It’s hard, rewarding and a ton of fun.įull disclosure - I had never played a Paradox game until now. The game asks players to take charge of a country during the 1930s and ’40s and steer it to success during the bloodiest era in world history. Hearts of Iron IV is a big, crazy World War II simulator. Digital storefront Steam calls it a strategy game. Hearts of Iron IV is the newest installment in Paradox Interactive’s long-running wargame series.