I vaguely remember seeing a black and white screenshot of this in the back of a 3D Realms manual/cd-booklet (possibly for another 3D Realms game, or for the Mac

I vaguely remember seeing a black and white screenshot of this in the back of a 3D Realms manual/cd-booklet (possibly for another 3D Realms game, or for the Macintosh release of Duke Nukem 3D which would have released after development on Duke Nukem Forever was underway).