Harro Grönberg - is a video game producer. Harro Grönberg began his career in 2009 and has worked for companies such as Rovio Mobile, Rovio Entertainment and Chillingo. Harro Grönberg's first game was Angry Birds which was released 14 years ago. Best Game Harro Grönberg contributed to was Angry Birds. Harro Grönberg's latest work is Angry Birds which was released 14 years ago.