Duke Nukem: Zero Hour (N64)

Hints & Cheats:

Freeze Thrower and unlimited ammunition:
Press Down, Up, A, L, R, Z when "Press Start" appears at the opening screen. A sound will confirm correct code entry.


Easy Western period Boss kill:
Get the sniper rifle before facing the giant scorpion at last stage of the western time period. Go out to the entrance when you can barely or see half of the scorpion. Pull out the sniper rifle, aim at its body, and start firing.


Cheat mode:
Press C-Left, Left, Up, Right-C, R, R, C-Down, L, C-Up, Up, Right, C-Right,
Start at the "Press Start" screen to unlock all cheat options.


.30-.30 Rifle with infinite ammo:
At the press start screen press C-up, C-down, C-left, C-right, L, R.


Regain health:
When you shoot a fire hydrant in the game stand next to it and press the B
button. This will replenish your health to 100.


Titanic Level:
To access the Titanic level "GOING DOWN" find all the time machine
pieces before you get to "THE RACK" and a second exit portal should
appear in the room just off the first.


Wetworld Level:
To access the "WETWORLD" level play through level 3 'NUCLEAR
WINTER' and when you reach the rail tracks leading to the communicator
you have to power up drop off onto the roof below where you will see a
medi kit. Now jump off this roof into the water (which is only on 1 side)
and swim to a floating platform where you will see the level exit.


Aradius Level:
You have to beat the entire game without dying once.


All guns & infinite ammo:
At the main menu press A, B, A, C-Up, C-Down, Left, A


Play as X-Terminator:
Beat the final boss to unlock X-Terminator in multiplayer.


How to Find Secrets with a Gun:
If you have smg cheat or gatling cheat or if you have the gun. just point the gun
at the wall and fire it. When you are firing the gun at the wall walk down when your
bulletholes disapper that where there is there is a secret.


Get More Multiplayer Characters:
If you save your game after you finish a level you get some additional multiplayer characters.


FPS Mode and Action Nuk'em Mode:
When you beat the game you get these two modes. First Person Mode puts you in
the perspective like in Duke Nukem 3D. Action Mode makes you have 1-hit
kills.


Extreme Mode:
Beat every level getting all of the babes and killing all of the enemies and
you get extreme mode. It is just a harder level of difficulty.


First person view:
Press Down, Up, L, B, Z, Left, C-Up, C-Right, C-Left, Z when "Press Start" appears at the opening screen.


Action Nuk'em mode:
When "Press Start" appears at the opening screen, press Down, Down, A, Z, Z, Left, A. This allows Duke to kill opponents with one shot.


Select Skin:
When "Press Start" appears at the opening screen, press C-Left, R, Left, Up, Down, B, A, Z. Go on as if you are starting a multiplayer game, and the character that the first player selects will replace Duke in single player mode.


Extra Group 1 multi-player characters:
When "Press Start" appears at the opening screen, press A, L, R, Left, B, Down, Up.


Extra Group 2 multi-player characters:
When "Press Start" appears at the opening screen, press B, A, A, R, L.


Extra Group 3 multi-player characters:
When "Press Start" appears at the opening screen, press L, L, Up, Down, R, B, A.


Extra Group 4 multi-player characters:
When "Press Start" appears at the opening screen, press B, B, B, R, Left, A.


Extra Group 5 multi-player characters:
When "Press Start" appears at the opening screen, press Right, B, Left, L, A, Z.


Extra Group 6 multi-player characters:
When "Press Start" appears at the opening screen, press Up, Down, B, A, A, Left.


Cheats codes, PAL version:
Cheat Menu : Left, Down, L, L, Up, Right, Left, Up
All Items: C-Right, Down, L, C-Up, Left, C-Right, Left
Choose Level: R, L, R, C-Down, Right, Up, Left, C-Up,
Immortal: R, C-Right, R, L, R, R, R, Left
No Monsters: L, C-Up, Left, L, C-Down, Right, Left, Right