| Code | What it does |
| DNKROZ | God Mode |
| DNSTUFF | All weapons, items, ammo, and keys |
| DNSCOTTY%## | Level warp. % = episode number (1-4), ## = level number(01-11) |
| DNCLIP | No clipping mode |
| DNCORNHOLIO | God mode |
| DNCOORDS | Shows your coordinates in the level |
| DNVIEW | Rear view, displays message. Same as pressing F7 |
| DNTIME | Doesn't appear to do anything |
| DNUNLOCK | Unlocks all doors on the map |
| DNCASHMAN | Duke throws money around when you hit the spacebar |
| DNITEMS | All weapons, ammo, and inventory items |
| DNRATE | Toggle frame rate counter |
| DNSKILL# | Change game difficulty. # is skill level |
| DNBETA | Displays secret message 1 |
| DNHYPER | Give steroids and activates them |
| DNMONSTERS | Turns presense of monsters on and off |
| DNTODD | Displays secret message 2 |
| DNSHOWMAP | Reveals all map, type again to revert to what you've found. |
| DNALLEN | Displays secret message 3 |
| DNWEAPONS | All weapons/ammo |
| DNINVENTORY | All inventory items |
| DNKEYS | All keys |
| DNDEBUG | Displays debug information |
These were all obtained from the DUKE3D.EXE file. There were also a couple of slots in the area marked <reserved>. If anyone knows about these, let me know.