Duke Nukem 3D

Type in the code at any time during game (These won't work if you assigned a key that is in the code.)

DNALLEN-Display "Buy Major Stryker"
DNBETA-Displays "Pirates suck"
DNCASHMAN-Lets you throw dollar notes when you press space...
DNCLIP-No clipping, walk through walls (toggle)
DNCOORDS-Shows your coordinates
DNCORNHOLIO-God Mode
DNCROSSHAIR-Crosshairs appear to help you aim
DNDEBUG-Displays debug information
DNHYPER-Steroids
DNINVENTORY-All powerups
DNITEMS-All items
DNKEYS-All access cards
DNKROZ-God Mode
DNMONSTERS-Removes all monsters (toggle)
DNRATE-Displays frame rate
DNSHOWMAP-Shows entire map (toggle)
DNSKILL#-Changes the skill level
DNSTUFF-All items
DNSCOTTY###-Warps to desired mission, level
DNTODD-Display "Register cosmo today"
DNUNLOCK-Unlocks all doors
DNVIEW-Shows Duke in front of you
DNWEAPONS-All weapons and full ammo

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