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
dnlooksfunnyshade Make monsters pink
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