Mod «Hearts of Iron IV: Era of Discovery» for Hearts of Iron 4 (v1.12.5)

Hearts of Iron IV: Era of Discovery

Welcome to the official alpha of the Hearts of Iron IV: Era of Discovery Mod!

Era of Discovery is a Historical mod set in the years 1494-1560 with at first a start date from 1550-1560 and then we will later make earlier start dates focusing on different points within the Italian Wars.The mod is to encompass the historical events in the latter half of the 16th century like the Protestant Reformation, Italian Wars, and Wars of Religion. We will then focus on colonization in the Americas and Africa as well as Asia.

The mod is currently in its alpha 0.1 stage, so that means there is still a lot of stuff that remains incomplete. The mod should still be enjoyable at this point. Current features include:

  • 1550, 1493, 1510, 1525 start date and realistic populations
  • A focus tree for the major nations: France, Spain, Austria (WIP), England, Scotland, Russia, Papal States, and the Ottoman Empire.
  • Work in progress focus trees include Portugal, Savoy, Brandenburg, and Poland.
  • Custom Leaders, nations, and generals like Charles III, Duke of Lorraine and Albert I, Duke of Holstein.
  • A plethora of events.
  • Custom ideologies and estate interactions.
  • Custom icons, fitting more with the 16th century feel.
  • Reworked states.
  • Colonization mechanics and technology.
  • Custom Economy mechanics based on Europa Universalis IV.

This project is still in early development, so there will be steady regular updates of things that need to be added. Currently things that are planned:

  • Finish the work in progress focus trees.
  • More focus trees.
  • More events.
  • Limited rework of technology
  • custom skins for troops in the major countries.
  • Addition of Landmarks like Palace of Westminster, Louvre, Saint Peter's Basilica, and Hagia Sofia.
  • rebalanced England and Scotland's stability issues and war support
  • fixed the scripted peace deals for France and Spain
  • made transports for naval invasion researched at the beginning of the game

Version 10.10.22 for Hearts of Iron 4 (v1.12.3)

  • Updated to new Blood Alone DLC content


Version 24.09.22 for Hearts of Iron 4 (v1.11.13)

  • adding more effects for the Austria and Spain focus trees to allow it to be more playable.
  • minor fix of the France focus tree


Version 12.09.22 for Hearts of Iron 4 (v1.11.13)

  • updated ship modules to be put into production at the start of the game
  • fixed the first first tier researchable equipment already in game.
  • fixed other minor bug fixes


Version 21.08.22 for Hearts of Iron 4 (v1.11.12)

Bug fixes:

  • fixed the trains in the game
  • added effects to the Spanish Treasure fleet decision
  • rebalanced cavalry equipment
  • fixed the map of Austria


  • buffed Scotland and Austria
  • added more advisors for 1493, 1510, and 1525 start dates


Version 05.08.22 for Hearts of Iron 4 (v1.11.12)

Bug Fixes

  • fixed supply issues and added trains
  • rebalanced division equipment

New Additions

  • Added 1493, 1510, 1525 start dates with borders, leader portraits, military commanders, national spirtits, and advisors.
  • Only 1550 start date is currently playable. The rest are WIP.
  • added historically accurate religion map for all four start dates


Version 01.07.22 for Hearts of Iron 4 (v1.11.12)

  • added Historical populations
  • discarded the distance limit to colonize
  • added experience modifiers to advisors
  • added a comprehensive historically accurate religion mapmode


Version 12.05.22 for Hearts of Iron 4 (v1.11.10)

  • Bugfixes


Version 08.05.22 for Hearts of Iron 4 (v1.11.10)


File info

  • Added by: TOP-Mods
  • Author: Louis XIV
  • Mod version: 10.11.22
  • File format: ZIP
  • File size: 287.4 mb
  • Source: Go to
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Can you please add this only two digit mb, cant download with workshop now or the old workshop site : *Reworked Qing (Great War Redux Submod) v2.0


the mod doesnt work can you please fix it