Difference between revisions of "Developer diaries"

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m (Dharma: Add last dev diary)
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| 24 || [[forum:1118823|Final Post-Dharma Dev Diary]] || Post-release support including a hotfix list || 2018-09-11
| 24 || [[forum:1118823|Final Post-Dharma Dev Diary]] || Post-release support including a hotfix list || 2018-09-11
| 25 || [[forum:1119890|Post-Dharma Patch]] || The Poland update|| 2018-09-18
| 25 || [[forum:1119890|Post-Dharma Patch 1.27]] || The Poland update|| 2018-09-18

Revision as of 13:41, 18 September 2018

Emperor.png Emperor
Golden Century.png Golden Century
Dharma.png Dharma
Rule Britannia.png Rule Britannia
Cradle of Civilization.png Cradle of Civilization
Third Rome.png Third Rome
Mandate of Heaven.png Mandate of Heaven
Rights of Man.png Rights of Man
Mare Nostrum.png Mare Nostrum
The Cossacks.png The Cossacks
Common Sense.png Common Sense
El Dorado.png El Dorado
Art of War.png Art of War
Res Publica.png Res Publica
Wealth of Nations.png Wealth of Nations
Conquest of Paradise.png Conquest of Paradise
EU4 icon.png Base version

Developer diaries are articles, sometimes accompanied by videos, published by Paradox to describe the game design in detail.


All developer diaries about the Dharma expansion and patch 1.26 (aka Mughals).

No. Title and Link Description Date
1 Government Reforms "DDRJake, EU4's game director, talking on completely new system of governments in EU 4. 2018-04-03
2 Republican Reforms Continuation of previous diary that shows new reforms for republics. 2018-04-10
3 Theocracies and Tribal governments The 3rd part of the exposé on how governments will work in the next expansion. 2018-04-17
4 India Map Update New countries and provinces in India. 2018-04-24
5 Northern India Changes The 2nd DD covering the map changes made to India - this time the northern half. 2018-05-01
6 Burma, Bengal and Tibet Map changes of Southeast Asian area, including Burma, Bengal and Tibet. 2018-05-08
7 Mughal Diwans and Charter Trade Companies Culture assimilation for the Mughals and trade charters to aid the colonizer nations gain a foothold around the world. 2018-05-15
8 Estates And The Dharma Expansion Changes to the (now free) estates system, new estates for India and a new government form for The Cossacks owners. 2018-05-22
9 Refining Mission Trees: India and Russia New mission trees for Indian nations as well as the Russian nations in Third Rome. 2018-05-29
10 Charter Trade Companies Investments and Policy Rework Making Charter Trade Companies more worthwhile for all involved, as well as a rework on Policies to make them all more useful. 2018-06-05
11 Truce Mapmode and Suppressing Rebels Adding a truce mapmode, as well as an update to the autonomous rebel supression mechanic. 2018-06-12
12 Audio in the Mughals Update Franco "Audiomancer" Freda, sound designer at Paradox, on enhancing EU4's audio to today's standards. 2018-06-19
13 Two smaller features Settlement Growth and scornful insults. 2018-06-26
14 Climate, Weather and Elephants Weather mapmode, changes to winter and terrain as well as a new Indian cavalry model. 2018-07-03
15 New nations to be formed! The new formable nations as well as their national ideas 2018-07-10
16 Multiplayer and Indian Siege Graphics Allowing for players (nations) to team up in multiplayer and new graphics for Indian sieges 2018-07-17
17 Balance changes and Bengal National Ideas A round-up of the balance changes made to existing mechanics in 1.26 so far 2018-07-24
18 Evolving Centers of Trade Changing the trade setup and the ability to evolve centers of trade 2018-07-31
19 Additional Missions and National Ideas Shedding more light on the new mission trees and NIs coming in Dharma and Third Rome 2018-08-07
20 Dharma's Content Pack Elephants coming to a place nearby you in Dharma's content pack 2018-08-14
21 New Achievements A look at the new achievements coming for Dharma 2018-08-21
22 Recap of Changes Recap of the main changes incoming as part of Dharma and the 1.26 "Mughals" patch 2018-08-28
23 Mughals Update Patch Notes A sneak preview of the 1.26 Mughals patch notes 2018-09-04
24 Final Post-Dharma Dev Diary Post-release support including a hotfix list 2018-09-11
25 Post-Dharma Patch 1.27 The Poland update 2018-09-18

Rule Britannia

All developer diaries about the Rule Britannia immersion pack and patch 1.25 (aka England).

No. Title and Link Description Date
1 2018 and EUIV Firebolt speaks on the role of a product manager, immersion packs, and EU4 plans for 2018. 2018-01-09
2 Around the English Channel Trin Tragula, EU4's content designer, details the map changes made to the regions surrounding the English channel. 2018-01-16
3 Mission Trees DDRjake, EU4's game director, and the tale of the reworked mission system. 2018-01-23
4 Anglican Church and Industrialization A unique Christian denomination to appear on the British Isles and the emergence of latent resources 2018-01-30
5 Innovativeness and Knowledge Sharing New additions to technology advancement in the Rule Britannia immersion pack 2018-02-06
6 Unique Missions for the Isles Unique mission trees added for nations on the British Isles and a modding guide for the new mission system by mikesc 2018-02-13
7 Trade Steering, Naval Doctrines and the Low Countries New diplomatic and peace option, new possibilities for navies and new national ideas for the Low Countries nations. 2018-02-20
8 Naval AI changes and Irish ideas Tackling issues and solutions with the naval AI along with some new national ideas for even more Irish nations 2018-02-27
9 Unit Preview 3D artist Carlberg on New models for Irish minors, Ireland, Scotland, Brittany, revolter tags and a teaser for the music included into Immersion pack 2018-03-06
10 New Achievements New achievements available for unlocking in 1.25 patch 2018-03-13
11 England Update Changelog for 1.25 England Update 2018-03-19
12 Upcoming Hotfixes Digesting various bug reports and plans further ahead 2018-03-27

Cradle of Civilization

All developer diaries about the Cradle of Civilization expansion, patch 1.23 (aka Persia) and patch 1.24 (aka Japan).

Patch 1.23 (Persia)
No. Title and Link Description Date
1 Near East Facelift Changes in the Arabia and Egypt regions for update 1.23 2017-08-01
2 Anatolia and the Caucasus Map and general setup changes coming for the Caucasus and Anatolia regions as part of the 1.23 patch 2017-08-08
3 The Greater Iranian Region Changes in the Persian super-region and new trade goods to be introduced in patch 1.23 2017-08-15
4 Army Drills A partial overview of the new setup of trade goods and a peek at the new Army drill mechanic 2017-08-22
5 Army Professionalism Armies get expanded upon with a new professionalism level while marching into more "modern" times 2017-08-29
6 Trade Policies Use trade policies to promote profiteering, espionage, diplomacy and religion propagation. 2017-09-05
7 Piety and Muslim Schools Islam changes move piety between the Mysticism/Legalism extremes and introduces the Muslim Schools of Law 2017-09-12
8 Tribal Federations New government mechanics for Tribal Federations infuse changes to the Turkmen sheep nations in the Middle East 2017-09-19
9 The Persia Update A closer look on the changes at the Persian region and introduction of the new Feudal Theocracy government 2017-09-26
10 Ottomans Extended Restoring the Sultanate of Rûm gains access to the Ottoman Government, itself extended with Pashas and Jannisaries 2017-10-03
11 Cultures and Religions The addition of cultures and religions to the courtroom as well as special interactions for Mamluk and Iqta governments 2017-10-10
12 Startup, Missionaries and Modding Startup screens will detail the nation's situation at game start, missionaries can help in subject lands, and Groogy on extending support for modders. 2017-10-17
13 Military tidbits and AI updates A military mixed-bag of features along with parting words from Gnivom, EU4's AI programmer, accompanied by an overview of future AI improvements and any AI cheats present in 1.23 2017-10-24
14 MP streamlined MP gets several issues sorted with 1.23 - expect a more smooth experience. 2017-10-31
15 Additions and achievements Achievements for patch 1.23 revealed along with the last features of the Cradle of Civilization expansion. 2017-11-07
16 Persia Update Patch Notes A sneak preview of the 1.23 Persia patch notes 2017-11-14
17 Post Release Patch Post release bug-support in the short term and and some planned enhancements in the mid-term 2017-11-21
Patch 1.24 (Japan)
No. Title and Link Description Date
18 Japan and the Philippines Additional provinces and tags for Japan while the Philippines receive an overhaul 2017-11-28
19 Performance and balance changes Late game performance improvements and military balance changes 2017-12-05
20 Japan Update Changelog Changelog for the 1.24 Japan update. 2017-12-12
21 The 2017 Christmas wrapper A look at 2017 and overview of the EU4 team 2017-12-19

Third Rome

All developer diaries about the Third Rome immersion pack and patch 1.22 (aka Russia).

No. Title and Link Description Date
1 Historical Research Trin Tragula, EU4's content designer, on the process of historical research done with EU4 and its expansions 2017-05-02
2 Bonus Development Diary Sneak peek at features for 1.22, including Press Sailors subject interaction and changes for blockades, marches, Aristocracy ideas and Buddhism 2017-05-05
3 The Russian Principalities Trin Tragula, EU4's content designer, reveals setup changes in the Greater Russian region coming in 1.22 2017-05-09
4 Russian and Cossacks Changes New government types and abilities for the Russian regions in addition to new content for previous expansions 2017-05-16
5 Tsardom New government type comes with new abilities 2017-05-23
6 Icons and Metropolitans Jake elaborates on the expanded mechanics for the followers of the Orthodox faith 2017-05-30
7 Custom Nation Designer and Achievements Jake explains the novelties in the nation designer and introduces new achivements (from his balcony) 2017-06-06
8 Third Rome Update The Third Rome (1.22) changelog 2017-06-13
9 Changing of the Guard Anna "Anona" Norrevik on changes within the team and introduction of the new project lead Linda "Fogbound" Tiger 2017-06-20
10 EU4 Sound Effects David, the sound designer, on complementing the EU4 interface with the right sound effects 2017-06-27

Mandate of Heaven

All developer diaries about the Mandate of Heaven expansion, patch 1.20 (aka Ming) and patch 1.21 (aka Hungary).

Patch 1.20 (Ming)
No. Title and Link Description Date
1 Bits and Pieces Just released a patch, slow news day 2016-11-29
2 Devastation and Prosperity New values for provinces 2016-12-06
3 Ages of Europa Universalis The next expansion will bring forth a new system called ages 2016-12-13
4 Wrapping up 2016 A look at 2016 and a small teaser for what is to come in 2017 2016-12-20
5 Age of Reformation A detailed look at the the 2nd age, the Age of Reformation 2017-01-10
6 Age of Absolutism Absolutism is a new mechanic added for free with the patch 2017-01-17
7 Age of Revolutions After enlightenment comes revolutions 2017-01-24
8 Manchurian Banners The Eight Banners of Manchu 2017-01-31
9 State Edicts New State interface and interactions 2017-02-07
10 Japan Changes to Japan, a reworked Shogunate government form and new subject interactions for Daimyo vassals 2017-02-14
11 Tributary States New subject type for eastern civilizations 2017-02-21
12 The Empire of China Ming and the Mandate of Heaven 2017-02-28
13 Confucianism Mandate of Heaven will rework the Confucian religion 2017-03-07
14 Shintoism New mechanics and ideas for Shintoism 2017-03-14
15 The Diplomatic Macro Builder Mandate of Heaven introduce a vast improvement to perform diplomatic actions 2017-03-21
16 Breaching that Wall New Breach mechanic, Bankruptcy changes and various UI improvements 2017-03-28
17 Big Bonus One! Details on the changes in the 1.20 (aka Ming) patch accompanying the Mandate of Heaven expansion 2017-03-31
18 Ming Update The Ming Update (1.20) changelog preview 2017-04-04
Patch 1.21 (Hungary)
No. Title and Link Description Date
19 Sailors and Yuan in 1.21 Let's sneak an early peak at 1.21 2017-04-11
20 Hungary and Bohemia The Hungary update will bring some new things to Hungary 2017-04-18
21 The 1.21 Hungary Update is coming The 1.21 Hungary Update Changelog 2017-04-25

Rights of Man

All developer diaries about the Rights of Man expansion, patch 1.18 (aka Prussia) and patch 1.19 (aka Denmark).

Patch 1.18 (Prussia)
No. Title and Link Description Date
1 Future What do we want from the future of the game? 2016-05-12
2 DLC production The DLC producer explains the development process 2016-05-19
3 Technology Groups Changes to technology groups and technological development 2016-05-26
4 Culture Changes to how accepted Culture will work in 1.18 2016-06-02
5 Great Powers With the next expansion Great Powers will be introduced 2016-06-09
6 Ruler Personalities The next expansion will introduce character traits to your ruler 2016-06-16
7 The Ottoman Sultanate The Ottomans get some unique flavor in the upcoming expansion 2016-06-23
8 Leader Traits Introduction of traits for land and naval leaders 2016-06-30
9 Coptic Holy Sites A new blessings and holy cities system for Coptics 2016-08-04
10 A Queen Regent Changes to regencies: war declarations and queen regents 2016-08-11
11 Cults Cults are coming to the Fetishists in the next expansion 2016-08-18
12 Subjects Interactions New Military Focuses for Subjects & new Subjects Interface 2016-08-25
13 Prussian Monarchy Prussian Monarchy, Disinherit, Abandon PU, Debase Currency and Strengthen Government 2016-09-01
14 Revolutionary Republics Factions New factions for Revolutionary Republics in the Rights of Man 2016-09-08
15 Bodycount & Minimap Improvement Bodycount screens coming at the end of wars, and you can now see armies on the minimap 2016-09-15
16 1.18 updates older expansions 1.18 brings some overhauls to old expansion features 2016-09-22
17 Balance Changes in Patch 1.18 A look at the most important balance changes with a quick explanation on why they were made 2016-09-27
18 Wrapping Teasers Last 1.18 teasers: an addition to El Dorado, launcher improvements, 20 new achievements and new national ideas 2016-10-04
Patch 1.19 (Denmark)
No. Title and Link Description Date
19 Post Release Evaluation What the team like best with Rights of Man + 1.19 teaser 2016-10-18
20 Denmark 1.19, aka Denmark, brings enhancements to Scandinavian nations and more rules for AI/player replacement (in MP) 2016-10-25
21 Fort Zone of Control Changes to Fort ZoC in 1.19 and some other things 2016-11-01
22 UI Improvements Interface improvements coming in the "Denmark" (1.19) update 2016-11-08
23 New Unit Models for Vanilla Carlos shares the story of how he decided to remake the vanilla unit models 2016-11-15
24 1.19 Beta Feedback We've reverted the Fort Zone of Control changes planned for 1.19 2016-11-22

Mare Nostrum

All developer diaries about the Mare Nostrum expansion, patch 1.16 and patch 1.17.

Patch 1.16
No. Title and Link Description Date
1 Map Changes Map changes in Ireland and Hungary, Culture changes in Europe and Middle East 2016-01-28
2 Naval Reforms Changes to naval aspects (introduction of sailors) 2016-02-04
3 Espionage Rework Spy networks 2016-02-11
4 Africa Rework New nations and ideas in Africa 2016-02-18
5 Territories, States and Corruption Overseas mechanic rework and introduction of Corruption 2016-02-25
6 Trade leagues Trade leagues and changes to mercantilism 2016-03-03
7 Naval missions Three new naval missions and changes in naval combat and naval leader pips 2016-03-10
8 Condottieri Condottieri - rent out armies to other nations 2016-03-17
9 Unconditional Surrender Unconditional surrender and map sharing 2016-03-24
10 Timeline and Achievements Achievements, timeline, Roman Empire formation, new country ideas 2016-03-31
11 Mare Nostrum The goal with Mare Nostrum 2016-04-14
Patch 1.17
No. Title and Link Description Date
12 The Team Meet the team and get some preview information on bugfixing patch 1.17 2016-04-21
13 Espionage 1.17 and changes to espionage ideas and fabricating claims 2016-04-28

The Cossacks

All developer diaries about the The Cossacks expansion, patch 1.14 and patch 1.15.

Patch 1.14
No. Title and Link Description Date
1 A Whole Random New World Announcement of Random New World remake that will be available for all CoP owners. 2015-07-09
2 Future Nation Designer Improvements Upcoming improvements for Nation Designer including option to save a nation template. 2015-08-14
3 Victory Cards Announcement of the new Victory Cards system, which will help to gain score in multiplayer. 2015-08-27
4 Areas and Regions New divisions of the map into areas, regions and super regions. Regional naming for enclaves and overseas areas. Coloring of the wasteland provinces for dominant nations. 2015-09-10
5 Ironman and Achievements Ironman and Achievements Rework, Capital Development Discount, Revanchism 2015-09-17
6 Steppe Hordes Horde Unity, Razing, Tengri, Horde Units, Returning and Selling Provinces 2015-09-24
7 Estates Estates system representing internal politics 2015-10-01
8 Advanced Culture Change, Mercenaries and Naming your Heir Cultures, naming Heirs, Mercenaries and Blocking Canals 2015-10-08
9 Native Policies and Colonial Wars Policies for colonies, colonial wars and the conceding of colonial areas in peace deals 2015-10-15
10 Diplomatic Feedback Provinces of interest, attitude, trust and favors, and calling allies 2015-10-22
11 Convenience and interface improvements Building directly to armies, constructing in subjects, country view improvements, and macrobuilder improvements 2015-10-29
12 Espionage, Spoils of War and Fort's Zone of Control New espionage actions, distribution of spoils of war, changes in fort's zone of control, and permanent claims 2015-11-05
13 Threaten war and grants cores, claims and provinces New diplomatic actions for threatening war and granting land to subjects 2015-11-12
14 New free features Colonial trade goods, Cultural unions, Multiplayer changes and Achievement browser 2015-11-19
15 Random New World II Random New World, Provinces and Scenarios, Dynamic Trade Nodes, Dynamic Naming 2015-11-26
Patch 1.15
No. Title and Link Description Date
16 Paradox Pricing Policy Information about the process used to determine price of expansion 2015-12-03
17 Bugfixing and balance Changes to Estates, Diplomatic feedback and Elective Monarchy 2016-01-07
18 Balance and UI Improvements Changes to Hordes, Spread of Discoveries and UI Improvements 2016-01-14

Common Sense

All developer diaries about the Common Sense expansion, patch 1.12 and patch 1.13.

Patch 1.12
No. Title and Link Description Date
1 Tall and Wide development Province development characteristic (base tax, base manpower, base production) and new building system. 2015-03-27
2 Parliament and English Monarchy New government form called English Monarchy. Parliament a new mechanic for constitutional monarchies and constitutional republics. 2015-04-02
3 Warfare New mechanics for war, including fort overhauls, new looting mechanics, forcelimit changes, and committed armies. 2015-04-09
4 Theocracies and Government Ranks New devotion system, unique mechanic for theocracies. New government ranks affecting government bonuses and national focus. 2015-04-16
5 Free Cities of the HRE Free Cities of the Holy Roman Empire, Remove Electorate, Pause Westernisation, Retire Advisor permanently. 2015-04-23
6 Religions New mechanism for Protestantism and Buddhism religions. 2015-04-30
7 Peace New diplomatic actions, new peace options. 2015-05-07
8 HRE and Achievements Revamped authority and reform mechanics for Holy Roman Empire, new achievements. 2015-05-15
9 Subject Interaction (part 1) New interaction with vassals, marches and personal unions. 2015-05-21
10 Subject Interaction (part 2) New interaction with colonial nations and protectorates. 2015-05-28
11 Technology, Gold, Maps... A bit of everything! Changes to technology, economy, forts and provinces in Europe. 2015-06-04
Patch 1.13
No. Title and Link Description Date
12 Unavoidable Technical Problems Patch notes for 1.12.1 hotfix. Developer explanation of unavoidable technical problems with release major patches. 2015-06-11
13 Mistakes of the Past Descriptions of problems with old features: random new world, hotjoin, high altitude lakes. 2015-06-18
14 National Ideas Addition of several missing national ideas planned for patch 1.13. 2015-06-25
15 Design process Information about how the new features for the game are designed. 2015-07-02
16 Loading Screens List of the existing loading screen, with the announcement of two new ones (Jan Sobieski and Maurice of Nassau). 2015-08-20

Teasers of map changes in patch 1.12.

No. Title and Link Description Date
1 Square no more... Shows the region of Prussia with the not square Memel province. 2015-04-22
2 Local Patriotism New culture split for Italy region. 2015-04-29
3 Balkan Borders Changes in the province borders of the Balkan area. 2015-04-29
4 Frozen Rocks in the Atlantic Sea Tiles changes allowing claims on the Faroe Islands. 2015-05-04
5 Eastern Europe Eastern Europe and Poland. 2015-05-06
6 Germans Map showing all German cultures. 2015-05-13
7 New Revolter Tags Diplomacy Screens of four new revolter tag nations. 2015-05-13
8 Western Mediterranean Changes in the provinces in the Iberia, Italy and North Africa. 2015-05-20
9 Forts Preview Presentation of 3D models that will be used to represent fort buildings. 2015-05-25
10 Trade Routes of Europe Trade map of Europe with few changes to trade nodes. 2015-05-27
11 Mighty Sultanate of Hormuz View of Hormuz with province screen of Yazd. 2015-05-27
12 Something with more Meath on it The Earldom of Meath 2015-05-27
13 Religions of the East New religion setup for the East Asia. 2015-06-03

El Dorado

All developer diaries about the El Dorado expansion, patch 1.10 and patch 1.11.

Patch 1.10
No. Title and Link Description Date
1 Nahuatl, Exploration & Treaty of Tordesillas The mechanics of the new Nahuatl religion, changes to how naval exploration works, and the addition of a system to simulate how the New World was historically divided between Spain and Portugal 2015-01-22
2 The Nation Designer Introduction to the nation designer which enables customized nations. 2015-01-29
3 Inti, Maya and Liberty Desire Introduction to the Inti and Maya religions, and the changes made to liberty desire. 2015-02-05
4 Seven Cities of Gold and Colonial Merchants Changes to land exploration, caravan power - a new mechanic for inland trade and dynamic historical events for South- and Mesoamericans. 2015-02-12
5 Treasure fleets and pirate hunting New treasure fleet mechanic and its associated pirate hunting mechanic, and changes to terrain 2015-02-19
Patch 1.11
No. Title and Link Description Date
6 Dynamic Random Nations teaser Dynamic random nations mode, that creates custom countries instead of using historical ones. 2015-03-04

Art of War

All developer diaries about the Art of War expansion, patch 1.8 and patch 1.9.

Patch 1.8
No. Title and Link Description Date
1 Fleets, Autonomy & India A detailed dev diary of the third major expansion 2014-08-22
2 Marches, Unrest & Persia Second dev diary about vassals, revolts, and Persian map 2014-08-29
3 Military Cooperation, Tradegoods & West Africa Third dev diary about directing allies in war, new trade goods, and West African map changes 2014-09-05
4 Army Builder, Rebel Relocation and China Fourth dev diary about army management, rebels on islands, and East Asian map changes 2014-09-12
5 Diplomacy, Catholics and Southeast Asia & Indonesia Fifth dev diary about diplomacy, revamping the Curia, and map changes to Indochina and Indonesia 2014-09-19
6 Client States, Allied Transports and Central Asia Sixth dev diary about custom client states, allied transports, improved battle displays, and the remapping of Central Asia & Siberia. 2014-09-26
7 Religious Leagues, The Reformation and the Near East Seventh dev diary about the new HRE and reformation mechanics, and map changes in the Near East 2014-10-03
8 Sorties, Terrain and the Maghreb Eighth dev diary about the new sortie and terrain mechanics, abandoning idea groups and cores, the change from a supply-and-demand trade system, and map changes in the Maghreb 2014-10-10
9 Revolutions, 1618 Bookmark and North America Ninth dev diary about the French Revolution and revolutions in other countries, the 30 Years War bookmark, new historical events and the map changes in North America 2014-10-17
10 Achievements, Auto Transport and South America Tenth dev diary about automated fleet transport, miscellaneous mechanics changes, new achievements and the map changes in South America, East Africa and south Russia 2014-10-24
Patch 1.9
No. Title and Link Description Date
11 New Achievements Information about 20 new achievements that will be added in the patch, mostly focusing on countries that currently lack of unique achievements. 2014-11-28
12 Disasters, New Ideas and Other Free Features New disasters system and the idea groups added in the patch. 2014-12-05

List of new national ideagroups in patch 1.8.

No. Nations and Links Date
1 Provence 2014-10-09
2 Mogadishu 2014-10-10
3 Trebizond 2014-10-11
4 Georgia 2014-10-12
5 Majapahit & Sunda, Afghanistan, Wallachia 2014-10-13
6 Croatia, Cyprus, Navarra 2014-10-14
7 Aztecs, Dahomey, Kanem Bornu 2014-10-15
8 Theodoro, Silesia, Danzig 2014-10-16
9 Krakow, Ajuuraan, Ryazan, Tver 2014-10-17
10 Yaroslavl, Pskov, Tarasca 2014-10-18
11 Smolensk, Bosnia, Moldavia, Air 2014-10-19
12 Mossi & Yatenga, Sokoto, Moldavia 2014-10-20
13 Montenegro, Romania, Athens, Gotland 2014-10-21
14 Finland, Albania, Polotsk, Perm 2014-10-22
15 Mughals & Timurids, Ashanti, Mapuche, Inca 2014-10-23
N/A England, Castile, Portugal, Austria (changes) 2014-10-23
16 Chimu, Muisca, Chachapoya, Teutonic Order, Bulgaria 2014-10-24
17 Kiev, Naxos, Tapuia, Pomerania, Kazan 2014-10-25
18 Armenia, Wales, Hausan, Guarani, Charrua 2014-10-26
19 Circassia, Lan Xang, Khiva, Bahmanis, Habsan, Jaunpur, Hamburg 2014-10-27
20 Client State, West African, Andean, Aymaran, Tupi 2014-10-28
21 Ruthenian, Caucasian, Central Indic, Pacific Northwestern, Sumatran, Swahili, Guajiro, Siberian, Mesoamerican 2014-10-29

Res Publica

All developer diaries about the Res Publica immersion pack and patch 1.7.

No. Title and Link Description Date
1 Merchant Republics / National Focus New governmental mechanics 2014-06-26
2 Dutch Republic & Ideas Dutch factions added & 3 new ideagroups 2014-07-03
3 Elective Monarchy & Rivals Elective Monarchy explained & changes to rival mechanics 2014-07-10

Wealth of Nations

All developer diaries about the Wealth of Nations expansion and patch 1.6.

No. Title and Link Description Date
1 General Information Introduction & design goals 2014-03-20
2 Trade Improvements New trade mechanics 2014-03-27
3 Naval Improvement New naval mechanics 2014-04-03
4 Companies and Canals Trade company mechanics & buildable canals 2014-04-10
5 Religion New religion mechanics 2014-04-17
6 Improved Diplomacy New rival system & trade related CBs 2014-04-24
7 Free Features #1 Lots of features expanded in the 1.6 patch 2014-05-06
8 Free Features #2 Interface improvements (esp. Macro Build Interface) 2014-05-08
9 Policies & Ideas & More Policies added & expanded climate mechanics 2014-05-15
10 Balance Changes Changes and improvements to mechanics and balance in 1.6 patch 2014-05-22

Conquest of Paradise

All developer diaries about the Conquest of Paradise expansion, patch 1.4 and patch 1.5.

Patch 1.4
No. Title and Link Description Date
1 Finding Paradise Introduction & design goals 2013-11-04
2 Exploring a new world American continent randomization 2013-11-08
3 The Tribes New North American native countries 2013-11-15
4 American Progression New tech system for Native Americans 2013-11-22
5 A new way of playing Migrations & federations 2013-11-29
6 Colonial nations Semi-independent colonies 2013-12-06
7 Colonial Diplomacy Colonial diplomatic rules 2013-12-13
8 Liberty! Colonial independence mechanics 2013-12-20
9 Random free stuff! Features included with patch 1.4 2014-01-10
Patch 1.5
No. Title and Link Description Date
10 Post Mortem diary Post-release thoughts on CoP 2014-03-03

Base game

All developer diaries about Europa Universalis IV (base game).

No. Title and Link Description Date
0 Our Vision Design goals 2012-08-31
1 The world is at your feet Map of the world: interface consideration for province shapes, projection, colors, terrain, seasons, etc. 2012-09-07
2 The purge & all cards on the table Purging outdated systems and new design ideas 2012-09-14
3 Your envoys are awaiting your orders! Envoys: diplomats, missionaries, merchants and colonists 2012-09-21
4 Your Economy is about to change Income, expenses, stability, no "minting" (as in EUIII), Loans 2012-09-28
N/A The 3 tiers... Discussion of the different tiers of countries, and a listing of which countries fall into each tier; the tier of the country determines the amount of developer focus on national events, features and mechanics. 2012-10-03
5 The Return of the Kings Rulers, monarchs and power, heirs, advisors 2012-10-04
6 Do you have any idea about it? Idea groups, national ideas, and ideas interface 2012-10-12
7 And did those feet in ancient time.... England and dynamic historical events: War of the Roses and English Civil War, War of Captain Jenkin's Ear and The Muscovy Trade Company; plus national ideas, missions and decisions 2012-10-19
8 With God on Your Side? Religion: unique abilities for Catholic, Orthodox, Sunni & Shia, religious unity now visible, and new religion interface 2012-10-26
9 It's a rich man's world... Trade system: trade nodes, merchants, trade power, trade mission, supply and demand, trade efficiency, trade range, trade steering, trade income, and mercantilism 2012-11-02
10 It all belongs to Mother Russia... Russia: strategic possibilities, dynamic historical events (Time of Troubles, Grand Embassy for westernization), missions and decisions, national ideas; army tradition and navy tradition changes 2012-11-09
11 The Cost & Reward for Technology Technology investment and cost, administrative, diplomatic and military technologies defined. Plus a related video developer diary. 2012-11-16
12 Dominium Maris Baltici Sweden: strategic possibilities, dynamic historical events (The Dacke Feud and French Wars of Religion), missions, decisions, national ideas; plus stability changes from EUIII 2012-11-23
13 FREEEDOM! Rebels, their causes and mitigation: stability, government types, war exhaustion, and overextension 2012-11-30
14 Nobody expects the... Spain: strategic possibilities, events, missions, decisions, and national ideas; plus details on cultural conversion. 2012-12-07
15 Et tu Brute? Milan: strategic possibilities, dynamic historical events (Ambrosian Republic, national ideas, and republican tradition as an analogous mechanism for legitimacy for monarchies 2012-12-14
16 Vive la France! France: strategic possibilities, national missions, decisions and ideas; also brief notes on harsh treatment to curtail revolts and army morale recovery. 2013-01-11
17 Honey, don't you want to talk about it? Diplomacy: new diplomatic interface, opinions and rivals 2013-01-18
18 Sail away with me! Portugal: events, missions, decisions, ideas, and a detail on colonization 2013-01-25
18 Part II - Colonisation Clarification Colonization 2013-01-26
19 War has never been so much fun... Shattering armies, disorganization, combat interface, combat width, flanking, supply limits, attrition, manpower, reinforcement changes, maintenance cost increases. Plus a video: the World Map Trailer. 2013-02-08
20 A Tale of Two Cities The republics of Venice, Genoa, and a link to a video interview of Thomas "Besuchov" Johansson, project lead at Europa Universalis IV. 2013-02-15
21 Leaders & Mercenaries Land units, naval units, leaders, mercenaries; plus a link to an article at Strategy Informer: Paradox Hands-On Special: Master Class 2013-03-01
22 A.E.I.O.U Austria: strategic possibilities, dynamic historical events (The Italian Wars, Privilegium Maius), missions, decisions and national ideas; plus Holy Roman Empire improvements (diplomacy, reforms, elections and wars within the empire) 2013-03-08
23 Tell me sweet little lies... Coalitions, relations (improve relations and insults, overextension and coring provinces. 2013-03-15
24 Heir of Rome Ottoman Empire: strategic possibilities, events (including a series of events for the provincial system and the Janissaries), national ideas; plus a feature on Westernization 2013-03-22
25 Anna Karenina Wargoals, peace options, peace interface; plus April Fool's: "EUIV, The Musical!" (songs to download and a video) 2013-04-05
26 A smoke and a pancake? A look at Burgundy and the Low Countries 2013-04-11
27 An offer you can't refuse Spy ideas and diplomatic covert actions: fabricate claim, infiltrate administration, sow discontent, sabotage reputation, support rebels, and changes to rebels. 2013-04-18
28 A Kinderegg! Three in one! Scotland, The Hansa, and the Reformation 2013-04-26
29 For the Horde! Province interface and the Hordes of Central Asia: Steppe Nomad government type, separate technology group, automatic casus belli against neighbors, 50% damage modifier for fighting on plains and grasslands terrain and, aside from the Timurids, a set of national ideas; video link to the call to arms 2013-05-03
30 Four more countries and even more... The Mamelukes, Persia, Timurids, Oman; video link to the call to arms. 2013-05-10
31 A Point of Honor Japan: Daimyos and the Shogunate, unification, events, ideas; plus a discussion of the new scoring system. Plus links to the call to arms and to download the songs of the EUIV musical. 2013-05-17
32 The more the merrier! Multiplayer changes, including new networking code, hotjoining, matchmaking, standalone servers, improved chat, and AI takeover (of players who drop out). There is also a video link to the "EUIV musical" "Casus Belli". 2013-05-24
33 Go East! Ming China: The Mandate of Heaven, faction system, national events and ideas; plus debts and loans. Link to the Casus Belli music video. 2013-05-31
34 Unit interfaces and more Changes to unitview, and the need for military power (MP) for special actions. Also a note on forced march and Berber culture national ideas. 2013-06-07
35 Alt for Norge! Denmark, Norway, and a brief look at sieges 2013-06-14
36 Hot States in the Holy Roman Empire Quick look at the start positions and national ideas of Brandenburg, Bavaria, and Bohemia. 2013-06-20
37 Aragon, Naples and Korea National ideas for Aragon, Naples and Korea 2013-06-28
38 Ayutthaya, Viyanagar & Muslim Sultanates A look at the national ideas major powers in the Indian subcontinent: Ayutthaya, Viyanagar and the Indian Sultanates. 2013-07-05
39 Divine Tactics Fleet basing rights, enforce peace, and Christian Theocracies 2013-07-12
40 What is our mission? Missions, decisions, achievements and Ironman mode. Plus links to the initial videos of an England game play-through by Quill18. 2013-07-19
41 What we all waited for! National ideas of central Europe: Poland, Lithuania, Hungary 2013-07-26
42 The Crusader Kings II Converter Article and video developer diary of how the Europa Universalis 4 Save Converter DLC will work. Saved games will be brought in as a mod. 2013-07-31
43 Artificially Improved Changes to the Artificial Intelligence (AI), detailing how it makes decisions based on its attitudes for alliances and coalitions, and how it handles its armies in wartime. There is also a brief look at how AI difficulty and handicapping can be set. 2013-08-01
44 Newbie Friendly Describes changes to the ledger, hints system, production interface, tutorial 2013-08-01
45 A very small development diary Demo will be released by the end of the week (10 August 2013); the game will be released on 13 August 2013 at 9 AM Eastern Standard Time (3 PM Swedish time). 2013-08-05


Developer video diaries and developer's let's play sessions on the various expansions.

No. Title and Link Description Date
1 Developer Walkthrough Thomas Johansson, project lead for Europa Universalis IV shows off this new game from Paradox Interactive. 2012-11-09
2 Technology changes shown off. 2013-02-13
3 Religion delved into in detail 2013-07-01
4 Exploration developer diary from Thomas Johansson about how to colonize as an option for more nimble powers. 2013-07-15
5 Warfare Project Lead Thomas Johansson describes the nuances of war strategy. A Guide to Conquering Nations the Old-fashioned Way. 2013-07-25
6 Converter Tool Highlights How the Crusader Kings II-to-EUIV converter DLC will work. Saved games will be brought in as a mod. 2013-07-31
7 Conquest of Paradise Livestream Highlights Project Lead Thomas sits down with Matt to discus the first expansion for Europa Universalis IV. 2013-11-08
8 Conquest of Paradise - Native Americans Studio Manager Johan Andersson speaks about the new features in the upcoming expansion, Conquest of Paradise. This DD focuses on the expanded gameplay and mechanics for the Native American tribes, including new nations, unique buildings, and nomadic peoples 2013-12-12
9 The History of Historical Strategy Highlighting the studio's humble beginnings with its adaptation of Europa Universalis from the tabletop to the desktop, this short film goes on to examine the team responsible for such titles as the Hearts of Iron and Crusader Kings series. Games both old and new are shared from the designers' perspective, including a look at what's next for Paradox Development Studio -- their first RPG, Runemaster. 2014-04-30
10 Europa Universalis IV: Wealth of Nations Video Developer Diary #1 Project Lead Thomas Johansson talk about the features of the upcoming Europa Universalis IV-expansion "Wealth of Nations", which focuses on trade and how to make the wealth of the world flow into your coffers. 2014-05-16
11 Paradox Live 0010 - The Art of War Europa Universalis IV, The Art of War is coming, lets sit down with Martin and talk about it. 2014-09-13
12 The Art of War - Feature Highlights We sat down with Wiz to talk about the upcoming expansion for Europa Universalis IV, The Art of War. 2014-09-23
13 Europa Universalis IV: Art of War Video Developer Diary Martin "Wiz" Anward, Project Lead for Europa Universalis IV, explains some of the new tools available to players as they march to war. Learn about new diplomatic options, the new powers of rebels and other notable changes. 2014-10-10
14 The Art of War - Features 2 Highlights There's smoke on the horizon, war is brewing. So here's the highlights for the Art of War to get you up to speed on the mechanics in this expansion. 2014-10-20
15 The Art of War - Feature 3 Highlights We needed to do a third feature presentation for the Art of War to cover the final bits that we needed to cover. 2014-10-29
16 Paradox Live 0017 - A reply to Arumba Earlier this week, Arumba posted a video about how to improve Europa Universalis IV in twelve minor ways. The video can be found here: https://www.youtube.com/watch?v=xAHCRTSGdLw 2014-11-27
17 Paradox Live 0018 - EUIV Patch 1.9 and free features We're working on the 1.9 patch for EUIV, this patch includes both bug fixes and a content update. 2014-12-04
18 El Dorado - Feature Spotlight Project Lead Martin Anward describes the new mechanics for Central and South American native states, including three new religions that promise to challenge even the most experienced desktop monarchs. Anward also goes into great detail on the Nation Designer and alternate starting maps that will be available for the first time in Europa Universalis IV: El Dorado. 2015-02-24
19 Common Sense - Feature Spotlight In this video, Project Lead Martin Anward gives us his insights of the expansion. 2015-06-04
20 Cossacks - Feature Spotlight Paradox Walks You Through Major Improvements 2015-11-24
21 Mare Nostrum #1 - Map Changes & Trade Leagues DDRJake and BjörnB cover some of the new content in Mare Nostrum 2016-03-08
22 Mare Nostrum #2 - New Ideas & Timeline DDRJake and BjörnB cover some of the new content in Mare Nostrum 2016-03-15
23 Mare Nostrum #3 - Condottieri DDRJake covers some of the new content in Mare Nostrum 2016-03-22
24 Mare Nostrum - Feature Spotlight Johan Andersson goes over the features in the coming EU4 expansion, Mare Nostrum 2016-03-23
25 Mare Nostrum #4 - Kuba Luba DDRJake and BjörnB play-test Mare Nostrum as Luba in the new regions added to Africa 2016-03-29
26 Mare Nostrum #5 - Countdown to Launch DDRJake play-tests some of the new content in Mare Nostrum just before release 2016-04-05
27 Rights of Man #1 - Reveal Stream Johan Andersson and cKnoor reveal the next expansion for EU4 at GamesCom 2016-08-19
28 Rights of Man #2 - Institutions, Tech & more Johan Andersson and DDRJake on the overhauled technology system in EU4 2016-08-31
29 Rights of Man #3 - Queens, Regencies & more DDRJake expands on queens and reworked regency system 2016-09-07
30 Rights of Man #4 - Great Powers, Subjects & more DDRJake explains advantages of being a great power and improvements to subjects 2016-09-14
31 Rights of Man #5 - Leader traits, Copts & more Johan Andersson and DDRJake on military traits and unique co-op like mechanics for Coptic religion 2016-09-21
32 Rights of Man - Feature Spotlight Johan Andersson goes over the features in the coming EU4 expansion, Rights of Man 2016-10-07
33 Mandate of Heaven #1 - Empire of China, Tributaries & Manchu Banners DDRJake goes over the China region and the new mechanics added there 2017-03-14
34 Mandate of Heaven #2 - Ages DDRJake and Johan Andersson and the separation of time in EU4 1.20 2017-03-21
35 Mandate of Heaven #3 - Diplomatic Macro-Builder DDRJake on the Quality of life improvement that is the Diplomatic Macro-Builder 2017-03-24
36 Mandate of Heaven #4 - Japan DDRJake goes over the mechanic changes done in the Japanese region 2017-03-28
37 Mandate of Heaven - Feature Spotlight Jake Leiper goes over the features in the coming EU4 expansion, Mandate of Heaven 2017-03-30
38 Third Rome - Feature Stream Jake demonstrates the features in the upcoming EU4 immersion pack, Third Rome 2017-05-30
39 Cradle of Civilization - Feature Spotlight Jake Leiper details the features in the upcoming Cradle of Civilization expansion and the 1.23 Persia update 2017-10-24
40 Rule Britannia - First Look Jake Leiper with a first look at EU4's Rule Britannia immersion pack and the 1.25 England update 2018-02-06
41 Rule Britannia - What's New? Jake Leiper with more details on the upcoming features of Rule Britannia and the 1.25 England patch 2018-02-27
42 PDXCon 2018 - Past, Present, and Future of EU4 Jake Leiper-Ritchie, Game Director of EU4, talks about the Past, the Present, and the Future of EU4. 2018-05-20
43 Dharma - Feature Spotlight Jake Leiper goes over the new features and changes coming in the Dharma expansion and the 1.26 Mughals update 2018-09-04