Enter these codes during gameplay. The following codes cannot be used when the game setting is on “Damn, I’m Good!”.
| Command | Effect |
| dnitems | Adds all items, all keys, and max body armor |
| dninventory | Adds all items, max body armor |
| dnstuff | Adds all items, weapons, keys, ammo, and gives max armor |
| dnkeys | Adds all keys to inventory (Red, Yellow and Blue) |
| dnweapons | Adds all weapons and gives maximum ammo |
| dnhyper | Adds Night Vision Goggles and Steroids to Inventory, uses Steroids |
| dnskillX | Change to skilll level X (1-4), restarts level |
| dnview | Changes to 3rd-Person View |
| dncoords | Displays current coordinates, viewing position, and other information |
| dndebug | Displays debug information (upper left corner) |
| dntodd | Show “REGISTER COSMO” message |
| dnallen | Shows “BUY MAJOR STRYKER” message |
| dnbeta | Shows “PIRATES SUCK!” message |
| dncosmo | Shows “REGISTER COSMO” message (Version 1.3d and prior only) |
| dnshowmap | Shows entire map of level (press the map key) |
| dnrate | shows the framerate |
| dncashman | Throw some money when the “open” key is pressed. |
| dnmonsters | Toggle monsters on / off |
| dnclip | Toggles clipping (walk through walls) |
| dncornholio | Toggles God Mode (Invincibility), Gives Jetpack (unlimited while cheat is on) |
| dnkroz | Toggles God Mode (Invincibility), Gives Jetpack (unlimited while cheat is on) |
| dnunlock | Triggers all the doors, forcefields etc. in the level to be unlocked / locked (only works in the registered version) |
| dnscottyXYY | Warp to Episode X (1-4) Level YY |
Double Mighty Foot
This only works in the original Duke Nukem 3D for DOS and variants.(Plutonium Pak, etc.) Select Weapon 1(Duke’s Foot) then hold the Fire button. As you’re doing this, hold down the Mighty Foot button as well. Duke will now be kicking 1.5 times per kick! Not only that, but he’s doing so using both his left and right feet at the same time.
God Mode in Damn, I’m Good
First active god mode in any other difficulty level except Damn, I’m good. After that, wrap to a boss and kill it. Once you have done that, start a new game on Damn, I’m good and you’ll be in god mode. This works until you go to a lower difficulty level and deactivate it or quit the game entirely.
