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. It carries forward classic "Duke Nukem" franchise elements: players take on the role of Duke Nukem, traveling across different eras to stop aliens from rewriting history and conquering Earth. Known for its rich weapon system, varied level design and humorous tone, it is a fan favorite. Note: the game contains violence and adult content, intended for mature players.