Duke Nukem: Zero Hour is a third-person shooter developed by 3D Realms and published by GT Interactive in 1999, made exclusively for the Nintendo 64 (N64). It carries forward the classic Duke Nukem series elements: players take on the role of Duke Nukem, traveling across different timelines to stop alien invasions of Earth. Known for its rich weapon system, varied level design and humorous tone, it is deeply loved by players.