No Monsters
By: Robbie Gary via N64.com

Go to the cheat menu. Then hit these buttons in this order: L, LEFT C, LEFT, R, RIGHT C,
RIGHT, LEFT, LEFT, RIGHT. You will here a siren if you did the code correctly. Then go in the
cheat menu and now you can turn the monsters on and off.
 

Size Glitch
By: CapnBob via N64.com

There is a way to play big or small in Duke Nukem. This code will work on co-op or deathmatch.
To do this code in co-op you need Invincibility and items codes. Turn on friendly fire, then use
the weapons code, shoot your buddy with the shrinker, or expander. Small Duke: Shoot, put on
invincibility then turn it off again. The player will not grow back (the drawback: you can't have any
weapons).

Big Duke: Get the expander, (with God mode off) and shoot the other Duke until he starts to
expand. Just before he explodes put on God mode, stop shooting, then turn off god mode. You
now have a giant duke that still can be killed. (Note, you may have to try it a few times to get it
right).
 

Invincibility
By: CapnBob via N64.com

To get the invincibility code players must first enter the cheat menu code ( Press the following at
the main menu to access the hidden cheat menu: LEFT, LEFT, L, L, RIGHT, RIGHT, LEFT,
LEFT. Now the cheat menu will be accessible). Then simply hit R button seven times in a row
and then press left on the directional pad. A sound should signify that it worked. Now go into the
cheat menu and turn invincibility on.
 

Fire walk
By: Turok

safely walk on lava for a infinite amount of time by pressing the jump button enough that your
feet arnt on the ground for more than a second. Keep it up and you can stay in lava without
protection for as long as you want.

Weapon Warp
By: Deep6 (Deep6@goplay.com) via N64CC

In Deathmatch, any weapon can be throwm into a teleporter to have it appear on the other end.
Bullets, missles, grenades, plasma, it all goes through. You have to wait for the item to
completly pass befor you can throw in another, ie- rapid fire bullets will not go through. This is
great for droping gifts in for your opponents while you stay safe. Just be careful not to stand on a
teleporter for too long, because if someone else steps on it, you'll get telefraged.

Turn Items On
By Blair-Beavis@rocketmail.com

Perform the code to access the cheat menu (from main menu: LEFT, LEFT, L, L, RIGHT,
RIGHT, LEFT, LEFT).

Now at the main menu input: R, Right C, RIGHT, L, Left C, LEFT, Right C, RIGHT. This will
enable all items to be toggled on or off.

Duke Nukem 64 Cheat Menu
By Blair-Beavis@rocketmail.com

Press the following at the main menu to access the hidden cheat menu: LEFT, LEFT, L, L,
RIGHT, RIGHT, LEFT, LEFT. Now the cheat menu will be accessible.

Fountain of Youth
By: Bobby (messedup64@aol.com) via N64CC

It's always fun to blow stuff up right? Well now you can have fun and get power at the same
time. First, the fon part: Shoot or blow up a water fountain, fire hydrant, or even a toilet. Then:
Walk over to the water that's squirting up and hold "A"{default} You will gradually regain your
energy.