Theater Pack - Hearts of Iron IV: Thunder at our Gates
Thunder at Our Gates is a Theater Pack DLC for Hearts of Iron IV that expands command and national options. It introduces Military HQs to position and support generals, Ship Captains who gain skills and can be promoted to admirals, and three full national focus trees for Australia, Siam and Indonesia. The pack was developed by Paradox Development Studio and published by Paradox Interactive, released on Jun 11, 2026. It is listed for Windows, macOS and Linux and includes interface translations across ten languages. Windows minimum and recommended system specifications are provided for players.
Features
Military HQs
Deploy generals to local Military HQs to affect nearby units, use updated command abilities and take advantage of division design synergies and proximity bonuses.
Ship Captains
Named captains lead individual ships, earn skills through service and can be promoted to admirals to command larger fleets.
Australia Focus Tree
A new national tree for Australia with options to support Allies in the Pacific, resist Japanese advances, or pursue different domestic political directions.
Siam Focus Tree
Siam's focus tree offers routes to exploit great power rivalries, influence neighboring states and expand authority in Southeast Asia.
Indonesia Focus Tree
Indonesia's tree presents choices to remain under Dutch rule, pursue independence alone, or align under a new patron to shape the nation's future.
Multiplayer and Steam features
The pack is released as downloadable content and supports single-player, co-op and cross-platform multiplayer; Steam features include achievements, trading cards, Workshop and cloud support.
Quick Facts
Frequently Asked Questions
What does this Theater Pack add to Hearts of Iron IV?
It adds new command systems—Military HQs and Ship Captains—and three national focus trees for Australia, Siam and Indonesia, expanding strategic and regional play.
Which nations receive new focus trees?
The DLC includes dedicated national focus trees for Australia, Siam and Indonesia, each with unique political and strategic choices specific to those countries.
How do Military HQs and Ship Captains work?
Military HQs let you deploy generals to local command with synergies from command abilities, proximity and updated division design. Ship Captains are named officers who earn skills and can be promoted to admirals to lead fleets.
What platforms and languages are supported?
The pack is listed for Windows, macOS and Linux. Interface translations are provided for English, French, German, Polish, Portuguese (Brazil), Russian, Spanish (Spain), Japanese, Simplified Chinese and Korean; full audio and subtitles are not included for these languages.
What are the system requirements and review information?
Windows minimum and recommended specifications are provided with the release (minimum: Intel i5 750/AMD FX 4300, 4 GB RAM; recommended: Intel i5 2500K/AMD Ryzen 3 2200G, 6 GB RAM). The store lists 38 reviews with a positive rate of 55%.
Genres
Tags
System Requirements
Minimum
Os
Windows® 10 Home 64 Bit
Memory
4 GB RAM
Storage
2 GB available space
Graphics
Nvidia® GeForce™ GTX 470 (1.28GB) | AMD® HD 5850 (1GB) | Intel Iris Xe G7 (Tiger Lake) | AMD® Radeon™ RX Vega 11
Requires
Processor
Intel® Core™ i5 750 | AMD® FX 4300
Recommended
Os
Windows® 10 Home 64 bit
Memory
6 GB RAM
Storage
2 GB available space
Graphics
Nvidia® GeForce™ GTX 570 (1.28GB) | AMD® Radeon™ HD 7970 (3GB) | Intel Iris Xe G7 (Tiger Lake)
Requires
Processor
Intel® Core™ i5 2500K | AMD® Ryzen 3 2200G
Supported Languages
| Language | Interface | Subtitles | Audio |
|---|---|---|---|
| English | |||
| French | |||
| German | |||
| Polish | |||
| Portuguese - Brazil | |||
| Russian | |||
| Spanish - Spain | |||
| Japanese | |||
| Simplified Chinese | |||
| Korean |