These Cheat codes are for Duke Nukem 3D version 1.3d.
| DN3D Cheat Codes | |
| Code(s) | What it does |
| dncornholio or dnkroz |
Toggles God mode, which makes you invulnerable and gives you an unlimited use jetpack. |
| dnstuff | Gives you all the weapons, powerups, and access cards, plus full ammo. |
| dnitems | Gives you all the powerups and access cards. |
| dnscotty### | Level Warp (the first # represents the episode, the following ## represents the level) |
| dnview | Toggles view mode (same effect as F7 key) |
| dnhyper | Gives you a dose of the Steroids power-up. |
| dnrate | Diplays the frame rate in the upper left hand corner. |
| dnskill# | Changes the skill level of the game. |
| dnclip | Toggles clipping (walk-thru-walls) mode. WARNING: Walking outside the confines of the level tends to kill you, whether you're in God mode or not. |
| dnmonsters | Toggles the presence of monsters. |
| dncoords | Shows your position coordinates. |
| dnshowmap | Toggles the display of the entire map. |
| dnweapons | Gives you all the weapons plus full ammo. |
| dninventory | Gives you all the powerups. |
| dnkeys | Gives you all the access cards. |
| dndebug | Provides alot of debugging info, could be useful for hunting down problems. |
| Not-so-useful Cheat Codes | |
| Code(s) | Effect |
| dncashman | Duke tosses money around every time you hit the spacebar. |
| dnallen | Gives you the message "Buy Major Sryker" |
| dnbeta | Gives you the message "Pirates suck!" |
| dntodd | Gives you the message "Register Cosmo Today!"; used to be dncosmo |