: A new mechanic allowing nations to license military technology from more advanced powers or sell their own designs for a profit.
: Updated screens to provide more detailed data on casualties, industry, and convoy usage. Hearts of Iron IV Death or Dishonor v1.4.2
: New impassable terrain, such as the Sahara Desert, changed how warfare is conducted in North Africa. : A new mechanic allowing nations to license
: Dedicated, deep-branching focus trees for Hungary, Romania, Czechoslovakia, and Yugoslavia . These allow players to navigate historical tensions or pursue alternate histories, such as reviving the Austro-Hungarian Empire as Hungary. such as the Sahara Desert
The free 1.4 update, which accompanied the DLC, brought several major base-game overhauls:
: New levels of puppetry and autonomy specifically for fascist regimes. Changes in Version 1.4 "Oak"