Mattias Häggström Gerdt - is a video game composer. Mattias Häggström Gerdt began his career in 2012 and has worked for companies such as Storm8 Studios and Sauropod Studio. Mattias Häggström Gerdt's first game was Castle Story which was released 11 years ago. Best Game Mattias Häggström Gerdt contributed to was Castle Story. Mattias Häggström Gerdt's latest work is Castle Story which was released 11 years ago.