Duke Nukem's Penthouse Paradise Developed by Intersphere Communications Ltd. Platform DOS Published by GT Interactive Software Corp. Released May, 1997 Genre DLC / Add-on Add-on Story / Mission Description Duke Nukem's Penthouse Paradise is an official add-on level for Duke Nukem 3D , available exclusively from GT Interactive and Penthouse Magazine. Taking place between Duke Nukem 3D and the Plutonium Pak , aliens interrupt Duke's vacation and a couple of Penthouse photo shoots. Duke has to fight his way through a hotel, clubs and finally the Penthouse offices. From Mobygames.com. Original Entry