Before working on Call of Duty: Modern Warfare 3 and now Call of Duty: Advanced Warfare, Sledgehammer Games was creating a third-person project in the blockbuster franchise.

Sledgehammer co-founder Glen Schofield told Game Informer (which has a cover story on Call of Duty: Advanced Warfare) that the studio was about six to eight months into the third-person Call of Duty project, which was set during the Vietnam War. "... We were really getting into the story," Schofield said. "We had a big moment that I would love to get into a game someday, but it's not something we could do in first-person."

Regarding the project's setting, Schofield said that while everyone only thinks about Vietnam regarding the 1960s and '70s war, it was in Cambodia and Laos as well. "We did a lot of research on that war," explained Schofield, who helped create Dead Space. "... We were definitely going for some Dead Space moments. It was going to be a fresh take on war, that's for sure."

Ultimately, about 15 minutes of the third-person Call of Duty project were playable after a half-year of development, and that's when Activision asked Sledgehammer if it was interested in helping out with Call of Duty: Modern Warfare 3. The rest — as they say — is history.

Call of Duty: Advanced Warfare is Sledgehammer's first solo project in the FPS series, and it's slated for a November 4 release on PC, PlayStation 3, PlayStation 4, Xbox 360, and Xbox One.

http://www.ign.com/articles/2014/05/05/sledgehammer-developed-a-third-person-vietnam-war-call-of-duty-demo?abthid=5367f65365c8ceee49000023