In this update3
Full notes
Full Hearts of Iron IV update
Read the full published notes in a cleaner layout. The original post stays linked below.
What changed
- Gameplay
- UI and audio
- Balance
- Performance
- Maps
Hi again,
Today’s Dev Corner is a bit different from the previous ones in that it is not about presenting new ideas, thoughts or concepts. Instead it ties together the East Asia arc we are currently building, and how the features we have already discussed fit that arc.
If you have been following along these corners, you’ve noticed that the countries we have revealed so far are; Japan, the Philippines, the People’s Republic of China, and Nationalist China. The pillars we have shown are changes to the naval gameplay, faction dynamics, and coal and energy.
As we have said numerous times - what we have talked about is very much work in progress, and numbers and UI are subject to change. And as always, your feedback shapes what stays and what goes. But back to the arc:
The Regional Narrative: Japan invades China, the Pacific reacts
We start from a concrete situation. Japan pushes into China, which stresses industry and supply on the mainland, pulls the Pacific into a contest over island chains and shipping lanes, and forces factions to define who they are and what they will tolerate. From that narrative, a few design aims follow. [olist]
Industry tempo must be a strategic choice, not a foregone conclusion. Coal produces Energy that powers civilian, military, and dockyard output along a base to fully powered scale. Economic laws now affect energy consumption, so pushing mobilization has a cost, while demobilizing at the right moment can be the better play. The goal is to give you levers that tie mainland campaigns, maritime buildup, and home front politics into one readable economy without adding bookkeeping.
Sea control must matter at the right places and at the right times. This is why we are reshaping Naval Dominance. Dominance accumulates rather than flickering on and off, thresholds vary by sea type, and control brings tangible benefits such as fewer convoys along secure routes. The reintroduced Home Base system ties range and supply to where fleets are staged, and island categories create sensible caps so not every dot in the ocean can host a mega base. All of that supports a Pacific that moves with readable momentum.
Factions must act to their own doctrine, not just their ideology tag. Faction Manifestos set long term purpose, Goals push concrete actions, Rules define who can join and how members behave, and Initiatives earned from goals let leaders evolve the faction. This turns the political layer into a set of strategic commitments that you feel on the map.
Martial Virtues are an important part of society and shape the nature of warfare. In both Japan, and in China various aspects of martial virtue are an important part of forming the society in this era and the shape of the war.This is perhaps mainly prevalent in how the country content has been constructed, but is also an important part of the other features we have been working on. [/olist]
Why this matters for East Asia
Mainland tempo and energy choices
On the mainland, the pace of operations in China is tied to Energy. A country that secures coal and manages law driven consumption hits production targets earlier, but risks overextension elsewhere. A country that delays can stay flexible, but pays with slower force build up. Because output scales with the Energy ratio between base and fully powered, you see results quickly enough to learn and adjust mid campaign. Japan will need to go hunting for resources and coal in
Source
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