Due out in a few hours (as of the time of this post). I know HOI has a mixed response here but I'm personally looking forward to it.
Some of the new features include Military Industrial Organizations (Design Groups) for research/production like Lockheed, Supermarine etc. a World Market for selling arms and expanded and overhauled Support Companies/Battalions.
Full list here:
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# Arms Against Tyranny
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- Added ahistorical Finnish focus tree paths
- Added full Norwegian focus tree
- Added full Swedish focus tree
- Added full Danish focus tree
- Added a full ... other focus tree
- Replaced equipment design company ideas with Military Industrial Organizations (MIOs). MIOs can be attached to research and production, gaining funds and unlocking increased benefits upon your production and equipment.
- Diplomacy tab replaced by the International Market. Equipment can be bought and sold for civilian factory output, giving countries a way of arming themselves with advanced equipment, or war-profiteering for their own gain. Diplomacy menu can be accessed via a button at the bottom of the international market
- Added Special Forces doctrine page, with branches including unique gameplay utility for Mountaineers, Marines, and Paratroopers, and 3 new support battalions
- Added numerous new 3D models including snowmobiles, cold-weather infantry, and a reindeer for some reason
- Added many new music tracks for Nordic countries, as well as several main game themes
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# Feature
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- Land trade routes are now shown on the map. Trade Embargo action now prevents land-based trade from passing through a country if they are embargoing the final recipient.
- Land Doctrines now contain a variety of bonuses to specific support battalions which enchance the capabilities of other battalion categories in their division
- Added support for historical tank templates in the tank designer, accessed from tank chassis blueprints
- Added a new focus for Germany that gives Germany resource rights for Västerbotten, and Industry for Sweden
- Added modding and script support for 'joint' national focuses, allowing several countries to progress in the same shared focus branch
- Added Finnish historical focus tree paths
https://store.steampowered.com/app/2183930/Expansion__Hearts_of_Iron_IV_Arms_Against_Tyranny/
I've always been a sucker for the DLC, and I will open my wallet once again for this one.
But I have to admit that the list of changes doesn't really excite me much this time.
Just a tip as it's not obvious how to use them at first- Marine Commandos. They can exfiltrate from any non-port region as long as you control + click a Port they retreat to.