Staffan Berglén - is a video game producer. Staffan Berglén began his career in 2016 and has worked for companies such as Paradox Development Studio and Paradox Interactive. Staffan Berglén's first game was Hearts of Iron IV which was released 7 years ago. Best Game Staffan Berglén contributed to was Hearts of Iron IV. Staffan Berglén's latest work is Hearts of Iron IV which was released 7 years ago.