The Duke Nukem Forever: The Doctor Who Cloned Me Walkthrough will guide you throug the single player campaign in which you will go from the beginning level to the last levels of this DLC. There will be new achievements, trophies and maps that you will go through.
Follow the DNF: The Doctor Who Cloned Me Walkthrough and you will have an easier time collecting the achievements, trophies and many more items along the playthrough. The DLC also comes with the new 4 multiplayer maps in which will bring you more details about it for xbox 360, PS3 and PC and some tips and tricks with cheats to help you get the most out of this DLC.