Ryan Feltrin - is a video game programmer. Ryan Feltrin began his career in 2004 and has worked for companies such as Gray Matter Interactive, Activison, Aspyr and MediaQuest Holdings. Ryan Feltrin's first game was Call of Duty: United Offensive which was released 17 years ago. Best Game Ryan Feltrin contributed to was Call of Duty: United Offensive. Ryan Feltrin's latest work is Call of Duty: United Offensive which was released 17 years ago.