Big Duke, Little Duke
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.)
Midget Duke Execute the Big Duke trick, then turn off God Mode and shrink the big Duke Nukem. He'll now be smaller than normal but larger than "Little Duke."
Cheat Codes
To activate a cheat, press LEFT [twice], L [twice], RIGHT [twice], LEFT [twice] to open the cheat menu. Then enter its code below.
Cheat
|
Code
|
All items
|
R, right-C, RIGHT, L, left-C, LEFT, right-C, RIGHT
|
Invincibility
|
R [seven times], LEFT
|
No enemies
|
L, left-C, LEFT, R, right-C, RIGHT, LEFT [twice], RIGHT
|
Level select
|
L [three times], right-C, RIGHT, LEFT [twice], left-C
|
Come Fire Walk With Me
You can safely walk on lava for an infinite amount of time by pressing the jump button enough that your feet aren't 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.
Defeating the Overlord
When fighting the Overlord, stay in the water but don't submerge. As long as you're at the surface, you can hit him but he can't hit you.
WARNING: Don't use explosive weapons. If you do you will die.
Nearly Unlimited Ammo
First enter the invincibility cheat. Then select Dukematch. If anyone gets a shrinker, shrink someone. Now turn on invincibility. If the person you shrunk was using a weapon, step on them. Since god mode is on you'll just keep stomping on them. After every 3 stomps, another weapon will fall out of the player you shrunk. This now gives you nearly unlimited ammo!
Note: This cheat might slow down the game.Be careful when you do this.
No Monsters
Go to the cheat menu (see above) then press L, LEFT C, LEFT, R, RIGHT C, RIGHT, LEFT, LEFT, RIGHT. You will hear a siren if you did the code correctly. Then go in the cheat menu and now you can turn the monsters on and off.
Skip Levels 28 and 29
Go through the yellow key card door on level 27. Find the big body of water and pass through the waterfall. Beyond you'll see some trees by a red hand print on the wall. Go through the trees and hit the green auto-abort switch to skip to level 30.