Hearts of Iron IV is a grand sand box strategy video game which is published by Paradox Interactive at 6 June 2016. Game allows players to do political and millitary decisions in WW2 era. Co... Read allHearts of Iron IV is a grand sand box strategy video game which is published by Paradox Interactive at 6 June 2016. Game allows players to do political and millitary decisions in WW2 era. Compatible to Microsoft Windows, OS X and Linux.Hearts of Iron IV is a grand sand box strategy video game which is published by Paradox Interactive at 6 June 2016. Game allows players to do political and millitary decisions in WW2 era. Compatible to Microsoft Windows, OS X and Linux.