Be careful when using this cheat.

First of all, you have to have the registered version of Duke Nukem 3D. On the CD there is a folder called 'Goodies'.Open it and copy everything in the 'Build' folder to your Duke Nukem directory (usually C:\Duke3d). There is a file called 'kextract.exe'. To use this go into a MS-DOS prompt box and switch to your Duke Nukem folder. Then type (with the spaces)
kextract.exe Duke3d.grp *.map
This will extract all the game files out of the grouped file.You can use the 'build.exe' file to edit all '*.map' files. There is a help file for Build if you get stuck. If you edit a level and want to get the original again, simply extract the file you changed (Ex. e1l2.map ,the second level of episode 1). The *.map simply means extract all files of .map type. After you edit the levels or just look at them, use 'kgroup.exe' the same way you used kextract.Using this cheat you can look at levels and change to make them easier, or for you true Dukesters out there you can make the levels harder.You can even make your own levels!If you make some good ones, e-mail them to me at davidandlydia@worldnet.att.net!