In 2001 N-Space was working on a new Duke Nukem game for the Playstation 2 named “D-Day” (also know as Duke Nukem: Man Of Valor), that would have been published by Rockstar Games. Sadly, D-Day was canceled for unknown reasons. This project would have been the third Duke Nukem game developed by N-Space, after DN: Land of the Babes (2000) and DN: Time to Kill (1998). The game would have seen our hero in World War 2 themed levels, with aliens and time travel.
Thanks to Sir_Brando for the english corrections!