Harry Callaghan - is a video game composer. Harry Callaghan began his career in 2015 and has worked for companies such as Prism Studios. Harry Callaghan's first game was Portal Stories: Mel which was released 8 years ago. Best Game Harry Callaghan contributed to was Portal Stories: Mel. Harry Callaghan's latest work is Portal Stories: Mel which was released 8 years ago.