Sledgehammer Games’ unreleased, third-person Call of Duty game was internally titled Fog of War, the developer told IGN.

Set against a horrific Vietnam War backdrop , Fog of War was conceived as “Call of Duty with the play style of Uncharted,” Sledgehammer’s Michael Condrey told IGN. “It was really taking our passion for Call of Duty with our experience and expertise from Dead Space and bringing that together to offer fans a new Call of Duty way to play.”Condrey explained that returning to Fog of War is still possible. “In our hearts, there’s probably a place for that game,” he said. “You never want to say in absolute terms that you wouldn’t go back to it.Previously, Sledgehammer’s Glen Schofield explained that the demo was a 15 minute gameplay slice built in about six months. Condrey explained that the demo “really gave you a great epic opening, some big moments, some compelling gameplay. There was something there we were pretty proud of.” Call of Duty: Advanced Warfare is the game Sledgehammer eventually got to making, and you can learn all about its new features in our IGN First spotlight.

Mitch Dyer is an associate editor at IGN. He's trying to read 50 books in 2014. These are the 50 . Talk to Mitch about books and other stuff on Twitter at @MitchyD and subscribe to MitchyD on Twitch