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Duke Nukem: Zero Hour

Codes

Codes

On the title screen, enter the following:

EffectCode
Down, Down, A, Z, Z, Left, AAction Nukem Mode
Down, A, Up, L, Z, R, Top-C, Bottom-C, B, Left-CAll weapons
Top-C, Left-C, Z, B, L, Z, ABig gun mode
B, Up, Down, Down, A, Z, A, RightBig head mode
A,L,R,LEFT,B,DOWN,UPEnforcer,Enforcer Captain & Battle Enforcer
RIGHT,B,LEFT,L,A,ZEvil Duke,Custer,Ripper,& X-Terminator
Down, Up, L, Z, Top-C, Right-C, Left-C, and ZFirst Person View
Down, Up, Left, Left, A, Right, DownFlat shade map
Down, Up, A, L, R, ZFreeze Thrower and unlimited ammo
A, A, Z, A, R, Bottom-C, BHigh speed zombies
B, Z, Up, L, A, Right-C, AIce skin
UP,DOWN,B,A,A,LEFTMarine & Sergeant
B,B,B,R,LEFT,AMarshall,Sheriff,Squaw,Survivor,& Kimberly Strokes
d-down, d-up, A, L, R and ZOdd Gun with Unlimited Ammo
B,A,A,R,LPig Cop,Riot Pig,Road Hog,War Pig,Cowboy Grunt,Savage Grunt,Soldier grunt,& Capitalist Pig
L,L,UP,DOWN,R,B,APosh Duke,Battle Dress Duke,& Dogtag Duke
top C, bottom C, left C, right C, L, and RRifle with Unlimited Ammo
d-up, d-down, d-left, d-right,L and RShotgun With Unlimited Ammo
Left-C, R, Left, Up, Down, B, A, ZSkin select
Z, A, L, B, Down, Up, RWeather

Contributed By: ElementalKnight, KasketDarkfyre, freakunique, Mr Xenomorph, and nearperfectgamer.

Unlockables

Get all of the following to unlock weapons, other interesting features & a secret level.

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

UnlockableHow to Unlock
Kill every enemy on the Nuclear Winter level.Big Gun Mode
Nab all babes on the Liberty or Death Level.Big Head Mode
Kill everybody on the Dry Town level.Fast Zombies
Complete the Zero Hour level.First-Person & Action Nukem Mode
Get all Secrets on the Wetworld level.Flat Shading
Get all of the babes in the Fallout level.Ice skins (enemies, Duke & breakable objects).
Get 100 % overall rating on every level.Select Skin
Get all of the babes on the Up Ship Creek level.Unlimited Claw-12 Shotgun
Kill every enemy on The Brothers Nukem level.Unlimited Freezethrower
Save all the babes on the Ailen Mother level.Unlimited Gamma Cannon
Get all kills on Hydrogen Bomb level *[in order to use, you have to start a new game.]Unlimited Gattling Gun
Get all of the babes in the Fort Roswell.Unlimited Lever Action .30-30 Rifle
Get all kills on the Jail Break Level.Unlimited M-80 Blaster
Get all secrets on Dawn of the Duke.Unlimited MP-10 SMG
Kill everything on the Whitechapel Killings level.Unlimited Sawed-Off Shotgun
Get all of the babes on Going Down.Unlimited Sniper Rifle
Get all of the secrets in The Rack level.Unlimited Volt Cannon
Get all of the Time Machine Parts in the levels (except boss levels & from The Rack level to the last boss level).Unlock Going Down Secret Level
Get all kills on Under Seige.Weather

Contributed By: Duke_Plisskin.

Unlock Going Down

To unlock the hidden level, Going Down, obtain all of the time machine pieces before reaching the level, The Rack. After using the cyborg alien's head to unlock the door near the end of the level, there should be a second portal that has a fully built time mahcine in it, and this room should be adjacent to the first portal room. It is possible to replay this level to unlock the hidden level if time machine pieces are missed during a first play-through of the game.

Contributed By: Reaper.

Unlock Wetworld

In the third level, Nuclear Winter, you can unlock the hidden level, Wetworld. At the end of the level as you are crossing the raised train tracks, to get to the signal transmtter, if you look down while moving across the tracks, you'll see a medkit on one of the roofs. Jump onto the roof, then jump into the water and swim until you come to the platform and end-level icon.

Contributed By: Reaper.

Secrets

Debug Mode

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

Contributed By: unodos12345.

Regain Health

During gameplay, find a fire hydrant or toilet. Destroy it, and stand next to the flowing water coming from its remains. Press the 'B' button, and your health will slowly regenerate, and go back up.

Contributed By: Vegetaman.