Duke Nukem 3D features the adventures of the titular macho Duke Nukem (voiced by Jon St. John), who fights back an alien invasion on Earth. Reception of Duke Nukem 3D has been largely positive. Reviewers praised the interactivity of the environment and the humor within the game. Similarly it was a big commercial hit selling about 3.5 million copies.[4] The game’s erotic elements and portrayal of women have incited controversy. After fifteen years in development hell, a direct sequel was released called Duke Nukem Forever.