These modifications include mod, which adds an espionage system to the game or allows you to move the capital of your state. Some Hearts of Iron 4 mods change or improve certain gameplay moments. And some of them are not enough - a huge number of mods have been created for the game that changes the duration of the action, the scenario. But the fourth part showed us a huge number of other options. The most popular was the second part, where troops from Germany, the USA, and the Union help to conquer the world. Therefore, it is not surprising that HoI has become one of the most beloved games in the entire world. Many players love alternative history and strategies. Unlike previous versions, the fourth part boasts really 'smart' artificial intelligence, which makes the game more exciting and interesting. Hearts of Iron 4 is a WW2 global strategy game from Paradox.