| Code | Description |
| dnunlock | Unlocks doors |
| dnallen | says a message |
| dnclip | walk through walls (very unstable) |
| dncosmo | another message |
| dnhyper | steroids effect |
| dnbeta | yet another message |
| dnskill# | set skill level |
| dncoords | shows your coordinates |
| dnrate | displays the frame rate |
| dnitems | gives you power-ups |
| dnkeys | all keys |
| dndebug | displays debug info |
| dninventory | all power-ups |
| dnweapons | all weapons and full ammo |
| dnmonsters | toggles the monsters off |
| dncashman | throws money when you hit the use key |
| dnview | external Duke view (same as F7) |
| dnscotty## | level warp (episode, two-digit level number). To warp to level 7 in episode 1, you would type dnscotty107. It is important to include the zeroes |
| dnstuff | all weapons, keys and power-ups |
| dnshowmap | shows entire map |
| dncornholio | God mode and unlimited jetpack |
| dnkroz | same as Cornholio, but easier to type |