What was the latest Hearts of Iron IV update?

The latest Hearts of Iron IV update is "HOI IV - Open Beta", released on Mar 20, 2026. It is rated 4/5 (Significant) impact.

How often does Hearts of Iron IV get updated?

Hearts of Iron IV receives updates approximately every 14 days.

Where can I find Hearts of Iron IV patch notes?

You can find all Hearts of Iron IV patch notes, changelogs, and updates at patched.gg/games/hearts-of-iron-iv. Each update includes an AI-generated summary, impact rating, and key changes. Official patch notes are published at https://store.steampowered.com/news/app/394360.

Hearts of Iron IV

Paradox Development Studio / Paradox Interactive

Strategy

A World War II grand strategy game where players take command of any nation and manage military operations, production, and diplomacy.

Patch History (9)

4/5 Significant1d ago

HOI IV - Open Beta

Major naval overhaul reduces manpower requirements for most ships and shifts resource costs from modules to hulls.

1/5 Trivial2d ago

Warships of the Pacific - Hotfix, 1.17.5.1

Fixed nation-specific infantry 3D models displaying as generic and corrected M24 Chaffee model ordering for US Great War tanks.

4/5 Significant4d ago

Warships of the Pacific Available NOW!

Warships of the Pacific introduces 30 new naval models and icons alongside a major UI overhaul for the equipment selector and significant balance buffs for France and the USA.

4/5 Significant5d ago

Warships of the Pacific - Patch Notes, 1.17.5

Warships of the Pacific introduces new naval designs for the USA, UK, and Japan, alongside a major AI overhaul for Pacific theater strategy and faction influence rebalancing.

2/5 Minor3w ago

Mod Update Warships of the Pacific

Hearts of Iron IV updates the 3D model selector for equipment and division designers, introducing breaking changes for modders' camera settings.

2/5 Minor3w ago

(Very small) Hotfix - Patch 1.17.4.1

Research Bonuses no longer stack infinitely after a critical fix ensures they are properly consumed upon use.

3/5 ModerateFeb 19, 2026

No Compromise, No Surrender | Patch 1.17.4

Soviet Union receives major focus tree buffs and tech requirement reductions alongside a comprehensive overhaul of Naval AI and Air-to-Ground combat damage.

3/5 ModerateFeb 11, 2026

No Compromise, No Surrender - 1.17.4 Open Beta Client Update

Soviet mastery gain is significantly buffed while CAS damage is reduced to prevent it from being overpowered.

4/5 SignificantFeb 2, 2026

No Compromise, No Surrender - 1.17.4 Open Beta

Soviet Union land mastery and global organization gain nerfed alongside massive content expansions for Iraq, Turkey, and Chinese Warlords.

Quick Stats

Total updates: 9
Last update: 1d ago
Platforms: pc, mac

Official Source

View official patch notes