Christian Busic - is a video game designer. Christian Busic began his career in 2005 and has worked for companies such as Treyarch, Gray Matter Interactive, Activision Blizzard, Activison and Konami. Christian Busic's first game was Call of Duty 2: Big Red One which was released 18 years ago. Best Game Christian Busic contributed to was Call of Duty 2: Big Red One. Christian Busic's latest work is Call of Duty 2: Big Red One which was released 18 years ago.