Duke Nukem: Zero Hour

Press Down, A, Up, L, Z, R, C-Up, C-Down, B, C-Left

On the title screen, enter the following:

This code will enable you to do all kinds of codes such as invincibility and all weapons. At the Press Start Screen, press C-Up, Up, C-Left, Right, C-Down, Down, C-Right, R, A, B. If you entered the code correctly, you'll hear a horse neigh. When you start a normal game a Debug menu will show up at the top-left corner of the screen. Press Start on controller 2 to cycle through the Debug menu's. Press the following buttons on controller 2 to activate these cheats at the appropriate menu:


SFX

L or R: FX down/up
Left or Right: FX down/up by 10
B: First person view
A: Third person view
Z: Play SFX
Level Warp

L or R: Level down/up
B: Skip level
Z: Advance to selected level
Midi

L or R: Song down/up
A: Play song
B: Stop song
Global Palette
B or A: Red down/up
C-Left or C-Down: Green down/up
C-Up or C-Right: Blue down/up
Cheat

Z: All weapons
L: All items
R: All keys
A: Invincibility
AI Debug Values
B or A: GVAR 1 down/up
C-Left or C-Down: GVAR 2 down/up
C-Up or C-Right: GVAR 3 down/up
Fog

B or A: Red down/up
C-Left or C-Down: Green down/up
C-Up or C-Right: Blue down/up
Left or Right: NR down/up
L or R: FR down/up
Sky Top

B or A: Red down/up
C-Left or C-Down: Green down/up
C-Up or C-Right: Blue down/up
Sky Bottom

B or A: Red down/up
C-Left or C-Down: Green down/up
C-Up or C-Right: Blue down/up
Clouds 1

B or A: Red down/up
C-Left or C-Down: Green down/up
C-Up or C-Right: Blue down/up
L or R: HT down/up
Down or Up: AN down/up
Left or Right: SP down/up
Clouds 2

B or A: Red down/up
C-Left or C-Down: Green down/up
C-Up or C-Right: Blue down/up
L or R: HT down/up
Down or Up: AN down/up
Left or Right: SP down/up
Player

L or R: DN Down/Up (changes player's character)
GFX

(Values cannot be changed)
AI

A: AI 0/1 (set to 1 to stop enemies)
L: Difficulty 0/1/2
R: Auto aim 0/1
Alpha Palette

B or A: R0 down/up
C-Left or C-Down: G0 down/up
C-Up or C-Right: B0 down/up
L or R: R1 down/up
Left or Right: G1 down/up
Down or Up: B1 down/up

Successfully complete each level with all babes rescued and all enemies killed.

Press Down, Up, L, B, Z, Left, C-Up, C-Right, C-Left, Z when "Press Start" appears at the opening screen. A sound will confirm correct code entry.

Get maximum amount of the following to unlock the cheats that are descreibed in the following.

On Level 2, The Streets, collect a powerful gun such as the grenade launcher, or something that destroys a large area. Enter the Dukeburger Restaurant. Equip your powerful weapon and if you want and kill the army man on the landing of the steps. Move into the corner of the landing very slowly and look into the top room until both army men are in your view. Shoot a few grenades at the army men until both are dead -- pick up their guns. Walk into the room -- as if the army men were still there, Duke will start to talk to them, and the guns will respond to Duke. Note: This also creates a hole in the wall that can be entered to reach a hidden Babe.

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.

Destroy a fire hydrant, toiler, water pump, or another water source. Run up, stand in the water and repeatedly press B to slowly restore Duke's health until it reaches 100. Also, if you see a concentrated area of purple objects appearing from the ground, stand on it to refill your health.

Kill all opponents in level 9, "Jailbreak", to unlock the cheat option for maximum blaster ammunition.