Dan Koppel - is a video game designer. Dan Koppel began his career in 2004 and has worked for companies such as Gray Matter Interactive, Activison, Aspyr, MediaQuest Holdings, Treyarch, Activision Blizzard and Konami. Dan Koppel's first game was Call of Duty: United Offensive which was released 20 years ago. Best Game Dan Koppel contributed to was Call of Duty: United Offensive. Dan Koppel's latest work is Call of Duty 2: Big Red One which was released 19 years ago.