coup and Collaboration Operations | 2019-11-27 |
| 14 | Operations | New Operations | 2019-11-20 |
| 13 | Focus Tree Navigation | Focus Tree Navigation | 2019-11-13 |
| 12 | Operatives and Missions | New Operatives and Missions they can perform | 2019-11-06 |
| 11 | The Intelligence Agency | New Intelligence Agency | 2019-10-30 |
| 10 | Back from PdxCon | Talks about what they talked about at PdxCon and talks about their new offices | 2019-10-23 |
| 9 | PdxCon & Moving Madness | Talks about moving offices and talks about what there going to talking about in PdxCon | 2019-10-16 |
| 8 | Armored Cars - The new horsey boys | New Armored Car Land Unit Type | 2019-10-09 |
| 7 | ¡No Pasarán! | Republican Spain Focus Tree | 2019-10-02 |
| 6 | ¡Viva España! | Nationalist Spain Focus Tree | 2019-09-25 |
| 5 | Policing Garrison Rework | Rework of Resistance Suppression and Garrisons | 2019-09-18 |
| 4 | Free France and Vichy | Rework of Free France and Vichy France | 2019-09-11 |
| 3 | Resistance and Compliance | Rework of the Occupation system | 2019-09-04 |
| 2 | France Rework | Rework of French focus tree | 2019-08-28 |
| 1 | Back From Summer! | Back from vacation to a new round of DDs | 2019-08-21 |
Man the Guns[edit | edit source]
All developer diaries about the Man the Guns expansion, patch 1.6 (aka Ironclad), patch 1.7 (aka Hydra) and patch 1.8 (aka Fork).
- Patch 1.8 (Fork)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 44 | 1.8 Patch (wut?!) & Focus Tree Navigation | The launcher patch and some balance changes | 2019-11-13 |
| 43 | New Launcher for Hearts of Iron IV | The new unified Paradox launcher to arrive on HoI4 | 2019-11-12 |
- Patch 1.7 (Hydra)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 42 | Tech bugaloo II - Dragonslaying! | 1.7.1 patch plans and overview of Out of Sync errors | 2019-06-12 |
| 41 | 3 Year Anniversary! | 1.7 'Hydra' release, 3 year anniversary, response to some Twitter questions | 2019-06-05 |
| 40 | 1.7 Update and Radio & Armor Packs | Overview of the 1.7 update and 2 new art and music DLCs to celebrate the 3 year anniversary release | 2019-05-29 |
| 39 | 1.7 Update II - Technical boogaloo! | Further news on 64 bit, naval combat balance, optimization | 2019-05-22 |
| 38 | News from the Eastern Front | Patch 1.7 'Hydra' bringing 64 bit, AI frontline & player frontline UI changes | 2019-05-15 |
- Patch 1.6 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 37 | 1.6.2 and Roadmap | 1.6.2 release, future roadmap and announcement of 1.7 "Hydra" and 1.8 "Husky". | 2019-04-03 |
| 36 | 1.6.2 Update | 1.6.2 Highlights and patchlog | 2019-03-27 |
| 35 | 1.6.2 Open Beta Patch | 1.6.2 open beta patch content and AI naval screen statistics | 2019-03-20 |
| 34 | 1.6.1 Patch and Statistics | Full 1.6.1 "Ironclad" patch log, info about the 1.6.2 beta and player statistics. | 2019-03-13 |
| 33 | MTG Post Release | Small telemetry information and what's planned for the patch. | 2019-03-06 |
- Patch 1.6 (Ironclad)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 32 | 1.6 Patchlog | Full 1.6 "Ironclad" patch log and Reddit AMA highlights. | 2019-02-27 |
| 31 | Man the Guns MEGA RECAP | Recap of everything that has been announced. | 2019-02-20 |
| 30 | AI Plans | More AI strategy plans, and the integration of AI strategy into the Custom Game Rules menu. | 2019-02-13 |
| 29 | Achievements | New goals to strive for, with the addition of 21 new achievements related to MTG. | 2019-02-06 |
| 28 | The Imperial Japanese Navy | An AAR of Archangel85's experience with the Imperial Japanese Navy in a MP session. | 2019-01-30 |
| 27 | Art and Music | New music, 3D models and 2D art to ramp up MTG's awesomeness. | 2019-01-23 |
| 26 | Tech Changes | Changes to the tech research system and the addition of new naval techs. | 2019-01-16 |
| 25 | Fuel Review and Motorized Artillery | Changes to the fuel implementation and the addition of motorized artillery units | 2019-01-09 |
| 24 | Subs and Convoy Raiding | Improvements to submarine convoy raiding | 2018-12-12 |
| 23 | New Naval Combat | Rework of naval combat to be more informative and less decisive | 2018-12-06 |
| 22 | Bag of Tricks #3 | Dutch & British focus changes, ideology drift tweaks, map changes in Africa and the Balkans region. | 2018-11-28 |
| 20 | Naval Treaties and Ship Refits | Naval treaties effects on ship designing and refitting of obsolete ships | 2018-11-14 |
| 19 | Ship Designer | Overview on modifications on the ship designer system. | 2018-11-07 |
| 18 | Bag of Tricks 2 | Expeditionary Force Requests, Supervised States & On-map decisions. | 2018-10-31 |
| 17 | Mexico focus tree | Announcement of and information about the new Mexican focus tree. | 2018-10-24 |
| 16 | Naval changes #1 | Overview of the different changes to naval warfare. | 2018-10-17 |
| 15 | Naval Terrain | Overview of new terrain types for seas. | 2018-10-10 |
| 14 | Amphibious Vehicles and Research | New Amphibious Tractors and Amphibious Tank. | 2018-10-03 |
| 13 | Je Maintiendrai | Announcement of and information about the new Dutch focus tree. | 2018-09-26 |
| 12 | Exiled Government | Extend possibilities for exiled governments and more information about the British focus tree overhaul. | 2018-09-19 |
| 21 | Naval Rework #1 | New mission types and changes to the naval interface | 2018-11-21 |
| 11 | Naval Production, Repair and Damage | Extensive changes to the naval theater with reworks of ship production, repair and damage. | 2018-09-12 |
| 10 | Modding and Traits | Added trait system for admirals as well as more features for modders. | 2018-09-05 |
| 9 | USA focus tree rework | Reworked USA focus tree, allowing for alternate-history paths. | 2018-08-29 |
| 8 | Mines and Minesweeping | Naval Mines added to the game along with minesweeping. | 2018-08-22 |
| 7 | Naval Access | Improvements to the naval theater of HOI4 including marking dangerous seazones and asking for naval access to ports. | 2018-08-15 |
| 6 | MTG - Bag of Tricks | Smaller improvements to the game such as assuming leadership of a faction, manual focus cancellation, and naval and air exercises. | 2018-08-08 |
| 5 | Custom Gameplay Rules | New Custom Gameplay Rules allowing the player to steer the game in the direction they want. | 2018-08-01 |
| 4 | A Post-Colonial World:Map Changes and New Tags | Sweeping changes to the map along with the addition of more releasable tags. | 2018-07-11 |
| 3 | God Save The King: British Focus Tree Rework | Reworked British focus tree, allowing for alternate-history paths. | 2018-07-04 |
| 2 | Fuel | Information on fuel and new hotfix. | 2018-06-27 |
| 1 | Man the Guns and PdxCon | General goals for the future expansion and patch | 2018-05-23 |
Waking the Tiger[edit | edit source]
All developer diaries about the Waking the Tiger expansion and patch 1.5 (aka Cornflakes).
- Patch 1.5 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 34 | 1.5.2, Future Roadmap and Ironclad | The return of the bullet list and possible future development roadmap | 2018-04-11 |
| 33 | 1.5.2 Update #3 and Telemetry | An updated beta and multiplayer telemetry | 2018-04-04 |
| 32 | 1.5.2 Update #2 and Modding Goodies | Info about patch 1.5.2: Air Balance and Changes, Nukes and Surrender, Manchukuo, Modding and more. | 2018-03-28 |
| 31 | 1.5.2 Update #1 | Info about patch 1.5.2: German border changes, commander XP gain changes, multiplayer desyncs, and more. | 2018-03-21 |
| 30 | Post-Release patch | Info about patch 1.5.1 | 2018-03-14 |
- Patch 1.5 (Cornflakes)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 29 | Pre-Release and International Women's Day | Women's contribution during the second world war. | 2018-03-07 |
| 28 | Recap Episode | What is coming in Waking the Tiger and the 1.5 Cornflakes. | 2018-02-28 |
| 27 | Performance and AI | Performance and AI. | 2018-02-21 |
| 26 | Formable Nations and Achievements | New goals to strive for: formable nations and some 18 achievements. | 2018-02-14 |
| 25 | Naval Updates | Improvements of naval matters: losses and kills overview, convoys raiding, transports interception, and more. | 2018-02-07 |
| 24 | Sound, Music and Art for Tiger | On the topic of the artistic additions to Waking the Tiger. | 2018-01-31 |
| 23 | War Changes and game Difficulty | Changes to 3-way war handling and addition of 2 more difficulty settings. | 2018-01-24 |
| 22 | Manchukuo | The last unrevealed focus tree for Waking the Tiger: "Manchukuo". | 2018-01-17 |
| 21 | Bag of Tricks #3 | 3rd assortment of small improvements: attachés, extra ground crews, historical army insignias, and volunteer air wings. | 2018-01-10 |
| 20 | Japan rework | A rework of the Japanese national focus tree. | 2018-01-03 |
| 19 | New German Divisional Namelist | Further improvement of incoming German unit namelist. | 2017-12-27 |
| 18 | Christmas & Modding | Modding guide for the new decisions & missions system in patch 1.5. | 2017-12-20 |
| 17 | Border Wars: The Last Warlord | More detail on the Chinese warlords. | 2017-12-13 |
| 16 | Acclimatization and Special Forces | Troops are now affected by hot and cold climates, and new changes to special forces. | 2017-12-06 |
| 15 | Leaders, abilities and Traits | Revamped and expanded trait system and the mysterious "red phone" icon (aka command power). | 2017-11-29 |
| 14 | Communist China | The 2nd focus tree for China (the communist path) along with an example of the new decision system in action. | 2017-11-22 |
| 13 | Nationalist China | The 1st focus tree for China (the nationalist path) as well as the announcement of Waking the Tiger expansion. | 2017-11-15 |
| 12 | Decisive Action | Adding decisions, missions, crises and special projects to the game | 2017-11-08 |
| 11 | Airplanes and Lootboxes | Further improvement of air related aspects | 2017-11-01 |
| 10 | Bag of Tricks #2 | Another small features and improvements, this time with relation to equipment | 2017-10-25 |
| 9 | A New Germany | Revised focus tree for Germany as part of requested alternate history options | 2017-10-18 |
| 8 | Bag of Tricks #1 | Smaller improvements to the game: control groups, divisions consolidation, removal from faction, mini-map & pinging. | 2017-10-11 |
| 7 | Synthetic Dawn | Refinements to synthetic refineries and inter-linking infrastructure with resources | 2017-10-04 |
| 6 | Division Namelists | Pallidum, HoI4's game designer, inserting some flavor (and logic) to division names. | 2017-09-27 |
| 5 | Stability and War Support | Stability and War support to replace National unity in the next patch | 2017-09-20 |
| 4 | Chain of Command | Podcat on spicing things up in the HoI4 chain of command as part of patch 1.5 | 2017-09-13 |
| 3 | A Product Manager's Role | "Firebolt", HoI4's product manager, on the intricacies of budgeting a game development. | 2017-09-06 |
| 2 | Our development process | Sofia "KimchiViking" Höglund, HoI4's project lead, explains the development cycle, from design to implementation. | 2017-08-30 |
| 1 | Future and Cornflakes | Podcat shares the team's (non-exhaustive) list of features to act as a future development roadmap for HoI4 | 2017-08-23 |
Death or Dishonor[edit | edit source]
All developer diaries about the Death or Dishonor country pack and patch 1.4 (aka Oak).
- Patch 1.4 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 13 | We're back! | New beta patch with additional fixes, more portraits for free and an interim solution to an old AI transport problem | 2017-08-16 |
| 12 | Meet some new people | Beta patch status, preliminary gaming statistics post DoD and introduction of new team members | 2017-06-28 |
| 11 | Post-release chat | Bugs, new and old, dealt with in the 1.4.1 beta patch. | 2017-06-21 |
- Patch 1.4 (Oak)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 10 | 1.4 "Oak" Changelog sneak peek | Patch 1.4, aka Oak, changelog. | 2017-06-12 |
| 9 | Bits & Bobs | New subject levels, achievements, music, assorted QoL features and AI Update #3. | 2017-06-07 |
| 8 | Czechoslovakia and AI Update #2 | Let's have a look at Czechoslovakia and another AI update from Steelvolt | 2017-05-31 |
| 7 | Yugoslavia and Air Zones | Yugoslavia unique flavor and more details on aerial combat overhaul in 1.4 Oak | 2017-05-24 |
| 6 | Air Improvements | Air combat overhaul in 1.4 Oak | 2017-05-17 |
| 5 | Equipment Conversion & War Update | Repurposing old material and improvements to the war overview | 2017-05-10 |
| 4 | Hungary | Hungary changes coming up | 2017-05-03 |
| 3 | Announcement and AI Update #1 | Announcement of new content pack coming with the free 1.4 Oak along with details on AI improvements | 2017-04-26 |
| 2 | License production and map changes | 1.4 Oak and the upcoming expansion will see map improvements and new ways of getting tech | 2017-04-19 |
| 1 | Reflections and Romania | First look at new DLC content | 2017-04-12 |
Together for Victory[edit | edit source]
All developer diaries about the Together for Victory country pack and patch 1.3 (aka Torch).
- Patch 1.3 post release
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 24 | 1.3.3 Patch #3 | The patch should now be ready for release | 2017-02-22 |
| 23 | Patch 1.3.3 Update #2 | Details on QoL improvements, AI update, performance and optimizations done in the coming patch | 2017-02-15 |
| 22 | Patch 1.3.3 Update #1 | Changes done to industry, world tension and capitulation in the upcoming patch | 2017-02-08 |
| 21 | 1.3.3 Modding Features | More modding features coming | 2017-02-01 |
| 20 | Getting started with modding | Havebeard goes over modding requests and modding tips for beginners | 2017-01-25 |
| 19 | Squanching them bugs | Planned changes for 1.3.3 and general focus for the 1.4 Oak patch | 2017-01-18 |
| 18 | Back from Christmas | 1.3.2 hotfix patch soon in public beta | 2017-01-11 |
| 17 | XMAS & Hotfix out! | It's time for holidays! Development diaries will be back again in 2017! | 2016-12-21 |
- Patch 1.3 (Torch)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 16 | Achievements & Patchlog | New Achievements and 1.3 changelog | 2016-12-14 |
| 15 | TFV AI Update #4 | Part 4 of AI bugfixes and updates for TFV | 2016-12-14 |
| 14 | TFV AI Update #3 | Part 3 of AI bugfixes and updates for TFV | 2016-12-12 |
| 13 | TFV AI Update #2 | Part 2 of AI bugfixes and updates for TFV | 2016-12-09 |
| 12 | Cosmetic tags, art, gameplay and AI | One week to the release of Together for Victory! | 2016-12-07 |
| 11 | Together for Audio | Music and Audio in Together for Victory | 2016-11-30 |
| 10 | New Zealand & Combat Log | New Zealand focus and tech trees as well as a combat log | 2016-11-23 |
| 9 | India - Struggle for Independence | A closer look at the changes coming for India in Together for Victory | 2016-11-16 |
| 8 | Autonomy | New levels for subject nations coming in Together for Victory | 2016-11-09 |
| 7 | South Africa and Continuous focuses | South Africa and Continuous focuses | 2016-11-02 |
| 6 | Ally Down Under | Australia updated in Together for Victory | 2016-10-26 |
| 5 | Oh Canada! | Canada and the Commonwealth | 2016-10-19 |
| 4 | Blitz Command and Garrison Orders | Blitz Command coming in the next expansion, garrison orders in the free patch | 2016-10-12 |
| 3 | Memory Lane | A look at how some concepts have changed over the HoI series, such as: supply, upgrades, reinforcement and more. | 2016-10-05 |
| 2 | The Team | Presentation of the current HoI4 team lineup | 2016-09-28 |
| 1 | Future Focus | Focus for 1.3 / upcoming expansion along with general plans for the expansions beyond | 2016-09-23 |
Base game[edit | edit source]
All developer diaries about Hearts of Iron IV (base game), Patch 1.0, Patch 1.1 (aka Red Ball Express), and Patch 1.2 (aka Sunflower)
- Patch 1.2 (Sunflower)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 69 | Sunflower is Live | Patch 1.2 is out live, next patch is 1.3 aka "Torch" | 2016-09-16 |
| 68 | Bugs and Stats | Readying Sunflower for release and sharing some gameplay stats | 2016-09-09 |
| 67 | Sunflower Improvements | Sunflower updates: GUI improvements, naval balance, focus trees | 2016-09-02 |
| 66 | New Releasable Nations | A look at new releaseable nations and more of the AI improvements coming in Sunflower (patch 1.2) | 2016-08-26 |
| 65 | Sunflower (patch 1.2) | Port Strikes and AI improvements to upgrading templates and naval missions coming in Sunflower | 2016-08-19 |
| 64 | Custom Difficulty Settings | AI improvements and implantation of custom difficulty settings at game setup | 2016-08-12 |
| 63 | Back from Vacation | AI changes and MP hotjoin in 1.2, aka 'Sunflower' | 2016-08-05 |
- Patch 1.1 (Red Ball Express)
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 62 | Summer Vacation | The team is going on a well deserved summer vacation | 2016-07-01 |
| 61 | Red Ball Express | Tweaks to access to allied territory, peace conferences, invasions and naval bombers along with new battle plan modes upcoming in 'Red Ball Express' | 2016-06-17 |
| 60 | Release and Future | Podcat shares his thoughts on the release, as well as discussing the near future patches | 2016-06-10 |
- Patch 1.0
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 59 | D-day | A short, final message from Podcat before we release | 2016-06-03 |
| 58 | Tutorial, Wiki & Browser | A look at the tools we provide to help you learn how to play Hearts of Iron IV | 2016-05-27 |
| 57 | Poland: United and Ready | About the free DLC shipped with all copies of Hearts of Iron IV | 2016-05-20 |
| 56 | Bits & Pieces | Mopping up a bunch of smaller topics not covered in other Development Diaries | 2016-05-13 |
| 55 | QA | A closer look into the QA process when developing Hearts of Iron IV | 2016-05-06 |
| 54 | AI | SteelVolt speaks of the topic no one wants to touch, but everyone wants to know about | 2016-04-29 |
| 53 | 2D art | Sideburnout talks about the 2D graphics of Hearts of Iron IV | 2016-04-22 |
| 52 | Modding | A look at the improved modding support in Hearts of Iron IV | 2016-04-15 |
| 51 | Sound & Music | Music & Sound Design in Hearts of Iron IV | 2016-04-08 |
| 50 | Generic Focus Trees | Generic Focus trees and DDR mat support | 2016-04-01 |
| 49 | Nukes! | Atomic bomb - Research and requirements for production and use | 2016-03-18 |
| 48 | Naval Invasions | How naval invasions work | 2016-03-11 |
| 47 | China | Overview of China | 2016-03-04 |
| 46 | United Kingdom | Overview of UK | 2016-02-26 |
| 45 | Battle Plans | How battle plans work | 2016-02-19 |
| 44 | Occupation and Resistance | Managing occupied territory | 2016-02-12 |
| 43 | Diplomacy and other options | Diplomacy, Factions, War Goals, ... also: HOI4 is now in BETA | 2016-02-05 |
| 42 | Japan | Overview of Japan | 2016-01-29 |
| 41 | Order of Command | OOC and Commander traits | 2016-01-22 |
| 40 | Changes to the game | Completely revised factory slots mechanic, World Tension.. | 2016-01-15 |
| 39 | The Radio | Radios, reinforce chance and radar stations | 2016-01-08 |
| 38 | Submarines | How submarines work | 2015-12-18 |
| 37 | Carrier Warfare | How aircraft carriers work | 2015-12-11 |
| 36 | Helping out in other wars | Helping out in other countries wars without directly getting involved | 2015-12-04 |
| 35 | Germany | Overview of Germany | 2015-11-27 |
| 34 | Civil Wars | Civil wars and coups | 2015-11-20 |
| 33 | Supply | The supply system and supply areas | 2015-11-13 |
| 32 | The USA | Overview of USA | 2015-11-06 |
| 31 | Peace Conferences | Ending wars | 2015-10-30 |
| 30 | France | Overview of France | 2015-10-23 |
| 29 | Factions & Wargoals | How factions and wargoals function | 2015-10-16 |
| 28 | Weather & Terrain | How weather and terrain function | 2015-10-09 |
| 27 | Italy | Italy's situation in the game | 2015-10-02 |
| 26 | The Navy | Naval doctrines and naval technology | 2015-09-25 |
| 25 | Laws and Politics | How to manage government | 2015-09-18 |
| 24 | Trade and Resources | Overview of international trading | 2015-09-11 |
| 23 | Industrial Capacity | How factories function | 2015-09-04 |
| 22 | Support Companies | List of support companies | 2015-08-28 |
| 21 | Land Combat | Land combat mechanics | 2015-08-21 |
| 20 | Soviet Union and Communism | Soviet Union and communism | 2015-08-14 |
| 19 | Equipment | How equipment works | 2015-07-03 |
| 18 | Army Planner | Creating and deploying units | 2015-06-26 |
| 17 | Johan Invades Germany | Barely a dev diary | 2015-06-12 |
| 16 | World Tension | World tension, war justifications | 2015-05-08 |
| 15 | On the high seas | Naval battles | 2015-04-11 |
| 14 | National Focuses | National focuses | 2015-03-20 |
| 13 | Conscription & Training | Manpower, recruitment, training | 2015-02-20 |
| 12 | Internal Politics | Internal affairs of a country | 2015-01-16 |
| 11 | Map & Graphics | Visual aesthetics of the game | 2014-11-07 |
| 10 | Naval Combat | Naval gameplay | 2014-10-10 |
| 9 | Vacation and Air tech | Air technology tree | 2014-09-12 |
| 8 | Experience and Variants | Production | 2014-08-08 |
| 7 | Air Combat | Air war | 2014-07-11 |
| 6 | Division Design | Division planner, division template | 2014-06-13 |
| 5 | Production Lines | How things get built | 2014-05-09 |
| 4 | Land Doctrines | Doctrine paths | 2014-04-11 |
| 3 | Bringing WWII to the mainstream | Dogs! | 2014-04-01 |
| 2 | The Tools of War | Equipment, production and research | 2014-03-07 |
| 1 | Our Vision | Design goals | 2014-02-07 |
Videos[edit | edit source]
Developer video diaries and developer's let's play sessions on the various expansions.
- Videos
| No. | Title and Link | Description | Date |
|---|---|---|---|
| 17 | Hearts of Iron IV: No Step Back - Soviet Focus Tree | ..... | 2021-11-02 |
| 16 | PDXCon 2018 - News From The Front | Dan Lind, Game Director of Hearts of Iron IV, discusses the future of HOI and its upcoming update Man the Guns. | 2018-05-20 |
| 15 | Hearts of Iron IV - Patch 1.5 "Cornflakes" | Dan "Podcat" Lind expands on the free 1.5 patch (aka Cornflakes) accompanying the Waking the Tiger expansion. | 2018-02-09 |
| 14 | Waking the Tiger #3 - Chain of Command | Dan "Podcat" Lind and Kandra Dahlgren with details on the new Chain of Command mechanic and commander traits, the new command power mechanic and division namelists/insignias. | 2018-02-07 |
| 13 | Waking the Tiger #2 - Germany & Decisions | Dan "Podcat" Lind and Drikus Kuiper with details on alt-historic path in the German focus tree, the new decision system, as well as new mechanics around stability and war support. | 2018-02-01 |
| 12 | Waking the Tiger #1 - China | Dan "Podcat" Lind and Gabriel Blum with details on the expanded representation of the Chinese fronts. | 2018-01-30 |
| 10 | Tutorial #2 - Trade, Production, Division Templates | The 2nd part of the tutorial this time covering trade, production, and division templates. With Daniel "Da9L" Sjöberg and Christian Daflos (community manager). | 2017-11-01 |
| 9 | Tutorial #1 - Interface Overview | An in-depth interface tutorial with Daniel "Da9L" Sjöberg and Christian Daflos (community manager). | 2017-10-25 |
| 8 | Death or Dishonor - Release Trailer | Release trailer detailing the features of the Death or Dishonor DLC for Hearts of Iron 4. | 2017-06-14 |
| 7 | Together for Victory - Feature Spotlight | Dan "Podcat" Lind speaks on the upcoming Together for Victory country pack and patch 1.3 | 2016-12-07 |
| 6 | PDX FanGathering 2016 | A sneak MP peak at the new HoI4 Together for Victory expansion at the 2016 PDX FanGathering | 2016-12-02 |
| 5 | Hearts of Iron 4 #3 - Politics and Coups | Johan Andersson, Dan Lind, Mats Virtanen, and Jakob Munthe discuss on the political interactions in Hearts of Iron IV. | 2016-06-01 |
| 4 | Hearts of Iron IV - Beginner Tutorial | Jake (aka DDRJake) hammers HoI4 beginner tutorials in a soothing, calming voice | 2016-05-30 |
| 3 | Hearts of Iron 4 #2 - Naval, Land and Air Power | Johan Andersson, Dan Lind, Mats Virtanen, and Jakob Munthe discuss the different types of warfare and how they're used in Hearts of Iron IV. | 2016-05-12 |
| 2 | Hearts of Iron 4 #1 - Grand Ambitions | Johan Andersson, Dan Lind, Mats Virtanen, and Jakob Munthe discuss the design and ambitions of the fourth installment of the Hearts of Iron series. | 2016-03-15 |
| 1 | Hearts of Iron 4 Live streams | Earlier previews of Hearts of Iron IV by the devs mixed with Q&A | 2014-08-18 |
- Let's Plays
| No. | Title and Link | Description | Start date | End date |
|---|---|---|---|---|
| 6 | Chain of Command | Multiplayer event of HoI4 where devs and youtubers vying for dominance | 2017-08-16 | |
| 5 | Death or Dishonor | Daniel "Da9L" Sjöberg and Dan "Podcat" Lind taking a sneak peak at the upcoming HoI4 Country Pack | 2017-04-26 | 2017-06-15 |
| 4 | Together for Victory - Launch Dev MP | Together for Victory feature stream by Dan and Daniel | 2016-12-08 | 2016-12-14 |
| 3 | The Three Day War | Multiplayer event of HoI4 where devs and youtubers vying for dominance | 2016-06-14 | 2016-06-16 |
| 2 | World War Wednesday - Pre-release | Jake and Daniel showcasing single player campaigns and co-op nations | 2016-03-17 | 2016-06-23 |
| 1 | World War Wednesday | Daniel Sjöberg (replacing Jakob Munthe as Nazi Germany) faces off against Johan Andersson (as Jolly England) in the war of the century, testing out the ins and outs of Hearts of Iron IV | 2015-12-02 | 2016-03-10 |
