Duke Nukem: D-Day, also known as Duke Nukem: Man of Valor, is a canceled third-person shooter video game that was being developed by n-Space for the PlayStation 2. It began development in 1999 and was canceled in 2003.

As described by George Broussard:

“It was a PS2 game where Duke went back in time and was a key factor in all the major WW2 events, and helped turn the tide. Of course it was a kind of alternate reality and there were alien Nazi’s. I wish that game had worked out because it would have been among the very first WW2 games to come out, before you saw one in a week.”