I seem to remember that one of the magazines of the time (N64 Magazine, maybe) did a walkthrough of the game, but I never read it, so I don't know if it was detailed enough to list the secrets and the location of all of the enemies. Shows how to kill 63 out of 64 of the enemies (and finishes with a 99% rating), so maybe the one in there that you haven't found will tell you where to look for the last one. Regarding Duke Nukem: Zero Hour's Up Ship Creek level, the video at
