Call of Duty: Vietnam

Call of Duty: Vietnam is a cancelled installment of the Call of Duty Series that was under development by Sledgehammer Games. It was stated to be taking place in not only the 1960s and 1970s but also in Cambodia and Lais as well.

The game was planned to be in the action/adventure genre and would've been the first third-person only Call of Duty game. In September 2010, Activision realized the community wanted another Modern Warfare game, or another game developed by Infinity Ward. In January 2011, it was confirmed the action-adventure game would be cancelled, or simply put on hold, and instead Sledgehammer Games helped Infinity Ward with Modern Warfare 3 Glen Schofield referred to the game as "most likely cancelled" when interviewed in October 2011.

Sledgehammer went on to develop ''Call of Duty: Advanced Warfare, confirming the game's cancellation. During an interview with Glen Schofield in May, 2014, he revealed more information on the cancelled project and what the studio had been working on.