Duke Nukem 3D Cheat Codes
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Version 1.3d:
DNKROZ          = God Mode Toggle
DNCORNHOLIO     = God Mode Toggle
DNSTUFF         = All weapons, ammo, and key cards
DNWEAPONS       = All weapons and ammo
DNITEMS         = All items and key cards
DNINVENTORY     = All items
DNKEYS          = All key cards
DNCLIP          = No Clipping Mode
DNSHOWMAP       = Full Map
DNHYPER         = Steroids
DNUNLOCK        = Opens all doors
DNSKILL#        = Changes skill to level #
DNSCOTTYell     = (Where e is the episode # and ll
                  is the two-digit level #) Level Warp
DNVIEW          = Chase plane view
DNMONSTERS      = Monsters will disappear as soon as they see Duke
DNCASHMAN       = Makes Duke throw money when you press the space bar
DNRATE          = Displays the frame rate
DNCOORDS        = Displays current coordinates
DNDEBUG         = Displays debugging info
DNTODD          = Displays message: Register Cosmo Today!
DNBETA          = Displays message: Pirates Suck!
DNALLEN         = Displays message: Buy Major Stryker

Version 1.1:
DNKROZ          = God Mode Toggle
DNCORNHOLIO     = God Mode Toggle
DNSTUFF         = All weapons, ammo, and key cards
DNITEMS         = All items and key cards
DNHYPER         = Steroids
DNVIEW          = Chase plane view
DNCASHMAN       = Makes Duke throw money when you press the space bar
DNRATE          = Displays the frame rate
DNCLIP          = No Clipping Mode
DNMONSTERS      = Monsters will disappear as soon as they see Duke

Version 1.0:
DNKROZ          = God Mode Toggle
DNCORNHOLIO     = God Mode Toggle
DNSTUFF         = All weapons, ammo, and key cards
DNITEMS         = All items and key cards
DNHYPER         = Steroids
DNVIEW          = Chase plane view
DNCASHMAN       = Makes Duke throw money when you press the space bar
DNRATE          = Displays the frame rate
DNSCOTTYel      = (Where e is the episode # and l is the level #) Level Warp
DNCOSMO         = Displays message: Register Cosmo Today!
DNBETA          = Displays message: Pirates Suck!
DNALLEN         = Displays message: Buy Major Stryker