Walter Christian Mair - is a video game composer. Walter Christian Mair began his career in 2013 and has worked for companies such as Guerrilla Games and Sony Computer Entertainment. Walter Christian Mair's first game was Killzone: Mercenary which was released 10 years ago. Best Game Walter Christian Mair contributed to was Killzone: Mercenary. Walter Christian Mair's latest work is Killzone: Mercenary which was released 10 years ago.